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 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 int 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 int i; 87 88 va_start(args, format); 89 90 vaf.fmt = format; 91 vaf.va = &args; 92 if (priv->registered) 93 i = printk("%s%s: %s: %pV", 94 level, DRV_NAME, priv->dev->name, &vaf); 95 else 96 i = printk("%s%s: %s: Port %d: %pV", 97 level, DRV_NAME, dev_name(&priv->mdev->pdev->dev), 98 priv->port, &vaf); 99 va_end(args); 100 101 return i; 102 } 103 104 void mlx4_en_update_loopback_state(struct net_device *dev, 105 netdev_features_t features) 106 { 107 struct mlx4_en_priv *priv = netdev_priv(dev); 108 109 priv->flags &= ~(MLX4_EN_FLAG_RX_FILTER_NEEDED| 110 MLX4_EN_FLAG_ENABLE_HW_LOOPBACK); 111 112 /* Drop the packet if SRIOV is not enabled 113 * and not performing the selftest or flb disabled 114 */ 115 if (mlx4_is_mfunc(priv->mdev->dev) && 116 !(features & NETIF_F_LOOPBACK) && !priv->validate_loopback) 117 priv->flags |= MLX4_EN_FLAG_RX_FILTER_NEEDED; 118 119 /* Set dmac in Tx WQE if we are in SRIOV mode or if loopback selftest 120 * is requested 121 */ 122 if (mlx4_is_mfunc(priv->mdev->dev) || priv->validate_loopback) 123 priv->flags |= MLX4_EN_FLAG_ENABLE_HW_LOOPBACK; 124 } 125 126 static int mlx4_en_get_profile(struct mlx4_en_dev *mdev) 127 { 128 struct mlx4_en_profile *params = &mdev->profile; 129 int i; 130 131 params->udp_rss = udp_rss; 132 params->num_tx_rings_p_up = min_t(int, num_online_cpus(), 133 MLX4_EN_MAX_TX_RING_P_UP); 134 if (params->udp_rss && !(mdev->dev->caps.flags 135 & MLX4_DEV_CAP_FLAG_UDP_RSS)) { 136 mlx4_warn(mdev, "UDP RSS is not supported on this device\n"); 137 params->udp_rss = 0; 138 } 139 for (i = 1; i <= MLX4_MAX_PORTS; i++) { 140 params->prof[i].rx_pause = 1; 141 params->prof[i].rx_ppp = pfcrx; 142 params->prof[i].tx_pause = 1; 143 params->prof[i].tx_ppp = pfctx; 144 params->prof[i].tx_ring_size = MLX4_EN_DEF_TX_RING_SIZE; 145 params->prof[i].rx_ring_size = MLX4_EN_DEF_RX_RING_SIZE; 146 params->prof[i].tx_ring_num = params->num_tx_rings_p_up * 147 MLX4_EN_NUM_UP; 148 params->prof[i].rss_rings = 0; 149 params->prof[i].inline_thold = inline_thold; 150 } 151 152 return 0; 153 } 154 155 static void *mlx4_en_get_netdev(struct mlx4_dev *dev, void *ctx, u8 port) 156 { 157 struct mlx4_en_dev *endev = ctx; 158 159 return endev->pndev[port]; 160 } 161 162 static void mlx4_en_event(struct mlx4_dev *dev, void *endev_ptr, 163 enum mlx4_dev_event event, unsigned long port) 164 { 165 struct mlx4_en_dev *mdev = (struct mlx4_en_dev *) endev_ptr; 166 struct mlx4_en_priv *priv; 167 168 switch (event) { 169 case MLX4_DEV_EVENT_PORT_UP: 170 case MLX4_DEV_EVENT_PORT_DOWN: 171 if (!mdev->pndev[port]) 172 return; 173 priv = netdev_priv(mdev->pndev[port]); 174 /* To prevent races, we poll the link state in a separate 175 task rather than changing it here */ 176 priv->link_state = event; 177 queue_work(mdev->workqueue, &priv->linkstate_task); 178 break; 179 180 case MLX4_DEV_EVENT_CATASTROPHIC_ERROR: 181 mlx4_err(mdev, "Internal error detected, restarting device\n"); 182 break; 183 184 case MLX4_DEV_EVENT_SLAVE_INIT: 185 case MLX4_DEV_EVENT_SLAVE_SHUTDOWN: 186 break; 187 default: 188 if (port < 1 || port > dev->caps.num_ports || 189 !mdev->pndev[port]) 190 return; 191 mlx4_warn(mdev, "Unhandled event %d for port %d\n", event, 192 (int) port); 193 } 194 } 195 196 static void mlx4_en_remove(struct mlx4_dev *dev, void *endev_ptr) 197 { 198 struct mlx4_en_dev *mdev = endev_ptr; 199 int i; 200 201 mutex_lock(&mdev->state_lock); 202 mdev->device_up = false; 203 mutex_unlock(&mdev->state_lock); 204 205 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) 206 if (mdev->pndev[i]) 207 mlx4_en_destroy_netdev(mdev->pndev[i]); 208 209 if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_TS) 210 mlx4_en_remove_timestamp(mdev); 211 212 flush_workqueue(mdev->workqueue); 213 destroy_workqueue(mdev->workqueue); 214 (void) mlx4_mr_free(dev, &mdev->mr); 215 iounmap(mdev->uar_map); 216 mlx4_uar_free(dev, &mdev->priv_uar); 217 mlx4_pd_free(dev, mdev->priv_pdn); 218 kfree(mdev); 219 } 