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c27a02cd YP |
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> | |
5a0e3ad6 | 38 | #include <linux/slab.h> |
c27a02cd YP |
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 | ||
46 | MODULE_AUTHOR("Liran Liss, Yevgeny Petrilin"); | |
47 | MODULE_DESCRIPTION("Mellanox ConnectX HCA Ethernet driver"); | |
48 | MODULE_LICENSE("Dual BSD/GPL"); | |
49 | MODULE_VERSION(DRV_VERSION " ("DRV_RELDATE")"); | |
50 | ||
51 | static const char mlx4_en_version[] = | |
52 | DRV_NAME ": Mellanox ConnectX HCA Ethernet driver v" | |
53 | DRV_VERSION " (" DRV_RELDATE ")\n"; | |
54 | ||
a2b28737 YP |
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 */ | |
67 | MLX4_EN_PARM_INT(rss_xor, 0, "Use XOR hash function for RSS"); | |
68 | ||
69 | /* RSS hash type mask - default to <saddr, daddr, sport, dport> */ | |
70 | MLX4_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) */ | |
73 | MLX4_EN_PARM_INT(num_lro, MLX4_EN_MAX_LRO_DESCRIPTORS, | |
74 | "Number of LRO sessions per ring or disabled (0)"); | |
75 | ||
76 | /* Priority pausing */ | |
77 | MLX4_EN_PARM_INT(pfctx, 0, "Priority based Flow Control policy on TX[7:0]." | |
78 | " Per priority bit mask"); | |
79 | MLX4_EN_PARM_INT(pfcrx, 0, "Priority based Flow Control policy on RX[7:0]." | |
80 | " Per priority bit mask"); | |
81 | ||
82 | static int mlx4_en_get_profile(struct mlx4_en_dev *mdev) | |
83 | { | |
84 | struct mlx4_en_profile *params = &mdev->profile; | |
85 | int i; | |
86 | ||
87 | params->rss_xor = (rss_xor != 0); | |
88 | params->rss_mask = rss_mask & 0x1f; | |
89 | params->num_lro = min_t(int, num_lro , MLX4_EN_MAX_LRO_DESCRIPTORS); | |
90 | for (i = 1; i <= MLX4_MAX_PORTS; i++) { | |
91 | params->prof[i].rx_pause = 1; | |
92 | params->prof[i].rx_ppp = pfcrx; | |
93 | params->prof[i].tx_pause = 1; | |
94 | params->prof[i].tx_ppp = pfctx; | |
95 | params->prof[i].tx_ring_size = MLX4_EN_DEF_TX_RING_SIZE; | |
96 | params->prof[i].rx_ring_size = MLX4_EN_DEF_RX_RING_SIZE; | |
f813cad8 YP |
97 | params->prof[i].tx_ring_num = MLX4_EN_NUM_TX_RINGS + |
98 | (!!pfcrx) * MLX4_EN_NUM_PPP_RINGS; | |
a2b28737 YP |
99 | } |
100 | ||
101 | return 0; | |
102 | } | |
103 | ||
c27a02cd YP |
104 | static void mlx4_en_event(struct mlx4_dev *dev, void *endev_ptr, |
105 | enum mlx4_dev_event event, int port) | |
106 | { | |
107 | struct mlx4_en_dev *mdev = (struct mlx4_en_dev *) endev_ptr; | |
108 | struct mlx4_en_priv *priv; | |
109 | ||
110 | if (!mdev->pndev[port]) | |
111 | return; | |
112 | ||
113 | priv = netdev_priv(mdev->pndev[port]); | |
114 | switch (event) { | |
115 | case MLX4_DEV_EVENT_PORT_UP: | |
116 | case MLX4_DEV_EVENT_PORT_DOWN: | |
117 | /* To prevent races, we poll the link state in a separate | |
118 | task rather than changing it here */ | |
119 | priv->link_state = event; | |
