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 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 priv->flags &= ~(MLX4_EN_FLAG_RX_FILTER_NEEDED| 107 MLX4_EN_FLAG_ENABLE_HW_LOOPBACK); 108 109 /* Drop the packet if SRIOV is not enabled 110 * and not performing the selftest or flb disabled 111 */ 112 if (mlx4_is_mfunc(priv->mdev->dev) && 113 !(features & NETIF_F_LOOPBACK) && !priv->validate_loopback) 114 priv->flags |= MLX4_EN_FLAG_RX_FILTER_NEEDED; 115 116 /* Set dmac in Tx WQE if we are in SRIOV mode or if loopback selftest 117 * is requested 118 */ 119 if (mlx4_is_mfunc(priv->mdev->dev) || priv->validate_loopback) 120 priv->flags |= MLX4_EN_FLAG_ENABLE_HW_LOOPBACK; 121 } 122 123 static int mlx4_en_get_profile(struct mlx4_en_dev *mdev) 124 { 125 struct mlx4_en_profile *params = &mdev->profile; 126 int i; 127 128 params->udp_rss = udp_rss; 129 params->num_tx_rings_p_up = mlx4_low_memory_profile() ? 130 MLX4_EN_MIN_TX_RING_P_UP : 131 min_t(int, num_online_cpus(), MLX4_EN_MAX_TX_RING_P_UP); 132 133 if (params->udp_rss && !(mdev->dev->caps.flags 134 & MLX4_DEV_CAP_FLAG_UDP_RSS)) { 135 mlx4_warn(mdev, "UDP RSS is not supported on this device\n"); 136 params->udp_rss = 0; 137 } 138 for (i = 1; i <= MLX4_MAX_PORTS; i++) { 139 params->prof[i].rx_pause = 1; 140 params->prof[i].rx_ppp = pfcrx; 141 params->prof[i].tx_pause = 1; 142 params->prof[i].tx_ppp = pfctx; 143 params->prof[i].tx_ring_size = MLX4_EN_DEF_TX_RING_SIZE; 144 params->prof[i].rx_ring_size = MLX4_EN_DEF_RX_RING_SIZE; 145 params->prof[i].tx_ring_num = params->num_tx_rings_p_up * 146 MLX4_EN_NUM_UP; 147 params->prof[i].rss_rings = 0; 148 params->prof[i].inline_thold = inline_thold; 149 } 150 151 return 0; 152 } 153 154 static void *mlx4_en_get_netdev(struct mlx4_dev *dev, void *ctx, u8 port) 155 { 156 struct mlx4_en_dev *endev = ctx; 157 158 return endev->pndev[port]; 159 } 160 161 static void mlx4_en_event(struct mlx4_dev *dev, void *endev_ptr, 162 enum mlx4_dev_event event, unsigned long port) 163 { 164 struct mlx4_en_dev *mdev = (struct mlx4_en_dev *) endev_ptr; 165 struct mlx4_en_priv *priv; 166 167 switch (event) { 168 case MLX4_DEV_EVENT_PORT_UP: 169 case MLX4_DEV_EVENT_PORT_DOWN: 170 if (!mdev->pndev[port]) 171 return; 172 priv = netdev_priv(mdev->pndev[port]); 173 /* To prevent races, we poll the link state in a separate 174 task rather than changing it here */ 175 priv->link_state = event; 176 queue_work(mdev->workqueue, &priv->linkstate_task); 177 break; 178 179 case MLX4_DEV_EVENT_CATASTROPHIC_ERROR: 180 mlx4_err(mdev, "Internal error detected, restarting device\n"); 181 break; 182 183 case MLX4_DEV_EVENT_SLAVE_INIT: 184 case MLX4_DEV_EVENT_SLAVE_SHUTDOWN: 185 break; 186 default: 187 if (port < 1 || port > dev->caps.num_ports || 188 !mdev->pndev[port]) 189 return; 190 mlx4_warn(mdev, "Unhandled event %d for port %d\n", event, 191 (int) port); 192 } 193 } 194 195 static void mlx4_en_remove(struct mlx4_dev *dev, void *endev_ptr) 196 { 197 struct mlx4_en_dev *mdev = endev_ptr; 198 int i; 199 200 mutex_lock(&mdev->state_lock); 201 mdev->device_up = false; 202 mutex_unlock(&mdev->state_lock); 203 204 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) 205 if (mdev->pndev[i]) 206 mlx4_en_destroy_netdev(mdev->pndev[i]); 207 208 if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_TS) 209 mlx4_en_remove_timestamp(mdev); 210 211 flush_workqueue(mdev->workqueue); 212 destroy_workqueue(mdev->workqueue); 213 (void) mlx4_mr_free(dev, &mdev->mr); 214 iounmap(mdev->uar_map); 215 mlx4_uar_free(dev, &mdev->priv_uar); 216 mlx4_pd_free(dev, mdev->priv_pdn); 217 kfree(mdev); 218 } 219 220 static void *mlx4_en_add(struct mlx4_dev *dev) 221 { 222 struct mlx4_en_dev *mdev; 223 int i; 224 225 