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 = mlx4_low_memory_profile() ? 133 MLX4_EN_MIN_TX_RING_P_UP : 134 min_t(int, num_online_cpus(), MLX4_EN_MAX_TX_RING_P_UP); 135 136 if (params->udp_rss && !(mdev->dev->caps.flags 137 & MLX4_DEV_CAP_FLAG_UDP_RSS)) { 138 mlx4_warn(mdev, "UDP RSS is not supported on this device\n"); 139 params->udp_rss = 0; 140 } 141 for (i = 1; i <= MLX4_MAX_PORTS; i++) { 142 params->prof[i].rx_pause = 1; 143 params->prof[i].rx_ppp = pfcrx; 144 params->prof[i].tx_pause = 1; 145 params->prof[i].tx_ppp = pfctx; 146 params->prof[i].tx_ring_size = MLX4_EN_DEF_TX_RING_SIZE; 147 params->prof[i].rx_ring_size = MLX4_EN_DEF_RX_RING_SIZE; 148 params->prof[i].tx_ring_num = params->num_tx_rings_p_up * 149 MLX4_EN_NUM_UP; 150 params->prof[i].rss_rings = 0; 151 params->prof[i].inline_thold = inline_thold; 152 } 153 154 return 0; 155 } 156 157 static void *mlx4_en_get_netdev(struct mlx4_dev *dev, void *ctx, u8 port) 158 { 159 struct mlx4_en_dev *endev = ctx; 160 161 return endev->pndev[port]; 162 } 163 164 static void mlx4_en_event(struct mlx4_dev *dev, void *endev_ptr, 165 enum mlx4_dev_event event, unsigned long port) 166 { 167 struct mlx4_en_dev *mdev = (struct mlx4_en_dev *) endev_ptr; 168 struct mlx4_en_priv *priv; 169 170 switch (event) { 171 case MLX4_DEV_EVENT_PORT_UP: 172 case MLX4_DEV_EVENT_PORT_DOWN: 173 if (!mdev->pndev[port]) 174 return; 175 priv = netdev_priv(mdev->pndev[port]); 176 /* To prevent races, we poll the link state in a separate 177 task rather than changing it here */ 178 priv->link_state = event; 179 queue_work(mdev->workqueue, &priv->linkstate_task); 180 break; 181 182 case MLX4_DEV_EVENT_CATASTROPHIC_ERROR: 183 mlx4_err(mdev, "Internal error detected, restarting device\n"); 184 break; 185 186 case MLX4_DEV_EVENT_SLAVE_INIT: 187 case MLX4_DEV_EVENT_SLAVE_SHUTDOWN: 188 break; 189 default: 190 if (port < 1 || port > dev->caps.num_ports || 191 !mdev->pndev[port]) 192 return; 193 mlx4_warn(mdev, "Unhandled event %d for port %d\n", event, 194 (int) port); 195 } 196 } 197 198 static void mlx4_en_remove(struct mlx4_dev *dev, void *endev_ptr) 199 { 200 struct mlx4_en_dev *mdev = endev_ptr; 201 int i; 202 203 mutex_lock(&mdev->state_lock); 204 mdev->device_up = false; 205 mutex_unlock(&mdev->state_lock); 206 207 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) 208 if (mdev->pndev[i]) 209 mlx4_en_destroy_netdev(mdev->pndev[i]); 210 211 if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_TS) 212 mlx4_en_remove_timestamp(mdev); 213 214 flush_workqueue(mdev->workqueue); 215 destroy_workqueue(mdev->workqueue); 216 (void) mlx4_mr_free(dev, &mdev->mr); 217 iounmap(mdev->uar_map); 218 mlx4_uar_free(dev, &mdev->priv_uar); 219 mlx4_pd_free(dev, mdev->priv_pdn); 220 kfree(mdev); 221 } 222 223 static void *mlx4_en_add(struct mlx4_dev *dev) 224 { 225 struct mlx4_en_dev *mdev; 226 int i; 227 int err; 228 229 printk_once(KERN_INFO "%s", mlx4_en_version); 230 231 mdev = kzalloc(sizeof(*mdev), GFP_KERNEL); 232 if (!mdev) { 233 err = -ENOMEM; 234 goto err_free_res; 235 } 236 237 if (mlx4_pd_alloc(dev, &mdev->priv_pdn)) 238 goto err_free_dev; 239 240 if (mlx4_uar_alloc(dev, &mdev->priv_uar)) 241 goto err_pd; 242 243 mdev->uar_map = ioremap((phys_addr_t) mdev->priv_uar.pfn << PAGE_SHIFT, 244 PAGE_SIZE); 245 if (!mdev->uar_map) 246 goto err_uar; 247 spin_lock_init(&mdev->uar_lock); 248 249 mdev->dev = dev; 250 mdev->dma_device = &(dev->pdev->dev); 251 mdev->pdev = dev->pdev; 252 mdev->device_up = false; 253 254 mdev->LSO_support = !!