120 | queue_work(mdev->workqueue, &priv->linkstate_task); | |
121 | break; | |
122 | ||
123 | case MLX4_DEV_EVENT_CATASTROPHIC_ERROR: | |
124 | mlx4_err(mdev, "Internal error detected, restarting device\n"); | |
125 | break; | |
126 | ||
127 | default: | |
128 | mlx4_warn(mdev, "Unhandled event: %d\n", event); | |
129 | } | |
130 | } | |
131 | ||
132 | static void mlx4_en_remove(struct mlx4_dev *dev, void *endev_ptr) | |
133 | { | |
134 | struct mlx4_en_dev *mdev = endev_ptr; | |
135 | int i; | |
136 | ||
137 | mutex_lock(&mdev->state_lock); | |
138 | mdev->device_up = false; | |
139 | mutex_unlock(&mdev->state_lock); | |
140 | ||
141 | mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) | |
142 | if (mdev->pndev[i]) | |
143 | mlx4_en_destroy_netdev(mdev->pndev[i]); | |
144 | ||
145 | flush_workqueue(mdev->workqueue); | |
146 | destroy_workqueue(mdev->workqueue); | |
147 | mlx4_mr_free(dev, &mdev->mr); | |
148 | mlx4_uar_free(dev, &mdev->priv_uar); | |
149 | mlx4_pd_free(dev, mdev->priv_pdn); | |
150 | kfree(mdev); | |
151 | } | |
152 | ||
153 | static void *mlx4_en_add(struct mlx4_dev *dev) | |
154 | { | |
155 | static int mlx4_en_version_printed; | |
156 | struct mlx4_en_dev *mdev; | |
157 | int i; | |
158 | int err; | |
159 | ||
160 | if (!mlx4_en_version_printed) { | |
161 | printk(KERN_INFO "%s", mlx4_en_version); | |
162 | mlx4_en_version_printed++; | |
163 | } | |
164 | ||
165 | mdev = kzalloc(sizeof *mdev, GFP_KERNEL); | |
166 | if (!mdev) { | |
167 | dev_err(&dev->pdev->dev, "Device struct alloc failed, " | |
168 | "aborting.\n"); | |
169 | err = -ENOMEM; | |
170 | goto err_free_res; | |
171 | } | |
172 | ||
173 | if (mlx4_pd_alloc(dev, &mdev->priv_pdn)) | |
174 | goto err_free_dev; | |
175 | ||
176 | if (mlx4_uar_alloc(dev, &mdev->priv_uar)) | |
177 | goto err_pd; | |
178 | ||
179 | mdev->uar_map = ioremap(mdev->priv_uar.pfn << PAGE_SHIFT, PAGE_SIZE); | |
180 | if (!mdev->uar_map) | |
181 | goto err_uar; | |
182 | spin_lock_init(&mdev->uar_lock); | |
183 | ||
184 | mdev->dev = dev; | |
185 | mdev->dma_device = &(dev->pdev->dev); | |
186 | mdev->pdev = dev->pdev; | |
187 | mdev->device_up = false; | |
188 | ||
189 | mdev->LSO_support = !!(dev->caps.flags & (1 << 15)); | |
190 | if (!mdev->LSO_support) | |
191 | mlx4_warn(mdev, "LSO not supported, please upgrade to later " | |
192 | "FW version to enable LSO\n"); | |
193 | ||
194 | if (mlx4_mr_alloc(mdev->dev, mdev->priv_pdn, 0, ~0ull, | |
195 | MLX4_PERM_LOCAL_WRITE | MLX4_PERM_LOCAL_READ, | |
196 | 0, 0, &mdev->mr)) { | |
197 | mlx4_err(mdev, "Failed allocating memory region\n"); | |
198 | goto err_uar; | |
199 | } | |
200 | if (mlx4_mr_enable(mdev->dev, &mdev->mr)) { | |
201 | mlx4_err(mdev, "Failed enabling memory region\n"); | |
202 | goto err_mr; | |
203 | } | |
204 | ||
205 | /* Build device profile according to supplied module parameters */ | |
