1219820Sjeff/* 2272407Shselasky * Copyright (c) 2007, 2014 Mellanox Technologies. All rights reserved. 3219820Sjeff * 4219820Sjeff * This software is available to you under a choice of one of two 5219820Sjeff * licenses. You may choose to be licensed under the terms of the GNU 6219820Sjeff * General Public License (GPL) Version 2, available from the file 7219820Sjeff * COPYING in the main directory of this source tree, or the 8219820Sjeff * OpenIB.org BSD license below: 9219820Sjeff * 10219820Sjeff * Redistribution and use in source and binary forms, with or 11219820Sjeff * without modification, are permitted provided that the following 12219820Sjeff * conditions are met: 13219820Sjeff * 14219820Sjeff * - Redistributions of source code must retain the above 15219820Sjeff * copyright notice, this list of conditions and the following 16219820Sjeff * disclaimer. 17219820Sjeff * 18219820Sjeff * - Redistributions in binary form must reproduce the above 19219820Sjeff * copyright notice, this list of conditions and the following 20219820Sjeff * disclaimer in the documentation and/or other materials 21219820Sjeff * provided with the distribution. 22219820Sjeff * 23219820Sjeff * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 24219820Sjeff * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 25219820Sjeff * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 26219820Sjeff * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 27219820Sjeff * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 28219820Sjeff * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 29219820Sjeff * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 30219820Sjeff * SOFTWARE. 31219820Sjeff * 32219820Sjeff */ 33219820Sjeff 34219820Sjeff#include <linux/module.h> 35219820Sjeff#include <linux/delay.h> 36219820Sjeff#include <linux/netdevice.h> 37272407Shselasky#include <linux/slab.h> 38219820Sjeff 39219820Sjeff#include <linux/mlx4/driver.h> 40219820Sjeff#include <linux/mlx4/device.h> 41219820Sjeff#include <linux/mlx4/cmd.h> 42219820Sjeff 43219820Sjeff#include "mlx4_en.h" 44219820Sjeff 45292107Shselasky/* Mellanox ConnectX HCA Ethernet driver */ 46219820Sjeff 47219820Sjeff#define MLX4_EN_PARM_INT(X, def_val, desc) \ 48219820Sjeff static unsigned int X = def_val;\ 49219820Sjeff module_param(X , uint, 0444); \ 50219820Sjeff MODULE_PARM_DESC(X, desc); 51219820Sjeff 52219820Sjeff 53219820Sjeff/* 54219820Sjeff * Device scope module parameters 55219820Sjeff */ 56219820Sjeff 57219820Sjeff/* Enable RSS UDP traffic */ 58219820SjeffMLX4_EN_PARM_INT(udp_rss, 1, 59272407Shselasky "Enable RSS for incoming UDP traffic"); 60219820Sjeff 61219820Sjeff/* Priority pausing */ 62219820SjeffMLX4_EN_PARM_INT(pfctx, 0, "Priority based Flow Control policy on TX[7:0]." 63219820Sjeff " Per priority bit mask"); 64219820SjeffMLX4_EN_PARM_INT(pfcrx, 0, "Priority based Flow Control policy on RX[7:0]." 65219820Sjeff " Per priority bit mask"); 66219820Sjeff 67272407Shselasky#define MAX_PFC_TX 0xff 68272407Shselasky#define MAX_PFC_RX 0xff 69272407Shselasky 70272407Shselasky 71219820Sjeffstatic int mlx4_en_get_profile(struct mlx4_en_dev *mdev) 72219820Sjeff{ 73219820Sjeff struct mlx4_en_profile *params = &mdev->profile; 74219820Sjeff int i; 75219820Sjeff 76219820Sjeff params->udp_rss = udp_rss; 77272407Shselasky params->num_tx_rings_p_up = min_t(int, mp_ncpus, 78272407Shselasky MLX4_EN_MAX_TX_RING_P_UP); 79272407Shselasky if (params->udp_rss && !