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/module.h> 35#include <linux/delay.h> 36#include <linux/netdevice.h> 37 38#include <linux/mlx4/driver.h> 39#include <linux/mlx4/device.h> 40#include <linux/mlx4/cmd.h> 41 42#include "mlx4_en.h" 43 44MODULE_AUTHOR("Liran Liss, Yevgeny Petrilin"); 45MODULE_DESCRIPTION("Mellanox ConnectX HCA Ethernet driver"); 46MODULE_LICENSE("Dual BSD/GPL"); 47MODULE_VERSION(DRV_VERSION " ("DRV_RELDATE")"); 48 49static const char mlx4_en_version[] = 50 DRV_NAME ": Mellanox ConnectX HCA Ethernet driver v" 51 DRV_VERSION " (" DRV_RELDATE ")\n"; 52 53#define MLX4_EN_PARM_INT(X, def_val, desc) \ 54 static unsigned int X = def_val;\ 55 module_param(X , uint, 0444); \ 56 MODULE_PARM_DESC(X, desc); 57 58 59/* 60 * Device scope module parameters 61 */ 62 63 64/* Enable RSS TCP traffic */ 65MLX4_EN_PARM_INT(tcp_rss, 1, 66 "Enable RSS for incomming TCP traffic or disabled (0)"); 67/* Enable RSS UDP traffic */ 68MLX4_EN_PARM_INT(udp_rss, 1, 69 "Enable RSS for incomming UDP traffic or disabled (0)"); 70 71/* Number of LRO sessions per Rx ring (rounded up to a power of two) */ 72MLX4_EN_PARM_INT(num_lro, MLX4_EN_MAX_LRO_DESCRIPTORS, 73 "Number of LRO sessions per ring or disabled (0)"); 74 75/* Allow reassembly of fragmented IP packets */ 76MLX4_EN_PARM_INT(ip_reasm, 1, "Allow reassembly of fragmented IP packets (!0)"); 77 78/* Priority pausing */ 79MLX4_EN_PARM_INT(pfctx, 0, "Priority based Flow Control policy on TX[7:0]." 80 " Per priority bit mask"); 81MLX4_EN_PARM_INT(pfcrx, 0, "Priority based Flow Control policy on RX[7:0]." 82 " Per priority bit mask"); 83 84static int mlx4_en_get_profile(struct mlx4_en_dev *mdev) 85{ 86 struct mlx4_en_profile *params = &mdev->profile; 87 int i; 88 89 params->tcp_rss = tcp_rss; 90 params->udp_rss = udp_rss; 91 if (params->udp_rss && !(mdev->dev->caps.flags 92 & MLX4_DEV_CAP_FLAG_UDP_RSS)) { 93 mlx4_warn(mdev, "UDP RSS is not supported on this device.\n"); 94 params->udp_rss = 0; 95 } 96 params->num_lro = min_t(int, num_lro , MLX4_EN_MAX_LRO_DESCRIPTORS); 97 params->ip_reasm = ip_reasm; 98 for (i = 1; i <= MLX4_MAX_PORTS; i++) { 99 params->prof[i].rx_pause = 1; 100 params->prof[i].rx_ppp = pfcrx; 101 params->prof[i].tx_pause = 1; 102 params->prof[i].tx_ppp = pfctx; 103 params->prof[i].tx_ring_size = MLX4_EN_DEF_TX_RING_SIZE; 104 params->prof[i].rx_ring_size = MLX4_EN_DEF_RX_RING_SIZE; 105 params->prof[i].tx_ring_num = MLX4_EN_NUM_HASH_RINGS + 1 + 106 (!!pfcrx) * MLX4_EN_NUM_PPP_RINGS; 107 } 108 109 return 0; 110} 111 112static void *get_netdev(struct mlx4_dev *dev, void *ctx, u8 port) 113{ 114 struct mlx4_en_dev *endev = ctx; 115 116 return endev->pndev[port]; 117} 118 119static void mlx4_en_event(struct mlx4_dev *dev, void *endev_ptr, 120 enum mlx4_dev_event event, unsigned