206 | err = mlx4_en_get_profile(mdev); | |
207 | if (err) { | |
208 | mlx4_err(mdev, "Bad module parameters, aborting.\n"); | |
209 | goto err_mr; | |
210 | } | |
211 | ||
212 | /* Configure wich ports to start according to module parameters */ | |
213 | mdev->port_cnt = 0; | |
214 | mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) | |
215 | mdev->port_cnt++; | |
216 | ||
217 | /* If we did not receive an explicit number of Rx rings, default to | |
218 | * the number of completion vectors populated by the mlx4_core */ | |
219 | mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) { | |
220 | mlx4_info(mdev, "Using %d tx rings for port:%d\n", | |
221 | mdev->profile.prof[i].tx_ring_num, i); | |
b6b912e0 YP |
222 | mdev->profile.prof[i].rx_ring_num = min_t(int, |
223 | roundup_pow_of_two(dev->caps.num_comp_vectors), | |
224 | MAX_RX_RINGS); | |
2d6a7b75 YP |
225 | mlx4_info(mdev, "Defaulting to %d rx rings for port:%d\n", |
226 | mdev->profile.prof[i].rx_ring_num, i); | |
c27a02cd YP |
227 | } |
228 | ||
229 | /* Create our own workqueue for reset/multicast tasks | |
230 | * Note: we cannot use the shared workqueue because of deadlocks caused | |
231 | * by the rtnl lock */ | |
232 | mdev->workqueue = create_singlethread_workqueue("mlx4_en"); | |
233 | if (!mdev->workqueue) { | |
234 | err = -ENOMEM; | |
1a44cc37 | 235 | goto err_mr; |
c27a02cd YP |
236 | } |
237 | ||
238 | /* At this stage all non-port specific tasks are complete: | |
239 | * mark the card state as up */ | |
240 | mutex_init(&mdev->state_lock); | |
241 | mdev->device_up = true; | |
242 | ||
243 | /* Setup ports */ | |
244 | ||
245 | /* Create a netdev for each port */ | |
246 | mlx4_foreach_port(i, dev, MLX4_PORT_TYPE_ETH) { | |
247 | mlx4_info(mdev, "Activating port:%d\n", i); | |
3c2fa83f | 248 | if (mlx4_en_init_netdev(mdev, i, &mdev->profile.prof[i])) |
c27a02cd | 249 | mdev->pndev[i] = NULL; |
c27a02cd YP |
250 | } |
251 | return mdev; | |
252 | ||
c27a02cd YP |
253 | err_mr: |
254 | mlx4_mr_free(dev, &mdev->mr); | |
255 | err_uar: | |
256 | mlx4_uar_free(dev, &mdev->priv_uar); | |
257 | err_pd: | |
258 | mlx4_pd_free(dev, mdev->priv_pdn); | |
259 | err_free_dev: | |
260 | kfree(mdev); | |
261 | err_free_res: | |
262 | return NULL; | |
263 | } | |
264 | ||
265 | static struct mlx4_interface mlx4_en_interface = { | |
266 | .add = mlx4_en_add, | |
267 | .remove = mlx4_en_remove, | |
268 | .event = mlx4_en_event, | |
269 | }; | |
270 | ||
271 | static int __init mlx4_en_init(void) | |
272 | { | |
273 | return mlx4_register_interface(&mlx4_en_interface); | |
274 | } | |
275 | ||
276 | static void __exit mlx4_en_cleanup(void) | |
277 | { | |
278 | mlx4_unregister_interface(&mlx4_en_interface); | |
279 | } | |
280 | ||
281 | module_init(mlx4_en_init); | |
282 | module_exit(mlx4_en_cleanup); | |
283 |