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1/*2 * Copyright (c) 2007 Mellanox Technologies. All rights reserved.3 *4 * This software is available to you under a choice of one of two5 * licenses. You may choose to be licensed under the terms of the GNU6 * General Public License (GPL) Version 2, available from the file7 * COPYING in the main directory of this source tree, or the8 * OpenIB.org BSD license below:9 *10 * Redistribution and use in source and binary forms, with or11 * without modification, are permitted provided that the following12 * conditions are met:13 *14 * - Redistributions of source code must retain the above15 * copyright notice, this list of conditions and the following16 * disclaimer.17 *18 * - Redistributions in binary form must reproduce the above19 * copyright notice, this list of conditions and the following20 * disclaimer in the documentation and/or other materials21 * 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 OF25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE30 * 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 46MODULE_AUTHOR("Liran Liss, Yevgeny Petrilin");47MODULE_DESCRIPTION("Mellanox ConnectX HCA Ethernet driver");48MODULE_LICENSE("Dual BSD/GPL");49MODULE_VERSION(DRV_VERSION);50 51static const char mlx4_en_version[] =52 DRV_NAME ": Mellanox ConnectX HCA Ethernet driver v"53 DRV_VERSION "\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 parameters63 */64 65/* Enable RSS UDP traffic */66MLX4_EN_PARM_INT(udp_rss, 1,67 "Enable RSS for incoming UDP traffic or disabled (0)");68 69/* Priority pausing */70MLX4_EN_PARM_INT(pfctx, 0, "Priority based Flow Control policy on TX[7:0]."71 " Per priority bit mask");72MLX4_EN_PARM_INT(pfcrx, 0, "Priority based Flow Control policy on RX[7:0]."73 " Per priority bit mask");74 75MLX4_EN_PARM_INT(inline_thold, MAX_INLINE,76 "Threshold for using inline data (range: 17-104, default: 104)");77 78#define MAX_PFC_TX 0xff79#define MAX_PFC_RX 0xff80 81void en_print(const char *level, const struct mlx4_en_priv *priv,82 const char *format, ...)83{84 va_list args;85 struct va_format vaf;86 87 va_start(args, format);88 89 vaf.fmt = format;90 vaf.va = &args;91 if (priv->registered)92 printk("%s%s: %s: %pV",93 level, DRV_NAME, priv->dev->name, &vaf);94 else95 printk("%s%s: %s: Port %d: %pV",96 level, DRV_NAME, dev_name(&priv->mdev->pdev->dev),97 priv->port, &vaf);98 va_end(args);99}100 101void mlx4_en_update_loopback_state(struct net_device *dev,102 netdev_features_t features)103{104 struct mlx4_en_priv *priv = netdev_priv(dev);105 106 if (features & NETIF_F_LOOPBACK)107 priv->ctrl_flags |= cpu_to_be32(MLX4_WQE_CTRL_FORCE_LOOPBACK);108 else109 priv->ctrl_flags &= cpu_to_be32(~MLX4_WQE_CTRL_FORCE_LOOPBACK);110 111 priv->flags &= ~(MLX4_EN_FLAG_RX_FILTER_NEEDED|112 MLX4_EN_FLAG_ENABLE_HW_LOOPBACK);113 114 /* Drop the packet if SRIOV is not enabled115 * and not performing the selftest or flb disabled116 */117 if (mlx4_is_mfunc(priv->mdev->dev) &&118 !