(mdev->dev->caps.flags 80272407Shselasky & MLX4_DEV_CAP_FLAG_UDP_RSS)) { 81219820Sjeff mlx4_warn(mdev, "UDP RSS is not supported on this device.\n"); 82219820Sjeff params->udp_rss = 0; 83219820Sjeff } 84219820Sjeff for (i = 1; i <= MLX4_MAX_PORTS; i++) { 85219820Sjeff params->prof[i].rx_pause = 1; 86219820Sjeff params->prof[i].rx_ppp = pfcrx; 87219820Sjeff params->prof[i].tx_pause = 1; 88219820Sjeff params->prof[i].tx_ppp = pfctx; 89219820Sjeff params->prof[i].tx_ring_size = MLX4_EN_DEF_TX_RING_SIZE; 90219820Sjeff params->prof[i].rx_ring_size = MLX4_EN_DEF_RX_RING_SIZE; 91272407Shselasky params->prof[i].tx_ring_num = params->num_tx_rings_p_up * 92272407Shselasky MLX4_EN_NUM_UP; 93272407Shselasky params->prof[i].rss_rings = 0; 94219820Sjeff } 95219820Sjeff 96219820Sjeff return 0; 97219820Sjeff} 98219820Sjeff 99272407Shselaskystatic void *mlx4_en_get_netdev(struct mlx4_dev *dev, void *ctx, u8 port) 100219820Sjeff{ 101219820Sjeff struct mlx4_en_dev *endev = ctx; 102219820Sjeff 103219820Sjeff return endev->pndev[port]; 104219820Sjeff} 105219820Sjeff 106219820Sjeffstatic void mlx4_en_event(struct mlx4_dev *dev, void *endev_ptr, 107255932Salfred enum mlx4_dev_event event, unsigned long port) 108219820Sjeff{ 109219820Sjeff struct mlx4_en_dev *mdev = (struct mlx4_en_dev *) endev_ptr; 110219820Sjeff struct mlx4_en_priv *priv; 111219820Sjeff 112219820Sjeff switch (event) { 113219820Sjeff case MLX4_DEV_EVENT_PORT_UP: 114219820Sjeff case MLX4_DEV_EVENT_PORT_DOWN: 115255932Salfred if (!mdev->pndev[port]) 116255932Salfred return; 117255932Salfred priv = netdev_priv(mdev->pndev[port]); 118219820Sjeff /* To prevent races, we poll the link state in a separate 119219820Sjeff task rather than changing it here */ 120219820Sjeff priv->link_state = event; 121219820Sjeff queue_work(mdev->workqueue, &priv->linkstate_task); 122219820Sjeff break; 123219820Sjeff 124219820Sjeff case MLX4_DEV_EVENT_CATASTROPHIC_ERROR: 125219820Sjeff mlx4_err(mdev, "Internal error detected, restarting device\n"); 126219820Sjeff break; 127219820Sjeff 128272407Shselasky case MLX4_DEV_EVENT_SLAVE_INIT: 129272407Shselasky case MLX4_DEV_EVENT_SLAVE_SHUTDOWN: 130272407Shselasky break; 131219820Sjeff default: 132255932Salfred if (port < 1 || port > dev->caps.num_ports || 133255932Salfred !mdev->pndev[port]) 134255932Salfred return; 135255932Salfred mlx4_warn(mdev, "Unhandled event %d for port %d\n", event, 136255932Salfred (int) port); 137219820Sjeff } 138219820Sjeff} 139219820Sjeff 140219820Sjeffstatic void mlx4_en_remove(struct mlx4_dev *dev, void *endev_ptr) 141219820Sjeff{ 142219820Sjeff struct mlx4_en_dev *mdev = endev_ptr; 143272407Shselasky int i, ret; 144219820Sjeff 145219820Sjeff mutex_lock(&mdev->state_lock); 146219820Sjeff mdev->device_up = false; 147219820Sjeff mutex_unlock(&mdev->state_lock); 148219820Sjeff 149219820Sjeff mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) 150219820Sjeff if (mdev->pndev[i]) 151219820Sjeff mlx4_en_destroy_netdev(mdev->pndev[i]); 152219820Sjeff 153219820Sjeff flush_workqueue(mdev->workqueue); 154219820Sjeff destroy_workqueue(mdev->workqueue); 155272407Shselasky ret = mlx4_mr_free(dev, &mdev->mr); 156272407Shselasky if (ret) 157272407Shselasky mlx4_err(mdev, "Error deregistering MR. The system may have become unstable."); 158272407Shselasky iounmap(mdev->uar_map); 159219820Sjeff mlx4_uar_free(dev, &mdev->priv_uar); 160219820Sjeff mlx4_pd_free(dev, mdev->priv_pdn); 161219820Sjeff kfree(mdev); 162219820Sjeff} 163219820Sjeff 164219820Sjeffstatic void *mlx4_en_add(struct mlx4_dev *dev) 165219820Sjeff{ 166219820Sjeff struct mlx4_en_dev *mdev; 167219820Sjeff int i; 168219820Sjeff int err; 169219820Sjeff 170219820Sjeff mdev = kzalloc(sizeof *mdev, GFP_KERNEL); 171219820Sjeff if (!mdev) { 172219820Sjeff dev_err(&dev->pdev->dev, "Device struct alloc failed, " 173219820Sjeff "aborting.