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 #define LINUXKPI_PARAM_PREFIX mlx4_ 35 36 #include <linux/module.h> 37 #include <linux/delay.h> 38 #include <linux/netdevice.h> 39 #include <linux/slab.h> 40 41 #include <dev/mlx4/driver.h> 42 #include <dev/mlx4/device.h> 43 #include <dev/mlx4/cmd.h> 44 45 #include "en.h" 46 47 /* Mellanox ConnectX HCA Ethernet driver */ 48 49 #define MLX4_EN_PARM_INT(X, def_val, desc) \ 50 static unsigned int X = def_val;\ 51 module_param(X , uint, 0444); \ 52 MODULE_PARM_DESC(X, desc); 53 54 55 /* 56 * Device scope module parameters 57 */ 58 59 /* Enable RSS UDP traffic */ 60 MLX4_EN_PARM_INT(udp_rss, 1, 61 "Enable RSS for incoming UDP traffic or disabled (0)"); 62 63 /* Priority pausing */ 64 MLX4_EN_PARM_INT(pfctx, 0, "Priority based Flow Control policy on TX[7:0]." 65 " Per priority bit mask"); 66 MLX4_EN_PARM_INT(pfcrx, 0, "Priority based Flow Control policy on RX[7:0]." 67 " Per priority bit mask"); 68 69 MLX4_EN_PARM_INT(inline_thold, MAX_INLINE, 70 "Threshold for using inline data (range: 17-104, default: 104)"); 71 72 #define MAX_PFC_TX 0xff 73 #define MAX_PFC_RX 0xff 74 75 static int mlx4_en_get_profile(struct mlx4_en_dev *mdev) 76 { 77 struct mlx4_en_profile *params = &mdev->profile; 78 int i; 79 80 params->udp_rss = udp_rss; 81 params->num_tx_rings_p_up = min_t(int, mp_ncpus, 82 MLX4_EN_MAX_TX_RING_P_UP); 83 if (params->udp_rss && !(mdev->dev->caps.flags 84 & MLX4_DEV_CAP_FLAG_UDP_RSS)) { 85 mlx4_warn(mdev, "UDP RSS is not supported on this device.\n"); 86 params->udp_rss = 0; 87 } 88 for (i = 1; i <= MLX4_MAX_PORTS; i++) { 89 params->prof[i].rx_pause = 1; 90 params->prof[i].rx_ppp = pfcrx; 91 params->prof[i].tx_pause = 1; 92 params->prof[i].tx_ppp = pfctx; 93 params->prof[i].tx_ring_size = MLX4_EN_DEF_TX_RING_SIZE; 94 params->prof[i].rx_ring_size = MLX4_EN_DEF_RX_RING_SIZE; 95 params->prof[i].tx_ring_num = params->num_tx_rings_p_up * 96 MLX4_EN_NUM_UP; 97 params->prof[i].rss_rings = 0; 98 params->prof[i].inline_thold = inline_thold; 99 } 100 101 return 0; 102 } 103 104 static void *mlx4_en_get_netdev(struct mlx4_dev *dev, void *ctx, u8 port) 105 { 106 struct mlx4_en_dev *endev = ctx; 107 108 return endev->pndev[port]; 109 } 110 111 static void mlx4_en_event(struct mlx4_dev *dev, void *endev_ptr, 112 enum mlx4_dev_event event, unsigned long port) 113 { 114 struct mlx4_en_dev *mdev = (struct mlx4_en_dev *) endev_ptr; 115 struct mlx4_en_priv *priv; 116 117 switch (event) { 118 case MLX4_DEV_EVENT_PORT_UP: 119 case MLX4_DEV_EVENT_PORT_DOWN: 120 if (!mdev->pndev[port]) 121 return; 122 priv = mlx4_netdev_priv(mdev->pndev[port]); 123 /* To prevent races, we poll the link state in a separate 124 task rather than changing it here */ 125 priv->link_state = event; 126 queue_work(mdev->workqueue, &priv->linkstate_task); 127 break; 128 129 case MLX4_DEV_EVENT_CATASTROPHIC_ERROR: 130 mlx4_err(mdev, "Internal error detected, restarting device\n"); 131 break; 132 133 case MLX4_DEV_EVENT_SLAVE_INIT: 134 case MLX4_DEV_EVENT_SLAVE_SHUTDOWN: 135 break; 136 default: 137 if (port < 1 || port > dev->caps.num_ports || 138 !mdev->pndev[port]) 139 return; 140 mlx4_warn(mdev, "Unhandled event %d for port %d\n", event, 141 (int) port); 142 } 143 } 144 145 static void mlx4_en_remove(struct mlx4_dev *dev, void *endev_ptr) 146 { 147 struct mlx4_en_dev *mdev = endev_ptr; 148 int i; 149 150 mutex_lock(&mdev->state_lock); 151 mdev->device_up = false; 152 mutex_unlock(&mdev->state_lock); 153 154 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) 155 if (mdev->pndev[i]) 156 mlx4_en_destroy_netdev(mdev->pndev[i]); 157 158 flush_workqueue(mdev->workqueue); 159 destroy_workqueue(mdev->workqueue); 160 (void) mlx4_mr_free(dev, &mdev->mr); 161 iounmap(mdev->uar_map); 162 mlx4_uar_free(dev, &mdev->priv_uar); 163 mlx4_pd_free(dev, mdev->priv_pdn); 164 kfree(mdev); 165 } 166 167 static void mlx4_en_activate(struct mlx4_dev *dev, void *ctx) 168 { 169 int i; 170 struct mlx4_en_dev *mdev = ctx; 171 172 /* Create a netdev for each port */ 173 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) { 174 mlx4_info(mdev, "Activating port:%d\n", i); 