2 * Copyright (c) 2007, 2014 Mellanox Technologies. All rights reserved.
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6 * General Public License (GPL) Version 2, available from the file
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11 * without modification, are permitted provided that the following
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15 * copyright notice, this list of conditions and the following
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21 * provided with the distribution.
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
34 #define LINUXKPI_PARAM_PREFIX mlx4_
36 #include <linux/module.h>
37 #include <linux/delay.h>
38 #include <linux/netdevice.h>
39 #include <linux/slab.h>
41 #include <dev/mlx4/driver.h>
42 #include <dev/mlx4/device.h>
43 #include <dev/mlx4/cmd.h>
47 /* Mellanox ConnectX HCA Ethernet driver */
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);
56 * Device scope module parameters
59 /* Enable RSS UDP traffic */
60 MLX4_EN_PARM_INT(udp_rss, 1,
61 "Enable RSS for incoming UDP traffic");
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");
69 #define MAX_PFC_TX 0xff
70 #define MAX_PFC_RX 0xff
73 static int mlx4_en_get_profile(struct mlx4_en_dev *mdev)
75 struct mlx4_en_profile *params = &mdev->profile;
78 params->udp_rss = udp_rss;
79 params->num_tx_rings_p_up = min_t(int, mp_ncpus,
80 MLX4_EN_MAX_TX_RING_P_UP);
81 if (params->udp_rss && !(mdev->dev->caps.flags
82 & MLX4_DEV_CAP_FLAG_UDP_RSS)) {
83 mlx4_warn(mdev, "UDP RSS is not supported on this device.\n");
86 for (i = 1; i <= MLX4_MAX_PORTS; i++) {
87 params->prof[i].rx_pause = 1;
88 params->prof[i].rx_ppp = pfcrx;
89 params->prof[i].tx_pause = 1;
90 params->prof[i].tx_ppp = pfctx;
91 params->prof[i].tx_ring_size = MLX4_EN_DEF_TX_RING_SIZE;
92 params->prof[i].rx_ring_size = MLX4_EN_DEF_RX_RING_SIZE;
93 params->prof[i].tx_ring_num = params->num_tx_rings_p_up *
95 params->prof[i].rss_rings = 0;
101 static void *mlx4_en_get_netdev(struct mlx4_dev *dev, void *ctx, u8 port)
103 struct mlx4_en_dev *endev = ctx;
105 return endev->pndev[port];
108 static void mlx4_en_event(struct mlx4_dev *dev, void *endev_ptr,
109 enum mlx4_dev_event event, unsigned long port)
111 struct mlx4_en_dev *mdev = (struct mlx4_en_dev *) endev_ptr;
112 struct mlx4_en_priv *priv;
115 case MLX4_DEV_EVENT_PORT_UP:
116 case MLX4_DEV_EVENT_PORT_DOWN:
117 if (!mdev->pndev[port])
119 priv = netdev_priv(mdev->pndev[port]);
120 /* To prevent races, we poll the link state in a separate
121 task rather than changing it here */
122 priv->link_state = event;
123 queue_work(mdev->workqueue, &priv->linkstate_task);
126 case MLX4_DEV_EVENT_CATASTROPHIC_ERROR:
127 mlx4_err(mdev, "Internal error detected, restarting device\n");
130 case MLX4_DEV_EVENT_SLAVE_INIT:
131 case MLX4_DEV_EVENT_SLAVE_SHUTDOWN:
134 if (port < 1 || port > dev->caps.num_ports ||
137 mlx4_warn(mdev, "Unhandled event %d for port %d\n", event,
142 static void mlx4_en_remove(struct mlx4_dev *dev, void *endev_ptr)
144 struct mlx4_en_dev *mdev = endev_ptr;
147 mutex_lock(&mdev->state_lock);
148 mdev->device_up = false;
149 mutex_unlock(&mdev->state_lock);
151 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
153 mlx4_en_destroy_netdev(mdev->pndev[i]);
155 flush_workqueue(mdev->workqueue);
156 destroy_workqueue(mdev->workqueue);
157 ret = mlx4_mr_free(dev, &mdev->mr);
159 mlx4_err(mdev, "Error deregistering MR. The system may have become unstable.");
160 iounmap(mdev->uar_map);
161 mlx4_uar_free(dev, &mdev->priv_uar);
162 mlx4_pd_free(dev, mdev->priv_pdn);
166 static void *mlx4_en_add(struct mlx4_dev *dev)
168 struct mlx4_en_dev *mdev;
172 mdev = kzalloc(sizeof *mdev, GFP_KERNEL);
