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 " ("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 #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 int en_print(const char *level, const struct mlx4_en_priv *priv, 76 const char *format, ...) 77 { 78 va_list args; 79 struct va_format vaf; 80 int i; 81 82 va_start(args, format); 83 84 vaf.fmt = format; 85 vaf.va = &args; 86 if (priv->registered) 87 i = printk("%s%s: %s: %pV", 88 level, DRV_NAME, priv->dev->name, &vaf); 89 else 90 i = printk("%s%s: %s: Port %d: %pV", 91 level, DRV_NAME, dev_name(&priv->mdev->pdev->dev), 92 priv->port, &vaf); 93 va_end(args); 94 95 return i; 96 } 97 98 void mlx4_en_update_loopback_state(struct net_device *dev, 99 netdev_features_t features) 100 { 101 struct mlx4_en_priv *priv = netdev_priv(dev); 102 103 priv->flags &= ~(MLX4_EN_FLAG_RX_FILTER_NEEDED| 104 MLX4_EN_FLAG_ENABLE_HW_LOOPBACK); 105 106 /* Drop the packet if SRIOV is not enabled 107 * and not performing the selftest or flb disabled 108 */ 109 if (mlx4_is_mfunc(priv->mdev->dev) && 110 !(features & NETIF_F_LOOPBACK) && !priv->validate_loopback) 111 priv->flags |= MLX4_EN_FLAG_RX_FILTER_NEEDED; 112 113 /* Set dmac in Tx WQE if we are in SRIOV mode or if loopback selftest 114 * is requested 115 */ 116 if (mlx4_is_mfunc(priv->mdev->dev) || priv->validate_loopback) 117 priv->flags |= MLX4_EN_FLAG_ENABLE_HW_LOOPBACK; 118 } 119 120 static int mlx4_en_get_profile(struct mlx4_en_dev *mdev) 121 { 122 struct mlx4_en_profile *params = &mdev->profile; 123 int i; 124 125 params->udp_rss = udp_rss; 126 params->num_tx_rings_p_up = min_t(int, num_online_cpus(), 127 MLX4_EN_MAX_TX_RING_P_UP); 128 if (params->udp_rss && !(mdev->dev->caps.flags 129 & MLX4_DEV_CAP_FLAG_UDP_RSS)) { 130 mlx4_warn(mdev, "UDP RSS is not supported on this device.\n"); 131 params->udp_rss = 0; 132 } 133 for (i = 1; i <= MLX4_MAX_PORTS; i++) { 134 params->prof[i].rx_pause = 1; 135 params->prof[i].rx_ppp = pfcrx; 136 params->prof[i].tx_pause = 1; 137 params->prof[i].tx_ppp = pfctx; 138 params->prof[i].tx_ring_size = MLX4_EN_DEF_TX_RING_SIZE; 139 params->prof[i].rx_ring_size = MLX4_EN_DEF_RX_RING_SIZE; 140 params->prof[i].tx_ring_num = params->num_tx_rings_p_up * 141 MLX4_EN_NUM_UP; 142 params->prof[i].rss_rings = 0; 143 } 144 145 return 0; 146 } 147 148 static void *mlx4_en_get_netdev(struct mlx4_dev *dev, void *ctx, u8 port) 149 { 150 struct mlx4_en_dev *endev = ctx; 151 152 return endev->pndev[port]; 153 } 154 155 static void mlx4_en_event(struct mlx4_dev *dev, void *endev_ptr, 156 enum mlx4_dev_event event, unsigned long port) 157 { 158 struct mlx4_en_dev *mdev = (struct mlx4_en_dev *) endev_ptr; 159 struct mlx4_en_priv *priv; 160 161 switch (event) { 162 case MLX4_DEV_EVENT_PORT_UP: 163 case MLX4_DEV_EVENT_PORT_DOWN: 164 if (!mdev->pndev[port]) 165 return; 166 priv = netdev_priv(mdev->pndev[port]); 167 /* To prevent races, we poll the link state in a separate 168 task rather than changing it here */ 169 priv->link_state = event; 170 queue_work(mdev->workqueue, &priv->linkstate_task); 171 break; 172 173 case MLX4_DEV_EVENT_CATASTROPHIC_ERROR: 174 mlx4_err(mdev, "Internal error detected, restarting device\n"); 175 break; 176 177 default: 178 if (port < 1 || port > dev->caps.num_ports || 179 !mdev->pndev[port]) 180 return; 181 mlx4_warn(mdev, "Unhandled event %d for port %d\n", event, 182 (int) port); 183 } 184 } 185 186 static void mlx4_en_remove(struct mlx4_dev *dev, void *endev_ptr) 187 { 188 struct mlx4_en_dev *mdev = endev_ptr; 189 int i; 190 191 mutex_lock(&mdev->state_lock); 192 mdev->device_up = false; 193 mutex_unlock(&mdev->state_lock); 194 195 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) 196 if (mdev->pndev[i]) 197 mlx4_en_destroy_netdev(mdev->pndev[i]); 198 199 flush_workqueue(mdev->workqueue); 200 destroy_workqueue(mdev->workqueue); 201 (void) mlx4_mr_free(dev, &mdev->mr); 202 iounmap(mdev->uar_map); 