long port) 121{ 122 struct mlx4_en_dev *mdev = (struct mlx4_en_dev *) endev_ptr; 123 struct mlx4_en_priv *priv; 124 125 switch (event) { 126 case MLX4_DEV_EVENT_PORT_UP: 127 case MLX4_DEV_EVENT_PORT_DOWN: 128 if (!mdev->pndev[port]) 129 return; 130 priv = netdev_priv(mdev->pndev[port]); 131 /* To prevent races, we poll the link state in a separate 132 task rather than changing it here */ 133 priv->link_state = event; 134 queue_work(mdev->workqueue, &priv->linkstate_task); 135 break; 136 137 case MLX4_DEV_EVENT_CATASTROPHIC_ERROR: 138 mlx4_err(mdev, "Internal error detected, restarting device\n"); 139 break; 140 141 default: 142 if (port < 1 || port > dev->caps.num_ports || 143 !mdev->pndev[port]) 144 return; 145 mlx4_warn(mdev, "Unhandled event %d for port %d\n", event, 146 (int) port); 147 } 148} 149 150static void mlx4_en_remove(struct mlx4_dev *dev, void *endev_ptr) 151{ 152 struct mlx4_en_dev *mdev = endev_ptr; 153 int i; 154 155 mutex_lock(&mdev->state_lock); 156 mdev->device_up = false; 157 mutex_unlock(&mdev->state_lock); 158 159 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) 160 if (mdev->pndev[i]) 161 mlx4_en_destroy_netdev(mdev->pndev[i]); 162 163 flush_workqueue(mdev->workqueue); 164 destroy_workqueue(mdev->workqueue); 165 mlx4_mr_free(dev, &mdev->mr); 166 mlx4_uar_free(dev, &mdev->priv_uar); 167 mlx4_pd_free(dev, mdev->priv_pdn); 168 sx_destroy(&mdev->state_lock.sx); 169 mtx_destroy(&mdev->uar_lock.m); 170 kfree(mdev); 171} 172 173static void *mlx4_en_add(struct mlx4_dev *dev) 174{ 175 static int mlx4_en_version_printed; 176 struct mlx4_en_dev *mdev; 177 int i; 178 int err; 179 180 if (!mlx4_en_version_printed) { 181 printk(KERN_INFO "%s", mlx4_en_version); 182 mlx4_en_version_printed++; 183 } 184 185 mdev = kzalloc(sizeof *mdev, GFP_KERNEL); 186 if (!mdev) { 187 dev_err(&dev->pdev->dev, "Device struct alloc failed, " 188 "aborting.\n"); 189 err = -ENOMEM; 190 goto err_free_res; 191 } 192 193 if (mlx4_pd_alloc(dev, &mdev->priv_pdn)) 194 goto err_free_dev; 195 196 if (mlx4_uar_alloc(dev, &mdev->priv_uar)) 197 goto err_pd; 198 199 mtx_init(&mdev->uar_lock.m, "mlx4 uar", NULL, MTX_DEF); 200 mdev->uar_map = ioremap(mdev->priv_uar.pfn << PAGE_SHIFT, PAGE_SIZE); 201 if (!mdev->uar_map) 202 goto err_uar; 203 204 mdev->dev = dev; 205 mdev->dma_device = &(dev->pdev->dev); 206 mdev->pdev = dev->pdev; 207 mdev->device_up = false; 208 209 mdev->LSO_support = !!(dev->caps.flags & (1 << 15)); 210 if (!mdev->LSO_support) 211 mlx4_warn(mdev, "LSO not supported, please upgrade to later " 212 "FW version to enable LSO\n"); 213 214 if (mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull, 215 MLX4_PERM_LOCAL_WRITE | MLX4_PERM_LOCAL_READ, 216 0, 0, &mdev->mr)) { 217 mlx4_err(mdev, "Failed allocating memory region\n"); 218 goto err_uar; 219 } 220 if (mlx4_mr_enable(mdev->dev, &mdev->mr)) { 221 mlx4_err(mdev, "Failed enabling memory region\n"); 222 goto err_mr; 223 } 224 225 /* Build device profile according to supplied module parameters */ 226 err = mlx4_en_get_profile(mdev); 227 if (err) { 228 mlx4_err(mdev, "Bad module parameters, aborting.