en_main.c revision 279731
1/* 2 * Copyright (c) 2007, 2014 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/module.h> 35#include <linux/delay.h> 36#include <linux/netdevice.h> 37#include <linux/slab.h> 38 39#include <linux/mlx4/driver.h> 40#include <linux/mlx4/device.h> 41#include <linux/mlx4/cmd.h> 42 43#include "mlx4_en.h" 44 45MODULE_AUTHOR("Liran Liss, Yevgeny Petrilin"); 46MODULE_DESCRIPTION("Mellanox ConnectX HCA Ethernet driver"); 47MODULE_LICENSE("Dual BSD/GPL"); 48MODULE_VERSION(DRV_VERSION " ("DRV_RELDATE")"); 49 50static const char mlx4_en_version[] = 51 DRV_NAME ": Mellanox ConnectX HCA Ethernet driver v" 52 DRV_VERSION " (" DRV_RELDATE ")\n"; 53 54#define MLX4_EN_PARM_INT(X, def_val, desc) \ 55 static unsigned int X = def_val;\ 56 module_param(X , uint, 0444); \ 57 MODULE_PARM_DESC(X, desc); 58 59 60/* 61 * Device scope module parameters 62 */ 63 64/* Enable RSS UDP traffic */ 65MLX4_EN_PARM_INT(udp_rss, 1, 66 "Enable RSS for incoming UDP traffic"); 67 68/* Priority pausing */ 69MLX4_EN_PARM_INT(pfctx, 0, "Priority based Flow Control policy on TX[7:0]." 70 " Per priority bit mask"); 71MLX4_EN_PARM_INT(pfcrx, 0, "Priority based Flow Control policy on RX[7:0]." 72 " Per priority bit mask"); 73 74#define MAX_PFC_TX 0xff 75#define MAX_PFC_RX 0xff 76 77 78static int mlx4_en_get_profile(struct mlx4_en_dev *mdev) 79{ 80 struct mlx4_en_profile *params = &mdev->profile; 81 int i; 82 83 params->udp_rss = udp_rss; 84 params->num_tx_rings_p_up = min_t(int, mp_ncpus, 85 MLX4_EN_MAX_TX_RING_P_UP); 86 if (params->udp_rss && !(mdev->dev->caps.flags 87 & MLX4_DEV_CAP_FLAG_UDP_RSS)) { 88 mlx4_warn(mdev, "UDP RSS is not supported on this device.\n"); 89 params->udp_rss = 0; 90 } 91 for (i = 1; i <= MLX4_MAX_PORTS; i++) { 92 params->prof[i].rx_pause = 1; 93 params->prof[i].rx_ppp = pfcrx; 94 params->prof[i].tx_pause = 1; 95 params->prof[i].tx_ppp = pfctx; 96 params->prof[i].tx_ring_size = MLX4_EN_DEF_TX_RING_SIZE; 97 params->prof[i].rx_ring_size = MLX4_EN_DEF_RX_RING_SIZE; 98 params->prof[i].tx_ring_num = params->num_tx_rings_p_up * 99 MLX4_EN_NUM_UP; 100 params->prof[i].rss_rings = 0; 101 } 102 103 return 0; 104} 105 106static void *mlx4_en_get_netdev(struct mlx4_dev *dev, void *ctx, u8 port) 107{ 108 struct mlx4_en_dev *endev = ctx; 109 110 return endev->pndev[port]; 111} 112 113static void mlx4_en_event(struct mlx4_dev *dev, void *endev_ptr, 114 enum mlx4_dev_event event, unsigned long port) 115{ 116 struct mlx4_en_dev *mdev = (struct mlx4_en_dev *) endev_ptr; 117 struct mlx4_en_priv *priv; 118 119 switch (event) { 120 case MLX4_DEV_EVENT_PORT_UP: 121 case MLX4_DEV_EVENT_PORT_DOWN: 122 if (!mdev->pndev[port]) 123 return; 124 priv = netdev_priv(mdev->pndev[port]); 125 /* To prevent races, we poll the link state in a separate 126 task rather than changing it here */ 127 priv->link_state = event; 128 queue_work(mdev->workqueue, &priv->linkstate_task); 129 break; 130 131 case MLX4_DEV_EVENT_CATASTROPHIC_ERROR: 132 mlx4_err(mdev, "Internal