220 221 static void *mlx4_en_add(struct mlx4_dev *dev) 222 { 223 struct mlx4_en_dev *mdev; 224 int i; 225 int err; 226 227 printk_once(KERN_INFO "%s", mlx4_en_version); 228 229 mdev = kzalloc(sizeof(*mdev), GFP_KERNEL); 230 if (!mdev) { 231 err = -ENOMEM; 232 goto err_free_res; 233 } 234 235 if (mlx4_pd_alloc(dev, &mdev->priv_pdn)) 236 goto err_free_dev; 237 238 if (mlx4_uar_alloc(dev, &mdev->priv_uar)) 239 goto err_pd; 240 241 mdev->uar_map = ioremap((phys_addr_t) mdev->priv_uar.pfn << PAGE_SHIFT, 242 PAGE_SIZE); 243 if (!mdev->uar_map) 244 goto err_uar; 245 spin_lock_init(&mdev->uar_lock); 246 247 mdev->dev = dev; 248 mdev->dma_device = &(dev->pdev->dev); 249 mdev->pdev = dev->pdev; 250 mdev->device_up = false; 251 252 mdev->LSO_support = !!(dev->caps.flags & (1 << 15)); 253 if (!mdev->LSO_support) 254 mlx4_warn(mdev, "LSO not supported, please upgrade to later FW version to enable LSO\n"); 255 256 if (mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull, 257 MLX4_PERM_LOCAL_WRITE | MLX4_PERM_LOCAL_READ, 258 0, 0, &mdev->mr)) { 259 mlx4_err(mdev, "Failed allocating memory region\n"); 260 goto err_map; 261 } 262 if (mlx4_mr_enable(mdev->dev, &mdev->mr)) { 263 mlx4_err(mdev, "Failed enabling memory region\n"); 264 goto err_mr; 265 } 266 267 /* Build device profile according to supplied module parameters */ 268 err = mlx4_en_get_profile(mdev); 269 if (err) { 270 mlx4_err(mdev, "Bad module parameters, aborting\n"); 271 goto err_mr; 272 } 273 274 /* Configure which ports to start according to module parameters */ 275 mdev->port_cnt = 0; 276 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) 277 mdev->port_cnt++; 278 279 /* Initialize time stamp mechanism */ 280 if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_TS) 281 mlx4_en_init_timestamp(mdev); 282 283 /* Set default number of RX rings*/ 284 mlx4_en_set_num_rx_rings(mdev); 285 286 /* Create our own workqueue for reset/multicast tasks 287 * Note: we cannot use the shared workqueue because of deadlocks caused 288 * by the rtnl lock */ 289 mdev->workqueue = create_singlethread_workqueue("mlx4_en"); 290 if (!mdev->workqueue) { 291 err = -ENOMEM; 292 goto err_mr; 293 } 294 295 /* At this stage all non-port specific tasks are complete: 296 * mark the card state as up */ 297 mutex_init(&mdev->state_lock); 298 mdev->device_up = true; 299 300 /* Setup ports */ 301 302 /* Create a netdev for each port */ 303 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) { 304 mlx4_info(mdev, "Activating port:%d\n", i); 305 if (mlx4_en_init_netdev(mdev, i, &mdev->profile.prof[i])) 306 mdev->pndev[i] = NULL; 307 } 308 309 return mdev; 310 311 err_mr: 312 (void) mlx4_mr_free(dev, &mdev->mr); 313 err_map: 314 if (mdev->uar_map) 315 iounmap(mdev->uar_map); 316 err_uar: 317 mlx4_uar_free(dev, &mdev->priv_uar); 318 err_pd: 319 mlx4_pd_free(dev, mdev->priv_pdn); 320 err_free_dev: 321 kfree(mdev); 322 err_free_res: 323 return NULL; 324 } 325 326 static struct mlx4_interface mlx4_en_interface = { 327 .add = mlx4_en_add, 328 .remove = mlx4_en_remove, 329 .event = mlx4_en_event, 330 .get_dev = mlx4_en_get_netdev, 331 .protocol = MLX4_PROT_ETH, 332 }; 333 334 static void mlx4_en_verify_params(void) 335 { 336 if (pfctx > MAX_PFC_TX) { 337 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", 338 pfctx, MAX_PFC_TX); 339 pfctx = 0; 340 } 341 342 if (pfcrx > MAX_PFC_RX) { 343 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", 344 pfcrx, MAX_PFC_RX); 345 pfcrx = 0; 346 } 347 348 if (inline_thold < MIN_PKT_LEN || inline_thold > MAX_INLINE) { 349 pr_warn("mlx4_en: WARNING: illegal module parameter inline_thold %d - should be in range %d-%d, will be changed to default (%d)\n", 350 inline_thold, MIN_PKT_LEN, MAX_INLINE, MAX_INLINE); 351 inline_thold = MAX_INLINE; 352 } 353 } 354 355 static int __init mlx4_en_init(void) 356 { 357 mlx4_en_verify_params(); 358 359 return mlx4_register_interface(&mlx4_en_interface); 360 } 361 362 static void __exit mlx4_en_cleanup(void) 363 { 364 mlx4_unregister_interface(&mlx4_en_interface); 365 } 366 367 module_init(mlx4_en_init); 368 module_exit(mlx4_en_cleanup); 369 370