2 * Copyright (c) 2007 Mellanox Technologies. All rights reserved.
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:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
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.
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
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>
40 #include <linux/mlx4/driver.h>
41 #include <linux/mlx4/device.h>
42 #include <linux/mlx4/cmd.h>
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
")");
51 static const char mlx4_en_version
[] =
52 DRV_NAME
": Mellanox ConnectX HCA Ethernet driver v"
53 DRV_VERSION
" (" DRV_RELDATE
")\n";
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);
62 * Device scope module parameters
65 /* Enable RSS UDP traffic */
66 MLX4_EN_PARM_INT(udp_rss
, 1,
67 "Enable RSS for incoming UDP traffic or disabled (0)");
69 /* Priority pausing */
70 MLX4_EN_PARM_INT(pfctx
, 0, "Priority based Flow Control policy on TX[7:0]."
71 " Per priority bit mask");
72 MLX4_EN_PARM_INT(pfcrx
, 0, "Priority based Flow Control policy on RX[7:0]."
73 " Per priority bit mask");
75 int en_print(const char *level
, const struct mlx4_en_priv
*priv
,
76 const char *format
, ...)
82 va_start(args
, format
);
87 i
= printk("%s%s: %s: %pV",
88 level
, DRV_NAME
, priv
->dev
->name
, &vaf
);
90 i
= printk("%s%s: %s: Port %d: %pV",
91 level
, DRV_NAME
, dev_name(&priv
->mdev
->pdev
->dev
),
98 void mlx4_en_update_loopback_state(struct net_device
*dev
,
99 netdev_features_t features
)
101 struct mlx4_en_priv
*priv
= netdev_priv(dev
);
103 priv
->flags
&= ~(MLX4_EN_FLAG_RX_FILTER_NEEDED
|
104 MLX4_EN_FLAG_ENABLE_HW_LOOPBACK
);
106 /* Drop the packet if SRIOV is not enabled
107 * and not performing the selftest or flb disabled
109 if (mlx4_is_mfunc(priv
->mdev
->dev
) &&
110 !(features
& NETIF_F_LOOPBACK
) && !priv
->validate_loopback
)
111 priv
->flags
|= MLX4_EN_FLAG_RX_FILTER_NEEDED
;
113 /* Set dmac in Tx WQE if we are in SRIOV mode or if loopback selftest
116 if (mlx4_is_mfunc(priv
->mdev
->dev
) || priv
->validate_loopback
)
117 priv
->flags
|= MLX4_EN_FLAG_ENABLE_HW_LOOPBACK
;
120 static int mlx4_en_get_profile(struct mlx4_en_dev
*mdev
)
122 struct mlx4_en_profile
*params
= &mdev
->profile
;
125 params
->udp_rss
= udp_rss
;
126 params
->num_tx_rings_p_up
= min_t(int, num_online_cpus(),
127 MLX4_EN_MAX_TX_RING_P_UP
);
128 if (params
->udp_rss
&& !(mdev
->dev
->caps
.flags
129 & MLX4_DEV_CAP_FLAG_UDP_RSS
)) {
130 mlx4_warn(mdev
, "UDP RSS is not supported on this device.\n");
133 for (i
= 1; i
<= MLX4_MAX_PORTS
; i
++) {
134 params
->prof
[i
].rx_pause
= 1;
135 params
->prof
[i
].rx_ppp
= pfcrx
;
136 params
->prof
[i
].tx_pause
= 1;
137 params
->prof
[i
].tx_ppp
= pfctx
;
138 params
->prof
[i
].tx_ring_size
= MLX4_EN_DEF_TX_RING_SIZE
;
139 params
->prof
[i
].rx_ring_size
= MLX4_EN_DEF_RX_RING_SIZE
;
140 params
->prof
[i
].tx_ring_num
= params
->num_tx_rings_p_up
*
142 params
->prof
[i
].rss_rings
= 0;
148 static void *mlx4_en_get_netdev(struct mlx4_dev
*dev
, void *ctx
, u8 port
)
150 struct mlx4_en_dev
*endev
= ctx
;
152 return endev
->pndev
[port
];
155 static void mlx4_en_event(struct mlx4_dev
*dev
, void *endev_ptr
,
156 enum mlx4_dev_event event
, unsigned long port
)
158 struct mlx4_en_dev
*mdev
= (struct mlx4_en_dev
*) endev_ptr
;
159 struct mlx4_en_priv
*priv
;
162 case MLX4_DEV_EVENT_PORT_UP
:
163 case MLX4_DEV_EVENT_PORT_DOWN
:
164 if (!mdev
->pndev
[port
])
166 priv
= netdev_priv(mdev
->pndev
[port
]);
167 /* To prevent races, we poll the link state in a separate
168 task rather than changing it here */
169 priv
->link_state
= event
;
170 queue_work(mdev
->workqueue
, &priv
->linkstate_task
);
173 case MLX4_DEV_EVENT_CATASTROPHIC_ERROR
:
174 mlx4_err(mdev
, "Internal error detected, restarting device\n");