error detected, restarting device\n"); 133 break; 134 135 case MLX4_DEV_EVENT_SLAVE_INIT: 136 case MLX4_DEV_EVENT_SLAVE_SHUTDOWN: 137 break; 138 default: 139 if (port < 1 || port > dev->caps.num_ports || 140 !mdev->pndev[port]) 141 return; 142 mlx4_warn(mdev, "Unhandled event %d for port %d\n", event, 143 (int) port); 144 } 145} 146 147static void mlx4_en_remove(struct mlx4_dev *dev, void *endev_ptr) 148{ 149 struct mlx4_en_dev *mdev = endev_ptr; 150 int i, ret; 151 152 mutex_lock(&mdev->state_lock); 153 mdev->device_up = false; 154 mutex_unlock(&mdev->state_lock); 155 156 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) 157 if (mdev->pndev[i]) 158 mlx4_en_destroy_netdev(mdev->pndev[i]); 159 160 flush_workqueue(mdev->workqueue); 161 destroy_workqueue(mdev->workqueue); 162 ret = mlx4_mr_free(dev, &mdev->mr); 163 if (ret) 164 mlx4_err(mdev, "Error deregistering MR. The system may have become unstable."); 165 iounmap(mdev->uar_map); 166 mlx4_uar_free(dev, &mdev->priv_uar); 167 mlx4_pd_free(dev, mdev->priv_pdn); 168 kfree(mdev); 169} 170 171static void *mlx4_en_add(struct mlx4_dev *dev) 172{ 173 struct mlx4_en_dev *mdev; 174 int i; 175 int err; 176 177 printk_once(KERN_INFO "%s", mlx4_en_version); 178 179 mdev = kzalloc(sizeof *mdev, GFP_KERNEL); 180 if (!mdev) { 181 dev_err(&dev->pdev->dev, "Device struct alloc failed, " 182 "aborting.\n"); 183 err = -ENOMEM; 184 goto err_free_res; 185 } 186 187 if (mlx4_pd_alloc(dev, &mdev->priv_pdn)) 188 goto err_free_dev; 189 190 if (mlx4_uar_alloc(dev, &mdev->priv_uar)) 191 goto err_pd; 192 193 mdev->uar_map = ioremap((phys_addr_t) mdev->priv_uar.pfn << PAGE_SHIFT, 194 PAGE_SIZE); 195 if (!mdev->uar_map) 196 goto err_uar; 197 spin_lock_init(&mdev->uar_lock); 198 199 mdev->dev = dev; 200 mdev->dma_device = &(dev->pdev->dev); 201 mdev->pdev = dev->pdev; 202 mdev->device_up = false; 203 204 mdev->LSO_support = !!(dev->caps.flags & (1 << 15)); 205 if (!mdev->LSO_support) 206 mlx4_warn(mdev, "LSO not supported, please upgrade to later " 207 "FW version to enable LSO\n"); 208 209 if (mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull, 210 MLX4_PERM_LOCAL_WRITE | MLX4_PERM_LOCAL_READ, 211 0, 0, &mdev->mr)) { 212 mlx4_err(mdev, "Failed allocating memory region\n"); 213 goto err_map; 214 } 215 if (mlx4_mr_enable(mdev->dev, &mdev->mr)) { 216 mlx4_err(mdev, "Failed enabling memory region\n"); 217 goto err_mr; 218 } 219 220 /* Build device profile according to supplied module parameters */ 221 err = mlx4_en_get_profile(mdev); 222 if (err) { 223 mlx4_err(mdev, "Bad module parameters, aborting.