(features & NETIF_F_LOOPBACK) && !priv->validate_loopback)119 priv->flags |= MLX4_EN_FLAG_RX_FILTER_NEEDED;120 121 /* Set dmac in Tx WQE if we are in SRIOV mode or if loopback selftest122 * is requested123 */124 if (mlx4_is_mfunc(priv->mdev->dev) || priv->validate_loopback)125 priv->flags |= MLX4_EN_FLAG_ENABLE_HW_LOOPBACK;126 127 mutex_lock(&priv->mdev->state_lock);128 if ((priv->mdev->dev->caps.flags2 &129 MLX4_DEV_CAP_FLAG2_UPDATE_QP_SRC_CHECK_LB) &&130 priv->rss_map.indir_qp && priv->rss_map.indir_qp->qpn) {131 int i;132 int err = 0;133 int loopback = !!(features & NETIF_F_LOOPBACK);134 135 for (i = 0; i < priv->rx_ring_num; i++) {136 int ret;137 138 ret = mlx4_en_change_mcast_lb(priv,139 &priv->rss_map.qps[i],140 loopback);141 if (!err)142 err = ret;143 }144 if (err)145 mlx4_warn(priv->mdev, "failed to change mcast loopback\n");146 }147 mutex_unlock(&priv->mdev->state_lock);148}149 150static void mlx4_en_get_profile(struct mlx4_en_dev *mdev)151{152 struct mlx4_en_profile *params = &mdev->profile;153 int i;154 155 params->udp_rss = udp_rss;156 params->max_num_tx_rings_p_up = mlx4_low_memory_profile() ?157 MLX4_EN_MIN_TX_RING_P_UP :158 min_t(int, num_online_cpus(), MLX4_EN_MAX_TX_RING_P_UP);159 160 if (params->udp_rss && !(mdev->dev->caps.flags161 & MLX4_DEV_CAP_FLAG_UDP_RSS)) {162 mlx4_warn(mdev, "UDP RSS is not supported on this device\n");163 params->udp_rss = 0;164 }165 for (i = 1; i <= MLX4_MAX_PORTS; i++) {166 params->prof[i].rx_pause = !(pfcrx || pfctx);167 params->prof[i].rx_ppp = pfcrx;168 params->prof[i].tx_pause = !(pfcrx || pfctx);169 params->prof[i].tx_ppp = pfctx;170 if (mlx4_low_memory_profile()) {171 params->prof[i].tx_ring_size = MLX4_EN_MIN_TX_SIZE;172 params->prof[i].rx_ring_size = MLX4_EN_MIN_RX_SIZE;173 } else {174 params->prof[i].tx_ring_size = MLX4_EN_DEF_TX_RING_SIZE;175 params->prof[i].rx_ring_size = MLX4_EN_DEF_RX_RING_SIZE;176 }177 params->prof[i].num_up = MLX4_EN_NUM_UP_LOW;178 params->prof[i].num_tx_rings_p_up = params->max_num_tx_rings_p_up;179 params->prof[i].tx_ring_num[TX] = params->max_num_tx_rings_p_up *180 params->prof[i].num_up;181 params->prof[i].rss_rings = 0;182 params->prof[i].inline_thold = inline_thold;183 }184}185 186static int mlx4_en_event(struct notifier_block *this, unsigned long event,187 void *param)188{189 struct mlx4_en_dev *mdev =190 container_of(this, struct mlx4_en_dev, mlx_nb);191 struct mlx4_dev *dev = mdev->dev;192 struct mlx4_en_priv *priv;193 int port;194 195 switch (event) {196 case MLX4_DEV_EVENT_CATASTROPHIC_ERROR:197 case MLX4_DEV_EVENT_PORT_MGMT_CHANGE:198 case MLX4_DEV_EVENT_SLAVE_INIT:199 case MLX4_DEV_EVENT_SLAVE_SHUTDOWN:200 break;201 default:202 port = *(int *)param;203 break;204 }205 206 switch (event) {207 case MLX4_DEV_EVENT_PORT_UP:208 case MLX4_DEV_EVENT_PORT_DOWN:209 if (!mdev->pndev[port])210 return NOTIFY_DONE;211 priv = netdev_priv(mdev->pndev[port]);212 /* To prevent races, we poll the link state in a separate213 task rather than changing it here */214 priv->link_state = event;215 queue_work(mdev->workqueue, &priv->linkstate_task);216 