\n"); 174219820Sjeff err = -ENOMEM; 175219820Sjeff goto err_free_res; 176219820Sjeff } 177219820Sjeff 178219820Sjeff if (mlx4_pd_alloc(dev, &mdev->priv_pdn)) 179219820Sjeff goto err_free_dev; 180219820Sjeff 181219820Sjeff if (mlx4_uar_alloc(dev, &mdev->priv_uar)) 182219820Sjeff goto err_pd; 183219820Sjeff 184272407Shselasky mdev->uar_map = ioremap((phys_addr_t) mdev->priv_uar.pfn << PAGE_SHIFT, 185272407Shselasky PAGE_SIZE); 186219820Sjeff if (!mdev->uar_map) 187219820Sjeff goto err_uar; 188272407Shselasky spin_lock_init(&mdev->uar_lock); 189219820Sjeff 190219820Sjeff mdev->dev = dev; 191219820Sjeff mdev->dma_device = &(dev->pdev->dev); 192219820Sjeff mdev->pdev = dev->pdev; 193219820Sjeff mdev->device_up = false; 194219820Sjeff 195219820Sjeff mdev->LSO_support = !!(dev->caps.flags & (1 << 15)); 196219820Sjeff if (!mdev->LSO_support) 197219820Sjeff mlx4_warn(mdev, "LSO not supported, please upgrade to later " 198219820Sjeff "FW version to enable LSO\n"); 199219820Sjeff 200219820Sjeff if (mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull, 201219820Sjeff MLX4_PERM_LOCAL_WRITE | MLX4_PERM_LOCAL_READ, 202219820Sjeff 0, 0, &mdev->mr)) { 203219820Sjeff mlx4_err(mdev, "Failed allocating memory region\n"); 204272407Shselasky goto err_map; 205219820Sjeff } 206219820Sjeff if (mlx4_mr_enable(mdev->dev, &mdev->mr)) { 207219820Sjeff mlx4_err(mdev, "Failed enabling memory region\n"); 208219820Sjeff goto err_mr; 209219820Sjeff } 210219820Sjeff 211219820Sjeff /* Build device profile according to supplied module parameters */ 212219820Sjeff err = mlx4_en_get_profile(mdev); 213219820Sjeff if (err) { 214219820Sjeff mlx4_err(mdev, "Bad module parameters, aborting.\n"); 215219820Sjeff goto err_mr; 216219820Sjeff } 217219820Sjeff 218272407Shselasky /* Configure which ports to start according to module parameters */ 219219820Sjeff mdev->port_cnt = 0; 220219820Sjeff mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) 221219820Sjeff mdev->port_cnt++; 222219820Sjeff 223272407Shselasky 224219820Sjeff mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) { 225272407Shselasky if (!dev->caps.comp_pool) { 226272407Shselasky mdev->profile.prof[i].rx_ring_num = 227272407Shselasky rounddown_pow_of_two(max_t(int, MIN_RX_RINGS, 228272407Shselasky min_t(int, 229272407Shselasky dev->caps.num_comp_vectors, 230272407Shselasky DEF_RX_RINGS))); 231272407Shselasky } else { 232272407Shselasky mdev->profile.prof[i].rx_ring_num = rounddown_pow_of_two( 233279731Shselasky min_t(int, dev->caps.comp_pool / 234279731Shselasky dev->caps.num_ports, MAX_MSIX_P_PORT)); 235272407Shselasky } 236219820Sjeff } 237219820Sjeff 238219820Sjeff /* Create our own workqueue for reset/multicast tasks 239219820Sjeff * Note: we cannot use the shared workqueue because of deadlocks caused 240219820Sjeff * by the rtnl lock */ 241219820Sjeff mdev->workqueue = create_singlethread_workqueue("mlx4_en"); 242219820Sjeff if (!mdev->workqueue) { 243219820Sjeff err = -ENOMEM; 244219820Sjeff goto err_mr; 245219820Sjeff } 246219820Sjeff 247219820Sjeff /* At this stage all non-port specific tasks are complete: 248219820Sjeff * mark the card state as up */ 249272407Shselasky mutex_init(&mdev->state_lock); 250219820Sjeff