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/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 " ("DRV_RELDATE")"); 50 51static const char mlx4_en_version[] = 52 DRV_NAME ": Mellanox ConnectX HCA Ethernet driver v" 53 DRV_VERSION " (" DRV_RELDATE ")\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 parameters 63 */ 64 65 66/* Use a XOR rathern than Toeplitz hash function for RSS */ 67MLX4_EN_PARM_INT(rss_xor, 0, "Use XOR hash function for RSS"); 68 69/* RSS hash type mask - default to <saddr, daddr, sport, dport> */ 70MLX4_EN_PARM_INT(rss_mask, 0xf, "RSS hash type bitmask"); 71 72/* Number of LRO sessions per Rx ring (rounded up to a power of two) */ 73MLX4_EN_PARM_INT(num_lro, MLX4_EN_MAX_LRO_DESCRIPTORS, 74 "Number of LRO sessions per ring or disabled (0)"); 75 76/* Priority pausing */ 77MLX4_EN_PARM_INT(pfctx, 0, "Priority based Flow Control policy on TX[7:0]." 78 " Per priority bit mask"); 79MLX4_EN_PARM_INT(pfcrx, 0, "Priority based Flow Control policy on RX[7:0]." 80 " Per priority bit mask"); 81 82int en_print(const char *level, const struct mlx4_en_priv *priv, 83 const char *format, ...) 84{ 85 va_list args; 86 struct va_format vaf; 87 int i; 88 89 va_start(args, format); 90 91 vaf.fmt = format; 92 vaf.va = &args; 93 if (priv->registered) 94 i = printk("%s%s: %s: %pV", 95 level, DRV_NAME, priv->dev->name, &vaf); 96 else 97 i = printk("%s%s: %s: Port %d: %pV", 98 level, DRV_NAME, dev_name(&priv->mdev->pdev->dev), 99 priv->port, &vaf); 100 va_end(args); 101 102 return i; 103} 104 105static int mlx4_en_get_profile(struct mlx4_en_dev *mdev) 106{ 107 struct mlx4_en_profile *params = &mdev->profile; 108 int i; 109 110 params->rss_xor = (rss_xor != 0); 111 params->rss_mask = rss_mask & 0x1f; 112 params->num_lro = min_t(int, num_lro , MLX4_EN_MAX_LRO_DESCRIPTORS); 113 for (i = 1; i <= MLX4_MAX_PORTS; i++) { 114 params->prof[i].rx_pause = 1; 115 params->prof[i].rx_ppp = pfcrx; 116 params->prof[i].tx_pause = 1; 117 params->prof[i].tx_ppp = pfctx; 118 params->prof[i].tx_ring_size = MLX4_EN_DEF_TX_RING_SIZE; 119 params->prof[i].rx_ring_size = MLX4_EN_DEF_RX_RING_SIZE; 120 params->prof[i].tx_ring_num = MLX4_EN_NUM_TX_RINGS + 121 (!!pfcrx) * MLX4_EN_NUM_PPP_RINGS; 122 } 123 124 return 0; 125} 126 127static void mlx4_en_event(struct mlx4_dev *dev, void *endev_ptr, 128 enum mlx4_dev_event event, int port) 129{ 130 struct mlx4_en_dev *mdev = (struct mlx4_en_dev *) endev_ptr; 131 struct mlx4_en_priv *priv; 132 133 if (!mdev->pndev[port]) 134 return; 135 136 priv = netdev_priv(mdev->pndev[port]); 137 switch (event) { 138 case MLX4_DEV_EVENT_PORT_UP: 139 case MLX4_DEV_EVENT_PORT_DOWN: 140 /* To prevent races, we poll the link state in a separate 141 task rather than changing it here */ 142 priv->link_state = event; 143 queue_work(mdev->workqueue, &priv->linkstate_task); 144 break; 145 146 case MLX4_DEV_EVENT_CATASTROPHIC_ERROR: 147 mlx4_err(mdev, "Internal error detected, restarting device\n"); 148 break; 149 150 default: 151 mlx4_warn(mdev, "Unhandled event: %d\n", event); 152 } 153} 154 155static void mlx4_en_remove(struct mlx4_dev *dev, void *endev_ptr) 156{ 157 struct mlx4_en_dev *mdev = endev_ptr; 158 int i; 159 160 mutex_lock(&mdev->state_lock); 161 mdev->device_up = false; 162 mutex_unlock(&mdev->state_lock); 163 164 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) 165 if (mdev->pndev[i]) 166 mlx4_en_destroy_netdev(mdev->pndev[i]); 167 168 flush_workqueue(mdev->workqueue); 169 destroy_workqueue(mdev->workqueue); 170 mlx4_mr_free(dev, &mdev->mr); 171 mlx4_uar_free(dev, &mdev->priv_uar); 172 mlx4_pd_free(dev, mdev->priv_pdn); 173 kfree(mdev); 174} 175 176static void *mlx4_en_add(struct mlx4_dev *dev) 177{ 178 struct mlx4_en_dev *mdev; 179 int i; 180 int err; 181 182 printk_once(KERN_INFO "%s", mlx4_en_version); 183 184 mdev = kzalloc(sizeof *mdev, GFP_KERNEL); 185 if (!mdev) { 186 dev_err(&dev->pdev->dev, "Device struct alloc failed, " 187 "aborting.