break;217 218 case MLX4_DEV_EVENT_CATASTROPHIC_ERROR:219 mlx4_err(mdev, "Internal error detected, restarting device\n");220 break;221 222 case MLX4_DEV_EVENT_PORT_MGMT_CHANGE:223 case MLX4_DEV_EVENT_SLAVE_INIT:224 case MLX4_DEV_EVENT_SLAVE_SHUTDOWN:225 break;226 default:227 if (port < 1 || port > dev->caps.num_ports ||228 !mdev->pndev[port])229 return NOTIFY_DONE;230 mlx4_warn(mdev, "Unhandled event %d for port %d\n", (int)event,231 port);232 }233 234 return NOTIFY_DONE;235}236 237static void mlx4_en_remove(struct auxiliary_device *adev)238{239 struct mlx4_adev *madev = container_of(adev, struct mlx4_adev, adev);240 struct mlx4_dev *dev = madev->mdev;241 struct mlx4_en_dev *mdev = auxiliary_get_drvdata(adev);242 int i;243 244 mlx4_unregister_event_notifier(dev, &mdev->mlx_nb);245 246 mutex_lock(&mdev->state_lock);247 mdev->device_up = false;248 mutex_unlock(&mdev->state_lock);249 250 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)251 if (mdev->pndev[i])252 mlx4_en_destroy_netdev(mdev->pndev[i]);253 254 destroy_workqueue(mdev->workqueue);255 (void) mlx4_mr_free(dev, &mdev->mr);256 iounmap(mdev->uar_map);257 mlx4_uar_free(dev, &mdev->priv_uar);258 mlx4_pd_free(dev, mdev->priv_pdn);259 if (mdev->netdev_nb.notifier_call)260 unregister_netdevice_notifier(&mdev->netdev_nb);261 kfree(mdev);262}263 264static int mlx4_en_probe(struct auxiliary_device *adev,265 const struct auxiliary_device_id *id)266{267 struct mlx4_adev *madev = container_of(adev, struct mlx4_adev, adev);268 struct mlx4_dev *dev = madev->mdev;269 struct mlx4_en_dev *mdev;270 int err, i;271 272 printk_once(KERN_INFO "%s", mlx4_en_version);273 274 mdev = kzalloc(sizeof(*mdev), GFP_KERNEL);275 if (!mdev) {276 err = -ENOMEM;277 goto err_free_res;278 }279 280 err = mlx4_pd_alloc(dev, &mdev->priv_pdn);281 if (err)282 goto err_free_dev;283 284 err = mlx4_uar_alloc(dev, &mdev->priv_uar);285 if (err)286 goto err_pd;287 288 mdev->uar_map = ioremap((phys_addr_t) mdev->priv_uar.pfn << PAGE_SHIFT,289 PAGE_SIZE);290 if (!mdev->uar_map) {291 err = -ENOMEM;292 goto err_uar;293 }294 spin_lock_init(&mdev->uar_lock);295 296 mdev->dev = dev;297 mdev->dma_device = &dev->persist->pdev->dev;298 mdev->pdev = dev->persist->pdev;299 mdev->device_up = false;300 301 mdev->LSO_support = !!(dev->caps.flags & (1 << 15));302 if (!mdev->LSO_support)303 mlx4_warn(mdev, "LSO not supported, please upgrade to later FW version to enable LSO\n");304 305 err = mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull,306 MLX4_PERM_LOCAL_WRITE | MLX4_PERM_LOCAL_READ, 0, 0,307 &mdev->mr);308 if (err) {309 mlx4_err(mdev, "Failed allocating memory region\n");310 goto err_map;311 }312 err = mlx4_mr_enable(mdev->dev, &mdev->mr);313 if (err) {314 mlx4_err(mdev, "Failed enabling memory region\n");315 goto err_mr;316 }317 318 /* Build device profile according to supplied module parameters */319 mlx4_en_get_profile(mdev);320 321 /* Configure which ports to start according to module parameters */322 mdev->port_cnt = 0;323 