mdev->device_up = true; 251219820Sjeff 252219820Sjeff /* Setup ports */ 253219820Sjeff 254219820Sjeff /* Create a netdev for each port */ 255219820Sjeff mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) { 256219820Sjeff mlx4_info(mdev, "Activating port:%d\n", i); 257272407Shselasky if (mlx4_en_init_netdev(mdev, i, &mdev->profile.prof[i])) 258219820Sjeff mdev->pndev[i] = NULL; 259219820Sjeff } 260272407Shselasky 261219820Sjeff return mdev; 262219820Sjeff 263219820Sjefferr_mr: 264272407Shselasky err = mlx4_mr_free(dev, &mdev->mr); 265272407Shselasky if (err) 266272407Shselasky mlx4_err(mdev, "Error deregistering MR. The system may have become unstable."); 267272407Shselaskyerr_map: 268272407Shselasky if (mdev->uar_map) 269272407Shselasky iounmap(mdev->uar_map); 270219820Sjefferr_uar: 271219820Sjeff mlx4_uar_free(dev, &mdev->priv_uar); 272219820Sjefferr_pd: 273219820Sjeff mlx4_pd_free(dev, mdev->priv_pdn); 274219820Sjefferr_free_dev: 275219820Sjeff kfree(mdev); 276219820Sjefferr_free_res: 277219820Sjeff return NULL; 278219820Sjeff} 279219820Sjeff 280272407Shselaskystatic struct mlx4_interface mlx4_en_interface = { 281272407Shselasky .add = mlx4_en_add, 282272407Shselasky .remove = mlx4_en_remove, 283272407Shselasky .event = mlx4_en_event, 284272407Shselasky .get_dev = mlx4_en_get_netdev, 285272407Shselasky .protocol = MLX4_PROT_ETH, 286272407Shselasky}; 287272407Shselasky 288272407Shselaskystatic void mlx4_en_verify_params(void) 289219820Sjeff{ 290272407Shselasky if (pfctx > MAX_PFC_TX) { 291272407Shselasky pr_warn("mlx4_en: WARNING: illegal module parameter pfctx 0x%x - " 292272407Shselasky "should be in range 0-0x%x, will be changed to default (0)\n", 293272407Shselasky pfctx, MAX_PFC_TX); 294272407Shselasky pfctx = 0; 295272407Shselasky } 296219820Sjeff 297272407Shselasky if (pfcrx > MAX_PFC_RX) { 298272407Shselasky pr_warn("mlx4_en: WARNING: illegal module parameter pfcrx 0x%x - " 299272407Shselasky "should be in range 0-0x%x, will be changed to default (0)\n", 300272407Shselasky pfcrx, MAX_PFC_RX); 301272407Shselasky pfcrx = 0; 302272407Shselasky } 303219820Sjeff} 304219820Sjeff 305219820Sjeff 306219820Sjeffstatic int __init mlx4_en_init(void) 307219820Sjeff{ 308272407Shselasky mlx4_en_verify_params(); 309272407Shselasky 310272407Shselasky#ifdef CONFIG_DEBUG_FS 311272407Shselasky int err = 0; 312272407Shselasky err = mlx4_en_register_debugfs(); 313272407Shselasky if (err) 314272407Shselasky pr_err(KERN_ERR "Failed to register debugfs\n"); 315272407Shselasky#endif 316219820Sjeff return mlx4_register_interface(&mlx4_en_interface); 317219820Sjeff} 318219820Sjeff 319219820Sjeffstatic void __exit mlx4_en_cleanup(void) 320219820Sjeff{ 321219820Sjeff mlx4_unregister_interface(&mlx4_en_interface); 322272407Shselasky#ifdef CONFIG_DEBUG_FS 323272407Shselasky mlx4_en_unregister_debugfs(); 324272407Shselasky#endif 325219820Sjeff} 326219820Sjeff 327219820Sjeffmodule_init(mlx4_en_init); 328219820Sjeffmodule_exit(mlx4_en_cleanup); 329219820Sjeff 330219820Sjeff#undef MODULE_VERSION 331219820Sjeff#include <sys/module.h> 332219820Sjeffstatic int 333219820Sjeffmlxen_evhand(module_t mod, int event, void *arg) 334219820Sjeff{ 335219820Sjeff return (0); 336219820Sjeff} 337219820Sjeffstatic moduledata_t mlxen_mod = { 338219820Sjeff .name = "mlxen", 339219820Sjeff .evhand = mlxen_evhand, 340219820Sjeff}; 341269862ShselaskyDECLARE_MODULE(mlxen, mlxen_mod, SI_SUB_OFED_PREINIT, SI_ORDER_ANY); 342219820SjeffMODULE_DEPEND(mlxen, mlx4, 1, 1, 1); 343