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