178 if (port
< 1 || port
> dev
->caps
.num_ports
||
181 mlx4_warn(mdev
, "Unhandled event %d for port %d\n", event
,
186 static void mlx4_en_remove(struct mlx4_dev
*dev
, void *endev_ptr
)
188 struct mlx4_en_dev
*mdev
= endev_ptr
;
191 mutex_lock(&mdev
->state_lock
);
192 mdev
->device_up
= false;
193 mutex_unlock(&mdev
->state_lock
);
195 mlx4_foreach_port(i
, dev
, MLX4_PORT_TYPE_ETH
)
197 mlx4_en_destroy_netdev(mdev
->pndev
[i
]);
199 flush_workqueue(mdev
->workqueue
);
200 destroy_workqueue(mdev
->workqueue
);
201 (void) mlx4_mr_free(dev
, &mdev
->mr
);
202 iounmap(mdev
->uar_map
);
203 mlx4_uar_free(dev
, &mdev
->priv_uar
);
204 mlx4_pd_free(dev
, mdev
->priv_pdn
);
208 static void *mlx4_en_add(struct mlx4_dev
*dev
)
210 struct mlx4_en_dev
*mdev
;
214 printk_once(KERN_INFO
"%s", mlx4_en_version
);
216 mdev
= kzalloc(sizeof(*mdev
), GFP_KERNEL
);
222 if (mlx4_pd_alloc(dev
, &mdev
->priv_pdn
))
225 if (mlx4_uar_alloc(dev
, &mdev
->priv_uar
))
228 mdev
->uar_map
= ioremap((phys_addr_t
) mdev
->priv_uar
.pfn
<< PAGE_SHIFT
,
232 spin_lock_init(&mdev
->uar_lock
);
235 mdev
->dma_device
= &(dev
->pdev
->dev
);
236 mdev
->pdev
= dev
->pdev
;
237 mdev
->device_up
= false;
239 mdev
->LSO_support
= !!(dev
->caps
.flags
& (1 << 15));
240 if (!mdev
->LSO_support
)
241 mlx4_warn(mdev
, "LSO not supported, please upgrade to later "
242 "FW version to enable LSO\n");
244 if (mlx4_mr_alloc(mdev
->dev
, mdev
->priv_pdn
, 0, ~0ull,
245 MLX4_PERM_LOCAL_WRITE
| MLX4_PERM_LOCAL_READ
,
247 mlx4_err(mdev
, "Failed allocating memory region\n");
250 if (mlx4_mr_enable(mdev
->dev
, &mdev
->mr
)) {
251 mlx4_err(mdev
, "Failed enabling memory region\n");
255 /* Build device profile according to supplied module parameters */
256 err
= mlx4_en_get_profile(mdev
);
258 mlx4_err(mdev
, "Bad module parameters, aborting.\n");
262 /* Configure which ports to start according to module parameters */
264 mlx4_foreach_port(i
, dev
, MLX4_PORT_TYPE_ETH
)
267 mlx4_foreach_port(i
, dev
, MLX4_PORT_TYPE_ETH
) {
268 if (!dev
->caps
.comp_pool
) {
269 mdev
->profile
.prof
[i
].rx_ring_num
=
270 rounddown_pow_of_two(max_t(int, MIN_RX_RINGS
,
272 dev
->caps
.num_comp_vectors
,
275 mdev
->profile
.prof
[i
].rx_ring_num
= rounddown_pow_of_two(
276 min_t(int, dev
->caps
.comp_pool
/
277 dev
->caps
.num_ports
- 1 , MAX_MSIX_P_PORT
- 1));
281 /* Create our own workqueue for reset/multicast tasks
282 * Note: we cannot use the shared workqueue because of deadlocks caused
283 * by the rtnl lock */
284 mdev
->workqueue
= create_singlethread_workqueue("mlx4_en");
285 if (!mdev
->workqueue
) {
290 /* At this stage all non-port specific tasks are complete:
291 * mark the card state as up */
292 mutex_init(&mdev
->state_lock
);
293 mdev
->device_up
= true;
297 /* Create a netdev for each port */
298 mlx4_foreach_port(i
, dev
, MLX4_PORT_TYPE_ETH
) {
299 mlx4_info(mdev
, "Activating port:%d\n", i
);
300 if (mlx4_en_init_netdev(mdev
, i
, &mdev
->profile
.prof
[i
]))
301 mdev
->pndev
[i
] = NULL
;
304 /* Initialize time stamp mechanism */
305 if (mdev
->dev
->caps
.flags2
& MLX4_DEV_CAP_FLAG2_TS
)
306 mlx4_en_init_timestamp(mdev
);
311 (void) mlx4_mr_free(dev
, &mdev
->mr
);
314 iounmap(mdev
->uar_map
);
316 mlx4_uar_free(dev
, &mdev
->priv_uar
);
318 mlx4_pd_free(dev
, mdev
->priv_pdn
);
325 static struct mlx4_interface mlx4_en_interface
= {
327 .remove
= mlx4_en_remove
,
328 .event
= mlx4_en_event
,
329 .get_dev
= mlx4_en_get_netdev
,
330 .protocol
= MLX4_PROT_ETH
,
333 static int __init
mlx4_en_init(void)
335 return mlx4_register_interface(&mlx4_en_interface
);
338 static void __exit
mlx4_en_cleanup(void)
340 mlx4_unregister_interface(&mlx4_en_interface
);
343 module_init(mlx4_en_init
);
344 module_exit(mlx4_en_cleanup
);