printk_once(KERN_INFO "%s", mlx4_en_version); 226 227 mdev = kzalloc(sizeof(*mdev), GFP_KERNEL); 228 if (!mdev) 229 goto err_free_res; 230 231 if (mlx4_pd_alloc(dev, &mdev->priv_pdn)) 232 goto err_free_dev; 233 234 if (mlx4_uar_alloc(dev, &mdev->priv_uar)) 235 goto err_pd; 236 237 mdev->uar_map = ioremap((phys_addr_t) mdev->priv_uar.pfn << PAGE_SHIFT, 238 PAGE_SIZE); 239 if (!mdev->uar_map) 240 goto err_uar; 241 spin_lock_init(&mdev->uar_lock); 242 243 mdev->dev = dev; 244 mdev->dma_device = &dev->persist->pdev->dev; 245 mdev->pdev = dev->persist->pdev; 246 mdev->device_up = false; 247 248 mdev->LSO_support = !!(dev->caps.flags & (1 << 15)); 249 if (!mdev->LSO_support) 250 mlx4_warn(mdev, "LSO not supported, please upgrade to later FW version to enable LSO\n"); 251 252 if (mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull, 253 MLX4_PERM_LOCAL_WRITE | MLX4_PERM_LOCAL_READ, 254 0, 0, &mdev->mr)) { 255 mlx4_err(mdev, "Failed allocating memory region\n"); 256 goto err_map; 257 } 258 if (mlx4_mr_enable(mdev->dev, &mdev->mr)) { 259 mlx4_err(mdev, "Failed enabling memory region\n"); 260 goto err_mr; 261 } 262 263 /* Build device profile according to supplied module parameters */ 264 if (mlx4_en_get_profile(mdev)) { 265 mlx4_err(mdev, "Bad module parameters, aborting\n"); 266 goto err_mr; 267 } 268 269 /* Configure which ports to start according to module parameters */ 270 mdev->port_cnt = 0; 271 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) 272 mdev->port_cnt++; 273 274 /* Initialize time stamp mechanism */ 275 if (mdev->dev->caps.flags2 & MLX4_DEV_CAP_FLAG2_TS) 276 mlx4_en_init_timestamp(mdev); 277 278 /* Set default number of RX rings*/ 279 mlx4_en_set_num_rx_rings(mdev); 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 goto err_mr; 287 288 /* At this stage all non-port specific tasks are complete: 289 * mark the card state as up */ 290 mutex_init(&mdev->state_lock); 291 mdev->device_up = true; 292 293 /* Setup ports */ 294 295 /* Create a netdev for each port */ 296 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) { 297 mlx4_info(mdev, "Activating port:%d\n", i); 298 if (mlx4_en_init_netdev(mdev, i, &mdev->profile.prof[i])) 299 mdev->pndev[i] = NULL; 300 } 301 302 return mdev; 303 304 err_mr: 305 (void) mlx4_mr_free(dev, &mdev->mr); 306 err_map: 307 if (mdev->uar_map) 308 iounmap(mdev->uar_map); 309 err_uar: 310 mlx4_uar_free(dev, &mdev->priv_uar); 311 err_pd: 312 mlx4_pd_free(dev, mdev->priv_pdn); 313 err_free_dev: 314 kfree(mdev); 315 err_free_res: 316 return NULL; 317 } 318 319 static struct mlx4_interface mlx4_en_interface = { 320 .add = mlx4_en_add, 321 .remove = mlx4_en_remove, 322 .event = mlx4_en_event, 323 .get_dev = mlx4_en_get_netdev, 324 .protocol = MLX4_PROT_ETH, 325 }; 326 327 static void mlx4_en_verify_params(void) 328 { 329 if (pfctx > MAX_PFC_TX) { 330 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", 331 pfctx, MAX_PFC_TX); 332 pfctx = 0; 333 } 334 335 if (pfcrx > MAX_PFC_RX) { 336 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", 337 pfcrx, MAX_PFC_RX); 338 pfcrx = 0; 339 } 340 341 if (inline_thold < MIN_PKT_LEN || inline_thold > MAX_INLINE) { 342 pr_warn("mlx4_en: WARNING: illegal module parameter inline_thold %d - should be in range %d-%d, will be changed to default (%d)\n", 343 inline_thold, MIN_PKT_LEN, MAX_INLINE, MAX_INLINE); 344 inline_thold = MAX_INLINE; 345 } 346 } 347 348 static int __init mlx4_en_init(void) 349 { 350 mlx4_en_verify_params(); 351 352 return mlx4_register_interface(&mlx4_en_interface); 353 } 354 355 static void __exit mlx4_en_cleanup(void) 356 { 357 mlx4_unregister_interface(&mlx4_en_interface); 358 } 359 360 module_init(mlx4_en_init); 361 module_exit(mlx4_en_cleanup); 362 363