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 if (params->udp_rss && !(mdev->dev->caps.flags 105 & MLX4_DEV_CAP_FLAG_UDP_RSS)) { 106 mlx4_warn(mdev, "UDP RSS is not supported on this device.\n"); 107 params->udp_rss = 0; 108 } 109 for (i = 1; i <= MLX4_MAX_PORTS; i++) { 110 params->prof[i].rx_pause = 1; 111 params->prof[i].rx_ppp = pfcrx; 112 params->prof[i].tx_pause = 1; 113 params->prof[i].tx_ppp = pfctx; 114 params->prof[i].tx_ring_size = MLX4_EN_DEF_TX_RING_SIZE; 115 params->prof[i].rx_ring_size = MLX4_EN_DEF_RX_RING_SIZE; 116 params->prof[i].tx_ring_num = MLX4_EN_NUM_TX_RINGS + 117 (!!pfcrx) * MLX4_EN_NUM_PPP_RINGS; 118 params->prof[i].rss_rings = 0; 119 } 120 121 return 0; 122 } 123 124 static void *mlx4_en_get_netdev(struct mlx4_dev *dev, void *ctx, u8 port) 125 { 126 struct mlx4_en_dev *endev = ctx; 127 128 return endev->pndev[port]; 129 } 130 131 static void mlx4_en_event(struct mlx4_dev *dev, void *endev_ptr, 132 enum mlx4_dev_event event, int port) 133 { 134 struct mlx4_en_dev *mdev = (struct mlx4_en_dev *) endev_ptr; 135 struct mlx4_en_priv *priv; 136 137 if (!mdev->pndev[port]) 138 return; 139 140 priv = netdev_priv(mdev->pndev[port]); 141 switch (event) { 142 case MLX4_DEV_EVENT_PORT_UP: 143 case MLX4_DEV_EVENT_PORT_DOWN: 144 /* To prevent races, we poll the link state in a separate 145 task rather than changing it here */ 146 priv->link_state = event; 147 queue_work(mdev->workqueue, &priv->linkstate_task); 148 break; 149 150 case MLX4_DEV_EVENT_CATASTROPHIC_ERROR: 151 mlx4_err(mdev, "Internal error detected, restarting device\n"); 152 break; 153 154 default: 155 mlx4_warn(mdev, "Unhandled event: %d\n", event); 156 } 157 } 158 159 static void mlx4_en_remove(struct mlx4_dev *dev, void *endev_ptr) 160 { 161 struct mlx4_en_dev *mdev = endev_ptr; 162 int i; 163 164 mutex_lock(&mdev->state_lock); 165 mdev->device_up = false; 166 mutex_unlock(&mdev->state_lock); 167 168 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) 169 if (mdev->pndev[i]) 170 mlx4_en_destroy_netdev(mdev->pndev[i]); 171 172 flush_workqueue(mdev->workqueue); 173 destroy_workqueue(mdev->workqueue); 174 mlx4_mr_free(dev, &mdev->mr); 175 iounmap(mdev->uar_map); 176 mlx4_uar_free(dev, &mdev->priv_uar); 177 mlx4_pd_free(dev, mdev->priv_pdn); 178 kfree(mdev); 179 } 180 181 static void *mlx4_en_add(struct mlx4_dev *dev) 182 { 183 struct mlx4_en_dev *mdev; 184 int i; 185 int err; 186 187 printk_once(KERN_INFO "%s", mlx4_en_version); 188 189 mdev = kzalloc(sizeof *mdev, GFP_KERNEL); 190 if (!mdev) { 191 dev_err(&dev->pdev->dev, "Device struct alloc failed, " 192 "aborting.\n"); 193 err = -ENOMEM; 194 goto err_free_res; 195 } 196 197 if (mlx4_pd_alloc(dev, &mdev->priv_pdn)) 198 goto err_free_dev; 199 200 if (mlx4_uar_alloc(dev, &mdev->priv_uar)) 201 goto err_pd; 202 203 mdev->uar_map = ioremap((phys_addr_t) mdev->priv_uar.pfn << PAGE_SHIFT, 204 PAGE_SIZE); 205 if (!mdev->uar_map) 206 goto err_uar; 207 spin_lock_init(&mdev->uar_lock); 208 209 mdev->dev = dev; 210 mdev->dma_device = &(dev->pdev->dev); 211 mdev->pdev = dev->pdev; 212 mdev->device_up = false; 213 214 mdev->LSO_support = !!