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)324 mdev->port_cnt++;325 326 /* Set default number of RX rings*/327 mlx4_en_set_num_rx_rings(mdev);328 329 /* Create our own workqueue for reset/multicast tasks330 * Note: we cannot use the shared workqueue because of deadlocks caused331 * by the rtnl lock */332 mdev->workqueue = create_singlethread_workqueue("mlx4_en");333 if (!mdev->workqueue) {334 err = -ENOMEM;335 goto err_mr;336 }337 338 /* At this stage all non-port specific tasks are complete:339 * mark the card state as up */340 mutex_init(&mdev->state_lock);341 mdev->device_up = true;342 343 /* register mlx4 core notifier */344 mdev->mlx_nb.notifier_call = mlx4_en_event;345 err = mlx4_register_event_notifier(dev, &mdev->mlx_nb);346 WARN(err, "failed to register mlx4 event notifier (%d)", err);347 348 /* Setup ports */349 350 /* Create a netdev for each port */351 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {352 mlx4_info(mdev, "Activating port:%d\n", i);353 if (mlx4_en_init_netdev(mdev, i, &mdev->profile.prof[i]))354 mdev->pndev[i] = NULL;355 }356 357 /* register netdev notifier */358 mdev->netdev_nb.notifier_call = mlx4_en_netdev_event;359 if (register_netdevice_notifier(&mdev->netdev_nb)) {360 mdev->netdev_nb.notifier_call = NULL;361 mlx4_err(mdev, "Failed to create netdev notifier\n");362 }363 364 auxiliary_set_drvdata(adev, mdev);365 return 0;366 367err_mr:368 (void) mlx4_mr_free(dev, &mdev->mr);369err_map:370 if (mdev->uar_map)371 iounmap(mdev->uar_map);372err_uar:373 mlx4_uar_free(dev, &mdev->priv_uar);374err_pd:375 mlx4_pd_free(dev, mdev->priv_pdn);376err_free_dev:377 kfree(mdev);378err_free_res:379 return err;380}381 382static const struct auxiliary_device_id mlx4_en_id_table[] = {383 { .name = MLX4_ADEV_NAME ".eth" },384 {},385};386 387MODULE_DEVICE_TABLE(auxiliary, mlx4_en_id_table);388 389static struct mlx4_adrv mlx4_en_adrv = {390 .adrv = {391 .name = "eth",392 .probe = mlx4_en_probe,393 .remove = mlx4_en_remove,394 .id_table = mlx4_en_id_table,395 },396 .protocol = MLX4_PROT_ETH,397};398 399static void mlx4_en_verify_params(void)400{401 if (pfctx > MAX_PFC_TX) {402 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",403 pfctx, MAX_PFC_TX);404 pfctx = 0;405 }406 407 if (pfcrx > MAX_PFC_RX) {408 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",409 pfcrx, MAX_PFC_RX);410 pfcrx = 0;411 }412 413 if (inline_thold < MIN_PKT_LEN || inline_thold > MAX_INLINE) {414 pr_warn("mlx4_en: WARNING: illegal module parameter inline_thold %d - should be in range %d-%d, will be changed to default (%d)\n",415 inline_thold, MIN_PKT_LEN, MAX_INLINE, MAX_INLINE);416 inline_thold = MAX_INLINE;417 }418}419 420static int __init mlx4_en_init(void)421{422 mlx4_en_verify_params();423 mlx4_en_init_ptys2ethtool_map();424 425 return mlx4_register_auxiliary_driver(&mlx4_en_adrv);426}427 428static void __exit mlx4_en_cleanup(void)429{430 mlx4_unregister_auxiliary_driver(&mlx4_en_adrv);431}432 433module_init(mlx4_en_init);434module_exit(mlx4_en_cleanup);435 436