203 mlx4_uar_free(dev, &mdev->priv_uar); 204 mlx4_pd_free(dev, mdev->priv_pdn); 205 kfree(mdev); 206 } 207 208 static void *mlx4_en_add(struct mlx4_dev *dev) 209 { 210 struct mlx4_en_dev *mdev; 211 int i; 212 int err; 213 214 printk_once(KERN_INFO "%s", mlx4_en_version); 215 216 mdev = kzalloc(sizeof(*mdev), GFP_KERNEL); 217 if (!mdev) { 218 err = -ENOMEM; 219 goto err_free_res; 220 } 221 222 if (mlx4_pd_alloc(dev, &mdev->priv_pdn)) 223 goto err_free_dev; 224 225 if (mlx4_uar_alloc(dev, &mdev->priv_uar)) 226 goto err_pd; 227 228 mdev->uar_map = ioremap((phys_addr_t) mdev->priv_uar.pfn << PAGE_SHIFT, 229 PAGE_SIZE); 230 if (!mdev->uar_map) 231 goto err_uar; 232 spin_lock_init(&mdev->uar_lock); 233 234 mdev->dev = dev; 235 mdev->dma_device = &(dev->pdev->dev); 236 mdev->pdev = dev->pdev; 237 mdev->device_up = false; 238 239 mdev->LSO_support = !!(dev->caps.flags & (1 << 15)); 240 if (!mdev->LSO_support) 241 mlx4_warn(mdev, "LSO not supported, please upgrade to later " 242 "FW version to enable LSO\n"); 243 244 if (mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull, 245 MLX4_PERM_LOCAL_WRITE | MLX4_PERM_LOCAL_READ, 246 0, 0, &mdev->mr)) { 247 mlx4_err(mdev, "Failed allocating memory region\n"); 248 goto err_map; 249 } 250 if (mlx4_mr_enable(mdev->dev, &mdev->mr)) { 251 mlx4_err(mdev, "Failed enabling memory region\n"); 252 goto err_mr; 253 } 254 255 /* Build device profile according to supplied module parameters */ 256 err = mlx4_en_get_profile(mdev); 257 if (err) { 258 mlx4_err(mdev, "Bad module parameters, aborting.\n"); 259 goto err_mr; 260 } 261 262 /* Configure which ports to start according to module parameters */ 263 mdev->port_cnt = 0; 264 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) 265 mdev->port_cnt++; 266 267 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) { 268 if (!dev->caps.comp_pool) { 269 mdev->profile.prof[i].rx_ring_num = 270 rounddown_pow_of_two(max_t(int, MIN_RX_RINGS, 271 min_t(int, 272 dev->caps.num_comp_vectors, 273 DEF_RX_RINGS))); 274 } else { 275 mdev->profile.prof[i].rx_ring_num = rounddown_pow_of_two( 276 min_t(int, dev->caps.comp_pool/ 277 dev->caps.num_ports - 1 , MAX_MSIX_P_PORT - 1)); 278 } 279 } 280 281 /* Create our own workqueue for reset/multicast tasks 282 * Note: we cannot use the shared workqueue because of deadlocks caused 283 * by the rtnl lock */ 284 mdev->workqueue = create_singlethread_workqueue("mlx4_en"); 285 if (!mdev->workqueue) { 286 err = -ENOMEM; 287 goto err_mr; 288 } 289 290 /* At this stage all non-port specific tasks are complete: 291 * mark the card state as up */ 292 mutex_init(&mdev->state_lock); 293 mdev->device_up = true; 294 295 /* Setup ports */ 296 297 /* Create a netdev for each port */ 298 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) { 299 mlx4_info(mdev, "Activating port:%d\n", i); 300 if (mlx4_en_init_netdev(mdev, i, &mdev->profile.prof[i])) 301 mdev->pndev[i] = NULL; 302 } 303 304 /* Initialize time stamp mechanism */ 305 if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_TS) 306 mlx4_en_init_timestamp(mdev); 307 308 return mdev; 309 310 err_mr: 311 (void) mlx4_mr_free(dev, &mdev->mr); 312 err_map: 313 if (mdev->uar_map) 314 iounmap(mdev->uar_map); 315 err_uar: 316 mlx4_uar_free(dev, &mdev->priv_uar); 317 err_pd: 318 mlx4_pd_free(dev, mdev->priv_pdn); 319 err_free_dev: 320 kfree(mdev); 321 err_free_res: 322 return NULL; 323 } 324 325 static struct mlx4_interface mlx4_en_interface = { 326 .add = mlx4_en_add, 327 .remove = mlx4_en_remove, 328 .event = mlx4_en_event, 329 .get_dev = mlx4_en_get_netdev, 330 .protocol = MLX4_PROT_ETH, 331 }; 332 333 static int __init mlx4_en_init(void) 334 { 335 return mlx4_register_interface(&mlx4_en_interface); 336 } 337 338 static void __exit mlx4_en_cleanup(void) 339 { 340 mlx4_unregister_interface(&mlx4_en_interface); 341 } 342 343 module_init(mlx4_en_init); 344 module_exit(mlx4_en_cleanup); 345 346