174 dev_err(&dev->pdev->dev, "Device struct alloc failed, "
180 if (mlx4_pd_alloc(dev, &mdev->priv_pdn))
183 if (mlx4_uar_alloc(dev, &mdev->priv_uar))
186 mdev->uar_map = ioremap((phys_addr_t) mdev->priv_uar.pfn << PAGE_SHIFT,
190 spin_lock_init(&mdev->uar_lock);
193 mdev->dma_device = &(dev->pdev->dev);
194 mdev->pdev = dev->pdev;
195 mdev->device_up = false;
197 mdev->LSO_support = !!(dev->caps.flags & (1 << 15));
198 if (!mdev->LSO_support)
199 mlx4_warn(mdev, "LSO not supported, please upgrade to later "
200 "FW version to enable LSO\n");
202 if (mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull,
203 MLX4_PERM_LOCAL_WRITE | MLX4_PERM_LOCAL_READ,
205 mlx4_err(mdev, "Failed allocating memory region\n");
208 if (mlx4_mr_enable(mdev->dev, &mdev->mr)) {
209 mlx4_err(mdev, "Failed enabling memory region\n");
213 /* Build device profile according to supplied module parameters */
214 err = mlx4_en_get_profile(mdev);
216 mlx4_err(mdev, "Bad module parameters, aborting.\n");
220 /* Configure which ports to start according to module parameters */
222 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH)
226 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
227 if (!dev->caps.comp_pool) {
228 mdev->profile.prof[i].rx_ring_num =
229 rounddown_pow_of_two(max_t(int, MIN_RX_RINGS,
231 dev->caps.num_comp_vectors,
234 mdev->profile.prof[i].rx_ring_num = rounddown_pow_of_two(
235 min_t(int, dev->caps.comp_pool /
236 dev->caps.num_ports, MAX_MSIX_P_PORT));
240 /* Create our own workqueue for reset/multicast tasks
241 * Note: we cannot use the shared workqueue because of deadlocks caused
242 * by the rtnl lock */
243 mdev->workqueue = create_singlethread_workqueue("mlx4_en");
244 if (!mdev->workqueue) {
249 /* At this stage all non-port specific tasks are complete:
250 * mark the card state as up */
251 mutex_init(&mdev->state_lock);
252 mdev->device_up = true;
256 /* Create a netdev for each port */
257 mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) {
258 mlx4_info(mdev, "Activating port:%d\n", i);
259 if (mlx4_en_init_netdev(mdev, i, &mdev->profile.prof[i]))
260 mdev->pndev[i] = NULL;
266 err = mlx4_mr_free(dev, &mdev->mr);
268 mlx4_err(mdev, "Error deregistering MR. The system may have become unstable.");
271 iounmap(mdev->uar_map);
273 mlx4_uar_free(dev, &mdev->priv_uar);
275 mlx4_pd_free(dev, mdev->priv_pdn);
282 static struct mlx4_interface mlx4_en_interface = {
284 .remove = mlx4_en_remove,
285 .event = mlx4_en_event,
286 .get_dev = mlx4_en_get_netdev,
287 .protocol = MLX4_PROT_ETH,
290 static void mlx4_en_verify_params(void)
292 if (pfctx > MAX_PFC_TX) {
293 pr_warn("mlx4_en: WARNING: illegal module parameter pfctx 0x%x - "
294 "should be in range 0-0x%x, will be changed to default (0)\n",
299 if (pfcrx > MAX_PFC_RX) {
300 pr_warn("mlx4_en: WARNING: illegal module parameter pfcrx 0x%x - "
301 "should be in range 0-0x%x, will be changed to default (0)\n",
308 static int __init mlx4_en_init(void)
310 mlx4_en_verify_params();
312 #ifdef CONFIG_DEBUG_FS
314 err = mlx4_en_register_debugfs();
316 pr_err(KERN_ERR "Failed to register debugfs\n");
318 return mlx4_register_interface(&mlx4_en_interface);
321 static void __exit mlx4_en_cleanup(void)
323 mlx4_unregister_interface(&mlx4_en_interface);
324 #ifdef CONFIG_DEBUG_FS
325 mlx4_en_unregister_debugfs();
329 module_init(mlx4_en_init);
330 module_exit(mlx4_en_cleanup);
333 mlx4en_evhand(module_t mod, int event, void *arg)
337 static moduledata_t mlx4en_mod = {
339 .evhand = mlx4en_evhand,
341 DECLARE_MODULE(mlx4en, mlx4en_mod, SI_SUB_OFED_PREINIT, SI_ORDER_ANY);
342 MODULE_DEPEND(mlx4en, mlx4, 1, 1, 1);
343 MODULE_DEPEND(mlx4en, linuxkpi, 1, 1, 1);