(dev->caps.flags & (1 << 15)); 255 if (!mdev->LSO_support) 256 mlx4_warn(mdev, "LSO not supported, please upgrade to later FW version to enable LSO\n"); 257 258 if (mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull, 259 MLX4_PERM_LOCAL_WRITE | MLX4_PERM_LOCAL_READ, 260 0, 0, &mdev->mr)) { 261 mlx4_err(mdev, "Failed allocating memory region\n"); 262 goto err_map; 263 } 264 if (mlx4_mr_enable(mdev->dev, &mdev->mr)) { 265 mlx4_err(mdev, "Failed enabling memory region\n"); 266 goto err_mr; 267 } 268 269 /* Build device profile according to supplied module parameters */ 270 err = mlx4_en_get_profile(mdev); 271 if (err) { 272 mlx4_err(mdev, "Bad module parameters, aborting\n"); 273 goto err_mr; 274 } 275 276 /* Configure which ports to start according to module parameters */ 277 mdev->port_cnt = 0; 278 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) 279 mdev->port_cnt++; 280 281 /* Initialize time stamp mechanism */ 282 if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_TS) 283 mlx4_en_init_timestamp(mdev); 284 285 /* Set default number of RX rings*/ 286 mlx4_en_set_num_rx_rings(mdev); 287 288 /* Create our own workqueue for reset/multicast tasks 289 * Note: we cannot use the shared workqueue because of deadlocks caused 290 * by the rtnl lock */ 291 mdev->workqueue = create_singlethread_workqueue("mlx4_en"); 292 if (!mdev->workqueue) { 293 err = -ENOMEM; 294 goto err_mr; 295 } 296 297 /* At this stage all non-port specific tasks are complete: 298 * mark the card state as up */ 299 mutex_init(&mdev->state_lock); 300 mdev->device_up = true; 301 302 /* Setup ports */ 303 304 /* Create a netdev for each port */ 305 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) { 306 mlx4_info(mdev, "Activating port:%d\n", i); 307 if (mlx4_en_init_netdev(mdev, i, &mdev->profile.prof[i])) 308 mdev->pndev[i] = NULL; 309 } 310 311 return mdev; 312 313 err_mr: 314 (void) mlx4_mr_free(dev, &mdev->mr); 315 err_map: 316 if (mdev->uar_map) 317 iounmap(mdev->uar_map); 318 err_uar: 319 mlx4_uar_free(dev, &mdev->priv_uar); 320 err_pd: 321 mlx4_pd_free(dev, mdev->priv_pdn); 322 err_free_dev: 323 kfree(mdev); 324 err_free_res: 325 return NULL; 326 } 327 328 static struct mlx4_interface mlx4_en_interface = { 329 .add = mlx4_en_add, 330 .remove = mlx4_en_remove, 331 .event = mlx4_en_event, 332 .get_dev = mlx4_en_get_netdev, 333 .protocol = MLX4_PROT_ETH, 334 }; 335 336 static void mlx4_en_verify_params(void) 337 { 338 if (pfctx > MAX_PFC_TX) { 339 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", 340 pfctx, MAX_PFC_TX); 341 pfctx = 0; 342 } 343 344 if (pfcrx > MAX_PFC_RX) { 345 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", 346 pfcrx, MAX_PFC_RX); 347 pfcrx = 0; 348 } 349 350 if (inline_thold < MIN_PKT_LEN || inline_thold > MAX_INLINE) { 351 pr_warn("mlx4_en: WARNING: illegal module parameter inline_thold %d - should be in range %d-%d, will be changed to default (%d)\n", 352 inline_thold, MIN_PKT_LEN, MAX_INLINE, MAX_INLINE); 353 inline_thold = MAX_INLINE; 354 } 355 } 356 357 static int __init mlx4_en_init(void) 358 { 359 mlx4_en_verify_params(); 360 361 return mlx4_register_interface(&mlx4_en_interface); 362 } 363 364 static void __exit mlx4_en_cleanup(void) 365 { 366 mlx4_unregister_interface(&mlx4_en_interface); 367 } 368 369 module_init(mlx4_en_init); 370 module_exit(mlx4_en_cleanup); 371 372