175 if (mlx4_en_init_netdev(mdev, i, &mdev->profile.prof[i])) 176 mdev->pndev[i] = NULL; 177 } 178 } 179 180 static void *mlx4_en_add(struct mlx4_dev *dev) 181 { 182 struct mlx4_en_dev *mdev; 183 int i; 184 185 mdev = kzalloc(sizeof(*mdev), GFP_KERNEL); 186 if (!mdev) 187 goto err_free_res; 188 189 if (mlx4_pd_alloc(dev, &mdev->priv_pdn)) 190 goto err_free_dev; 191 192 if (mlx4_uar_alloc(dev, &mdev->priv_uar)) 193 goto err_pd; 194 195 mdev->uar_map = ioremap((phys_addr_t) mdev->priv_uar.pfn << PAGE_SHIFT, 196 PAGE_SIZE); 197 if (!mdev->uar_map) 198 goto err_uar; 199 spin_lock_init(&mdev->uar_lock); 200 201 mdev->dev = dev; 202 mdev->dma_device = &dev->persist->pdev->dev; 203 mdev->pdev = dev->persist->pdev; 204 mdev->device_up = false; 205 206 mdev->LSO_support = !!(dev->caps.flags & (1 << 15)); 207 if (!mdev->LSO_support) 208 mlx4_warn(mdev, "LSO not supported, please upgrade to later " 209 "FW version to enable LSO\n"); 210 211 if (mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull, 212 MLX4_PERM_LOCAL_WRITE | MLX4_PERM_LOCAL_READ, 213 0, 0, &mdev->mr)) { 214 mlx4_err(mdev, "Failed allocating memory region\n"); 215 goto err_map; 216 } 217 if (mlx4_mr_enable(mdev->dev, &mdev->mr)) { 218 mlx4_err(mdev, "Failed enabling memory region\n"); 219 goto err_mr; 220 } 221 222 /* Build device profile according to supplied module parameters */ 223 if (mlx4_en_get_profile(mdev)) { 224 mlx4_err(mdev, "Bad module parameters, aborting\n"); 225 goto err_mr; 226 } 227 228 /* Configure which ports to start according to module parameters */ 229 mdev->port_cnt = 0; 230 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) 231 mdev->port_cnt++; 232 233 /* Set default number of RX rings*/ 234 mlx4_en_set_num_rx_rings(mdev); 235 236 /* Create our own workqueue for reset/multicast tasks 237 * Note: we cannot use the shared workqueue because of deadlocks caused 238 * by the rtnl lock */ 239 mdev->workqueue = create_singlethread_workqueue("mlx4_en"); 240 if (!mdev->workqueue) 241 goto err_mr; 242 243 /* At this stage all non-port specific tasks are complete: 244 * mark the card state as up */ 245 mutex_init(&mdev->state_lock); 246 mdev->device_up = true; 247 248 return mdev; 249 250 err_mr: 251 (void) mlx4_mr_free(dev, &mdev->mr); 252 err_map: 253 if (mdev->uar_map) 254 iounmap(mdev->uar_map); 255 err_uar: 256 mlx4_uar_free(dev, &mdev->priv_uar); 257 err_pd: 258 mlx4_pd_free(dev, mdev->priv_pdn); 259 err_free_dev: 260 kfree(mdev); 261 err_free_res: 262 return NULL; 263 } 264 265 static struct mlx4_interface mlx4_en_interface = { 266 .add = mlx4_en_add, 267 .remove = mlx4_en_remove, 268 .event = mlx4_en_event, 269 .get_dev = mlx4_en_get_netdev, 270 .protocol = MLX4_PROT_ETH, 271 .activate = mlx4_en_activate, 272 }; 273 274 static void mlx4_en_verify_params(void) 275 { 276 if (pfctx > MAX_PFC_TX) { 277 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", 278 pfctx, MAX_PFC_TX); 279 pfctx = 0; 280 } 281 282 if (pfcrx > MAX_PFC_RX) { 283 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", 284 pfcrx, MAX_PFC_RX); 285 pfcrx = 0; 286 } 287 288 if (inline_thold < MIN_PKT_LEN || inline_thold > MAX_INLINE) { 289 pr_warn("mlx4_en: WARNING: illegal module parameter inline_thold %d - should be in range %d-%d, will be changed to default (%d)\n", 290 inline_thold, MIN_PKT_LEN, MAX_INLINE, MAX_INLINE); 291 inline_thold = MAX_INLINE; 292 } 293 } 294 295 static int __init mlx4_en_init(void) 296 { 297 mlx4_en_verify_params(); 298 299 return mlx4_register_interface(&mlx4_en_interface); 300 } 301 302 static void __exit mlx4_en_cleanup(void) 303 { 304 mlx4_unregister_interface(&mlx4_en_interface); 305 } 306 307 module_init_order(mlx4_en_init, SI_ORDER_SIXTH); 308 module_exit_order(mlx4_en_cleanup, SI_ORDER_SIXTH); 309 310 static int 311 mlx4en_evhand(module_t mod, int event, void *arg) 312 { 313 return (0); 314 } 315 static moduledata_t mlx4en_mod = { 316 .name = "mlx4en", 317 .evhand = mlx4en_evhand, 318 }; 319 DECLARE_MODULE(mlx4en, mlx4en_mod, SI_SUB_OFED_PREINIT, SI_ORDER_ANY); 320 MODULE_DEPEND(mlx4en, mlx4, 1, 1, 1); 321 MODULE_DEPEND(mlx4en, linuxkpi, 1, 1, 1); 322