\n"); 229 goto err_mr; 230 } 231 232 /* Configure wich ports to start according to module parameters */ 233 mdev->port_cnt = 0; 234 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) 235 mdev->port_cnt++; 236 237 /* If we did not receive an explicit number of Rx rings, default to 238 * the number of completion vectors populated by the mlx4_core */ 239 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) { 240 mlx4_info(mdev, "Using %d tx rings for port:%d\n", 241 mdev->profile.prof[i].tx_ring_num, i); 242 mdev->profile.prof[i].rx_ring_num = rounddown_pow_of_two( 243 min_t(int, dev->caps.num_comp_vectors, MAX_RX_RINGS)); 244 245 mlx4_info(mdev, "Defaulting to %d rx rings for port:%d\n", 246 mdev->profile.prof[i].rx_ring_num, i); 247 } 248 249 /* Create our own workqueue for reset/multicast tasks 250 * Note: we cannot use the shared workqueue because of deadlocks caused 251 * by the rtnl lock */ 252 mdev->workqueue = create_singlethread_workqueue("mlx4_en"); 253 if (!mdev->workqueue) { 254 err = -ENOMEM; 255 goto err_mr; 256 } 257 258 /* At this stage all non-port specific tasks are complete: 259 * mark the card state as up */ 260 sx_init(&mdev->state_lock.sx, "mlxen state"); 261 mdev->device_up = true; 262 263 /* Setup ports */ 264 265 /* Create a netdev for each port */ 266 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) { 267 mlx4_info(mdev, "Activating port:%d\n", i); 268 if (mlx4_en_init_netdev(mdev, i, &mdev->profile.prof[i])) { 269 mdev->pndev[i] = NULL; 270 goto err_free_netdev; 271 } 272 } 273 return mdev; 274 275 276err_free_netdev: 277 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) { 278 if (mdev->pndev[i]) 279 mlx4_en_destroy_netdev(mdev->pndev[i]); 280 } 281 282 mutex_lock(&mdev->state_lock); 283 mdev->device_up = false; 284 mutex_unlock(&mdev->state_lock); 285 flush_workqueue(mdev->workqueue); 286 287 /* Stop event queue before we drop down to release shared SW state */ 288 destroy_workqueue(mdev->workqueue); 289 290err_mr: 291 mlx4_mr_free(dev, &mdev->mr); 292err_uar: 293 mtx_destroy(&mdev->uar_lock.m); 294 mlx4_uar_free(dev, &mdev->priv_uar); 295err_pd: 296 mlx4_pd_free(dev, mdev->priv_pdn); 297err_free_dev: 298 kfree(mdev); 299err_free_res: 300 return NULL; 301} 302 303enum mlx4_query_reply mlx4_en_query(void *endev_ptr, void *int_dev) 304{ 305 struct mlx4_en_dev *mdev = endev_ptr; 306 struct net_device *netdev = int_dev; 307 int p; 308 309 for (p = 1; p <= MLX4_MAX_PORTS; ++p) 