\n"); 224 goto err_mr; 225 } 226 227 /* Configure which ports to start according to module parameters */ 228 mdev->port_cnt = 0; 229 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) 230 mdev->port_cnt++; 231 232 233 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) { 234 if (!dev->caps.comp_pool) { 235 mdev->profile.prof[i].rx_ring_num = 236 rounddown_pow_of_two(max_t(int, MIN_RX_RINGS, 237 min_t(int, 238 dev->caps.num_comp_vectors, 239 DEF_RX_RINGS))); 240 } else { 241 mdev->profile.prof[i].rx_ring_num = rounddown_pow_of_two( 242 min_t(int, dev->caps.comp_pool / 243 dev->caps.num_ports, MAX_MSIX_P_PORT)); 244 } 245 } 246 247 /* Create our own workqueue for reset/multicast tasks 248 * Note: we cannot use the shared workqueue because of deadlocks caused 249 * by the rtnl lock */ 250 mdev->workqueue = create_singlethread_workqueue("mlx4_en"); 251 if (!mdev->workqueue) { 252 err = -ENOMEM; 253 goto err_mr; 254 } 255 256 /* At this stage all non-port specific tasks are complete: 257 * mark the card state as up */ 258 mutex_init(&mdev->state_lock); 259 mdev->device_up = true; 260 261 /* Setup ports */ 262 263 /* Create a netdev for each port */ 264 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) { 265 mlx4_info(mdev, "Activating port:%d\n", i); 266 if (mlx4_en_init_netdev(mdev, i, &mdev->profile.prof[i])) 267 mdev->pndev[i] = NULL; 268 } 269 270 return mdev; 271 272err_mr: 273 err = mlx4_mr_free(dev, &mdev->mr); 274 if (err) 275 mlx4_err(mdev, "Error deregistering MR. The system may have become unstable."); 276err_map: 277 if (mdev->uar_map) 278 iounmap(mdev->uar_map); 279err_uar: 280 mlx4_uar_free(dev, &mdev->priv_uar); 281err_pd: 282 mlx4_pd_free(dev, mdev->priv_pdn); 283err_free_dev: 284 kfree(mdev); 285err_free_res: 286 return NULL; 287} 288 289static struct mlx4_interface mlx4_en_interface = { 290 .add = mlx4_en_add, 291 .remove = mlx4_en_remove, 292 .event = mlx4_en_event, 293 .get_dev = mlx4_en_get_netdev, 294 .protocol = MLX4_PROT_ETH, 295}; 296 297static void mlx4_en_verify_params(void) 298{ 299 if (pfctx > MAX_PFC_TX) { 300 pr_warn("mlx4_en: WARNING: illegal module parameter pfctx 0x%x - " 301 "should be in range 0-0x%x, will be changed to default (0)\n", 302 pfctx, MAX_PFC_TX); 303 pfctx = 0; 304 } 305 306 if (pfcrx > MAX_PFC_RX) { 307 pr_warn("mlx4_en: WARNING: illegal module parameter pfcrx 0x%x - " 308 "should be in range 0-0x%x, will be changed to default (0)\n", 309 pfcrx, MAX_PFC_RX); 310 pfcrx = 0; 311 } 312} 313 314 315static int __init mlx4_en_init(void) 316{ 317 mlx4_en_verify_params(); 318 319#ifdef CONFIG_DEBUG_FS 320 int err = 0; 321 err = mlx4_en_register_debugfs(); 322 if (err) 323 pr_err(KERN_ERR "Failed to register debugfs\n"); 324#endif 325 return mlx4_register_interface(&mlx4_en_interface); 326} 327 328static void __exit mlx4_en_cleanup(void) 329{ 330 mlx4_unregister_interface(&mlx4_en_interface); 331#ifdef CONFIG_DEBUG_FS 332 mlx4_en_unregister_debugfs(); 333#endif 334} 335 336module_init(mlx4_en_init); 337module_exit(mlx4_en_cleanup); 338 339#undef MODULE_VERSION 340#include <sys/module.h> 341static int 342mlxen_evhand(module_t mod, int event, void *arg) 343{ 344 return (0); 345} 346static moduledata_t mlxen_mod = { 347 .name = "mlxen", 348 .evhand = mlxen_evhand, 349}; 350DECLARE_MODULE(mlxen, mlxen_mod, SI_SUB_OFED_PREINIT, SI_ORDER_ANY); 351MODULE_DEPEND(mlxen, mlx4, 1, 1, 1); 352