(dev->caps.flags & (1 << 15)); 215 if (!mdev->LSO_support) 216 mlx4_warn(mdev, "LSO not supported, please upgrade to later " 217 "FW version to enable LSO\n"); 218 219 if (mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull, 220 MLX4_PERM_LOCAL_WRITE | MLX4_PERM_LOCAL_READ, 221 0, 0, &mdev->mr)) { 222 mlx4_err(mdev, "Failed allocating memory region\n"); 223 goto err_map; 224 } 225 if (mlx4_mr_enable(mdev->dev, &mdev->mr)) { 226 mlx4_err(mdev, "Failed enabling memory region\n"); 227 goto err_mr; 228 } 229 230 /* Build device profile according to supplied module parameters */ 231 err = mlx4_en_get_profile(mdev); 232 if (err) { 233 mlx4_err(mdev, "Bad module parameters, aborting.\n"); 234 goto err_mr; 235 } 236 237 /* Configure which ports to start according to module parameters */ 238 mdev->port_cnt = 0; 239 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) 240 mdev->port_cnt++; 241 242 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) { 243 if (!dev->caps.comp_pool) { 244 mdev->profile.prof[i].rx_ring_num = 245 rounddown_pow_of_two(max_t(int, MIN_RX_RINGS, 246 min_t(int, 247 dev->caps.num_comp_vectors, 248 MAX_RX_RINGS))); 249 } else { 250 mdev->profile.prof[i].rx_ring_num = rounddown_pow_of_two( 251 min_t(int, dev->caps.comp_pool/ 252 dev->caps.num_ports - 1 , MAX_MSIX_P_PORT - 1)); 253 } 254 } 255 256 /* Create our own workqueue for reset/multicast tasks 257 * Note: we cannot use the shared workqueue because of deadlocks caused 258 * by the rtnl lock */ 259 mdev->workqueue = create_singlethread_workqueue("mlx4_en"); 260 if (!mdev->workqueue) { 261 err = -ENOMEM; 262 goto err_mr; 263 } 264 265 /* At this stage all non-port specific tasks are complete: 266 * mark the card state as up */ 267 mutex_init(&mdev->state_lock); 268 mdev->device_up = true; 269 270 /* Setup ports */ 271 272 /* Create a netdev for each port */ 273 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) { 274 mlx4_info(mdev, "Activating port:%d\n", i); 275 if (mlx4_en_init_netdev(mdev, i, &mdev->profile.prof[i])) 276 mdev->pndev[i] = NULL; 277 } 278 return mdev; 279 280 err_mr: 281 mlx4_mr_free(dev, &mdev->mr); 282 err_map: 283 if (!mdev->uar_map) 284 iounmap(mdev->uar_map); 285 err_uar: 286 mlx4_uar_free(dev, &mdev->priv_uar); 287 err_pd: 288 mlx4_pd_free(dev, mdev->priv_pdn); 289 err_free_dev: 290 kfree(mdev); 291 err_free_res: 292 return NULL; 293 } 294 295 static struct mlx4_interface mlx4_en_interface = { 296 .add = mlx4_en_add, 297 .remove = mlx4_en_remove, 298 .event = mlx4_en_event, 299 .get_dev = mlx4_en_get_netdev, 300 .protocol = MLX4_PROT_ETH, 301 }; 302 303 static int __init mlx4_en_init(void) 304 { 305 return mlx4_register_interface(&mlx4_en_interface); 306 } 307 308 static void __exit mlx4_en_cleanup(void) 309 { 310 mlx4_unregister_interface(&mlx4_en_interface); 311 } 312 313 module_init(mlx4_en_init); 314 module_exit(mlx4_en_cleanup); 315 316