310 if (mdev->pndev[p] == netdev) 311 return p; 312 313 return MLX4_QUERY_NOT_MINE; 314} 315 316#if 0 317static struct pci_device_id mlx4_en_pci_table[] = { 318 { PCI_VDEVICE(MELLANOX, 0x6340) }, /* MT25408 "Hermon" SDR */ 319 { PCI_VDEVICE(MELLANOX, 0x634a) }, /* MT25408 "Hermon" DDR */ 320 { PCI_VDEVICE(MELLANOX, 0x6354) }, /* MT25408 "Hermon" QDR */ 321 { PCI_VDEVICE(MELLANOX, 0x6732) }, /* MT25408 "Hermon" DDR PCIe gen2 */ 322 { PCI_VDEVICE(MELLANOX, 0x673c) }, /* MT25408 "Hermon" QDR PCIe gen2 */ 323 { PCI_VDEVICE(MELLANOX, 0x6368) }, /* MT25408 "Hermon" EN 10GigE */ 324 { PCI_VDEVICE(MELLANOX, 0x6750) }, /* MT25408 "Hermon" EN 10GigE PCIe gen2 */ 325 { PCI_VDEVICE(MELLANOX, 0x6372) }, /* MT25458 ConnectX EN 10GBASE-T 10GigE */ 326 { PCI_VDEVICE(MELLANOX, 0x675a) }, /* MT25458 ConnectX EN 10GBASE-T+Gen2 10GigE */ 327 { PCI_VDEVICE(MELLANOX, 0x6764) }, /* MT26468 ConnectX EN 10GigE PCIe gen2 */ 328 { PCI_VDEVICE(MELLANOX, 0x6746) }, /* MT26438 ConnectX VPI PCIe 2.0 5GT/s - IB QDR / 10GigE Virt+ */ 329 { PCI_VDEVICE(MELLANOX, 0x676e) }, /* MT26478 ConnectX EN 40GigE PCIe 2.0 5GT/s */ 330 { PCI_VDEVICE(MELLANOX, 0x6778) }, /* MT26488 ConnectX VPI PCIe 2.0 5GT/s - IB DDR / 10GigE Virt+ */ 331 { PCI_VDEVICE(MELLANOX, 0x1000) }, 332 { PCI_VDEVICE(MELLANOX, 0x1001) }, 333 { PCI_VDEVICE(MELLANOX, 0x1002) }, 334 { PCI_VDEVICE(MELLANOX, 0x1003) }, 335 { PCI_VDEVICE(MELLANOX, 0x1004) }, 336 { PCI_VDEVICE(MELLANOX, 0x1005) }, 337 { PCI_VDEVICE(MELLANOX, 0x1006) }, 338 { PCI_VDEVICE(MELLANOX, 0x1007) }, 339 { PCI_VDEVICE(MELLANOX, 0x1008) }, 340 { PCI_VDEVICE(MELLANOX, 0x1009) }, 341 { PCI_VDEVICE(MELLANOX, 0x100a) }, 342 { PCI_VDEVICE(MELLANOX, 0x100b) }, 343 { PCI_VDEVICE(MELLANOX, 0x100c) }, 344 { PCI_VDEVICE(MELLANOX, 0x100d) }, 345 { PCI_VDEVICE(MELLANOX, 0x100e) }, 346 { PCI_VDEVICE(MELLANOX, 0x100f) }, 347 { 0, } 348}; 349 350MODULE_DEVICE_TABLE(pci, mlx4_en_pci_table); 351#endif 352 353static struct mlx4_interface mlx4_en_interface = { 354 .add = mlx4_en_add, 355 .remove = mlx4_en_remove, 356 .event = mlx4_en_event, 357 .query = mlx4_en_query, 358 .get_dev = get_netdev, 359 .protocol = MLX4_PROT_ETH, 360}; 361 362static int __init mlx4_en_init(void) 363{ 364 return mlx4_register_interface(&mlx4_en_interface); 365} 366 367static void __exit mlx4_en_cleanup(void) 368{ 369 mlx4_unregister_interface(&mlx4_en_interface); 370} 371 372module_init(mlx4_en_init); 373module_exit(mlx4_en_cleanup); 374 375#undef MODULE_VERSION 376#include <sys/module.h> 377static int 378mlxen_evhand(module_t mod, int event, void *arg) 379{ 380 return (0); 381} 382static moduledata_t mlxen_mod = { 383 .name = "mlxen", 384 .evhand = mlxen_evhand, 385}; 386DECLARE_MODULE(mlxen, mlxen_mod, SI_SUB_SMP, SI_ORDER_ANY); 387MODULE_DEPEND(mlxen, mlx4, 1, 1, 1); 388