\n"); 188 err = -ENOMEM; 189 goto err_free_res; 190 } 191 192 if (mlx4_pd_alloc(dev, &mdev->priv_pdn)) 193 goto err_free_dev; 194 195 if (mlx4_uar_alloc(dev, &mdev->priv_uar)) 196 goto err_pd; 197 198 mdev->uar_map = ioremap(mdev->priv_uar.pfn << PAGE_SHIFT, PAGE_SIZE); 199 if (!mdev->uar_map) 200 goto err_uar; 201 spin_lock_init(&mdev->uar_lock); 202 203 mdev->dev = dev; 204 mdev->dma_device = &(dev->pdev->dev); 205 mdev->pdev = dev->pdev; 206 mdev->device_up = false; 207 208 mdev->LSO_support = !!(dev->caps.flags & (1 << 15)); 209 if (!mdev->LSO_support) 210 mlx4_warn(mdev, "LSO not supported, please upgrade to later " 211 "FW version to enable LSO\n"); 212 213 if (mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull, 214 MLX4_PERM_LOCAL_WRITE | MLX4_PERM_LOCAL_READ, 215 0, 0, &mdev->mr)) { 216 mlx4_err(mdev, "Failed allocating memory region\n"); 217 goto err_uar; 218 } 219 if (mlx4_mr_enable(mdev->dev, &mdev->mr)) { 220 mlx4_err(mdev, "Failed enabling memory region\n"); 221 goto err_mr; 222 } 223 224 /* Build device profile according to supplied module parameters */ 225 err = mlx4_en_get_profile(mdev); 226 if (err) { 227 mlx4_err(mdev, "Bad module parameters, aborting.\n"); 228 goto err_mr; 229 } 230 231 /* Configure wich ports to start according to module parameters */ 232 mdev->port_cnt = 0; 233 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) 234 mdev->port_cnt++; 235 236 /* If we did not receive an explicit number of Rx rings, default to 237 * the number of completion vectors populated by the mlx4_core */ 238 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) { 239 mlx4_info(mdev, "Using %d tx rings for port:%d\n", 240 mdev->profile.prof[i].tx_ring_num, i); 241 mdev->profile.prof[i].rx_ring_num = min_t(int, 242 roundup_pow_of_two(dev->caps.num_comp_vectors), 243 MAX_RX_RINGS); 244 mlx4_info(mdev, "Defaulting to %d rx rings for port:%d\n", 245 mdev->profile.prof[i].rx_ring_num, i); 246 } 247 248 /* Create our own workqueue for reset/multicast tasks 249 * Note: we cannot use the shared workqueue because of deadlocks caused 250 * by the rtnl lock */ 251 mdev->workqueue = create_singlethread_workqueue("mlx4_en"); 252 if (!mdev->workqueue) { 253 err = -ENOMEM; 254 goto err_mr; 255 } 256 257 /* At this stage all non-port specific tasks are complete: 258 * mark the card state as up */ 259 mutex_init(&mdev->state_lock); 260 mdev->device_up = true; 261 262 /* Setup ports */ 263 264 /* Create a netdev for each port */ 265 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) { 266 mlx4_info(mdev, "Activating port:%d\n", i); 267 if (mlx4_en_init_netdev(mdev, i, &mdev->profile.prof[i])) 268 mdev->pndev[i] = NULL; 269 } 270 return mdev; 271 272err_mr: 273 mlx4_mr_free(dev, &mdev->mr); 274err_uar: 275 mlx4_uar_free(dev, &mdev->priv_uar); 276err_pd: 277 mlx4_pd_free(dev, mdev->priv_pdn); 278err_free_dev: 279 kfree(mdev); 280err_free_res: 281 return NULL; 282} 283 284static struct mlx4_interface mlx4_en_interface = { 285 .add = mlx4_en_add, 286 .remove = mlx4_en_remove, 287 .event = mlx4_en_event, 288}; 289 290static int __init mlx4_en_init(void) 291{ 292 return mlx4_register_interface(&mlx4_en_interface); 293} 294 295static void __exit mlx4_en_cleanup(void) 296{ 297 mlx4_unregister_interface(&mlx4_en_interface); 298} 299 300module_init(mlx4_en_init); 301module_exit(mlx4_en_cleanup); 302