[net-next-2.6.git] / drivers / net / mlx4 / port.c

/*
 * Copyright (c) 2007 Mellanox Technologies. All rights reserved.
 *
 * This software is available to you under a choice of one of two
 * licenses.  You may choose to be licensed under the terms of the GNU
 * General Public License (GPL) Version 2, available from the file
 * COPYING in the main directory of this source tree, or the
 * OpenIB.org BSD license below:
 *
 *     Redistribution and use in source and binary forms, with or
 *     without modification, are permitted provided that the following
 *     conditions are met:
 *
 *      - Redistributions of source code must retain the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer.
 *
 *      - Redistributions in binary form must reproduce the above
 *        copyright notice, this list of conditions and the following
 *        disclaimer in the documentation and/or other materials
 *        provided with the distribution.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include <linux/errno.h>
#include <linux/if_ether.h>

#include <linux/mlx4/cmd.h>

#include "mlx4.h"

#define MLX4_MAC_VALID		(1ull << 63)
#define MLX4_MAC_MASK		0xffffffffffffULL

#define MLX4_VLAN_VALID		(1u << 31)
#define MLX4_VLAN_MASK		0xfff

void mlx4_init_mac_table(struct mlx4_dev *dev, struct mlx4_mac_table *table)
{
	int i;

	mutex_init(&table->mutex);
	for (i = 0; i < MLX4_MAX_MAC_NUM; i++) {
		table->entries[i] = 0;
		table->refs[i]	 = 0;
	}
	table->max   = 1 << dev->caps.log_num_macs;
	table->total = 0;
}

void mlx4_init_vlan_table(struct mlx4_dev *dev, struct mlx4_vlan_table *table)
{
	int i;

	mutex_init(&table->mutex);
	for (i = 0; i < MLX4_MAX_VLAN_NUM; i++) {
		table->entries[i] = 0;
		table->refs[i]	 = 0;
	}
	table->max   = 1 << dev->caps.log_num_vlans;
	table->total = 0;
}

static int mlx4_set_port_mac_table(struct mlx4_dev *dev, u8 port,
				   __be64 *entries)
{
	struct mlx4_cmd_mailbox *mailbox;
	u32 in_mod;
	int err;

	mailbox = mlx4_alloc_cmd_mailbox(dev);
	if (IS_ERR(mailbox))
		return PTR_ERR(mailbox);

	memcpy(mailbox->buf, entries, MLX4_MAC_TABLE_SIZE);

	in_mod = MLX4_SET_PORT_MAC_TABLE << 8 | port;
	err = mlx4_cmd(dev, mailbox->dma, in_mod, 1, MLX4_CMD_SET_PORT,
		       MLX4_CMD_TIME_CLASS_B);

	mlx4_free_cmd_mailbox(dev, mailbox);
	return err;
}

int mlx4_register_mac(struct mlx4_dev *dev, u8 port, u64 mac, int *index)
{
	struct mlx4_mac_table *table = &mlx4_priv(dev)->port[port].mac_table;
	int i, err = 0;
	int free = -1;

	mlx4_dbg(dev, "Registering MAC: 0x%llx\n", (unsigned long long) mac);
	mutex_lock(&table->mutex);
	for (i = 0; i < MLX4_MAX_MAC_NUM - 1; i++) {
		if (free < 0 && !table->refs[i]) {
			free = i;
			continue;
		}

		if (mac == (MLX4_MAC_MASK & be64_to_cpu(table->entries[i]))) {
			/* MAC already registered, increase refernce count */
			*index = i;
			++table->refs[i];
			goto out;
		}
	}
	mlx4_dbg(dev, "Free MAC index is %d\n", free);

	if (table->total == table->max) {
		/* No free mac entries */
		err = -ENOSPC;
		goto out;
	}

	/* Register new MAC */
	table->refs[free] = 1;
	table->entries[free] = cpu_to_be64(mac | MLX4_MAC_VALID);

	err = mlx4_set_port_mac_table(dev, port, table->entries);
	if (unlikely(err)) {
		mlx4_err(dev, "Failed adding MAC: 0x%llx\n", (unsigned long long) mac);
		table->refs[free] = 0;
		table->entries[free] = 0;
		goto out;
	}

	*index = free;
	++table->total;
out:
	mutex_unlock(&table->mutex);
	return err;
}
EXPORT_SYMBOL_GPL(mlx4_register_mac);

void mlx4_unregister_mac(struct mlx4_dev *dev, u8 port, int index)
{
	struct mlx4_mac_table *table = &mlx4_priv(dev)->port[port].mac_table;

	mutex_lock(&table->mutex);
	if (!table->refs[index]) {
		mlx4_warn(dev, "No MAC entry for index %d\n", index);
		goto out;
	}
	if (--table->refs[index]) {
		mlx4_warn(dev, "Have more references for index %d,"
			  "no need to modify MAC table\n", index);
		goto out;
	}
	table->entries[index] = 0;
	mlx4_set_port_mac_table(dev, port, table->entries);
	--table->total;
out:
	mutex_unlock(&table->mutex);
}
EXPORT_SYMBOL_GPL(mlx4_unregister_mac);

static int mlx4_set_port_vlan_table(struct mlx4_dev *dev, u8 port,
				    __be32 *entries)
{
	struct mlx4_cmd_mailbox *mailbox;
	u32 in_mod;
	int err;

	mailbox = mlx4_alloc_cmd_mailbox(dev);
	if (IS_ERR(mailbox))
		return PTR_ERR(mailbox);

	memcpy(mailbox->buf, entries, MLX4_VLAN_TABLE_SIZE);
	in_mod = MLX4_SET_PORT_VLAN_TABLE << 8 | port;
	err = mlx4_cmd(dev, mailbox->dma, in_mod, 1, MLX4_CMD_SET_PORT,
		       MLX4_CMD_TIME_CLASS_B);

	mlx4_free_cmd_mailbox(dev, mailbox);

	return err;
}

int mlx4_find_cached_vlan(struct mlx4_dev *dev, u8 port, u16 vid, int *idx)
{
	struct mlx4_vlan_table *table = &mlx4_priv(dev)->port[port].vlan_table;
	int i;

	for (i = 0; i < MLX4_MAX_VLAN_NUM; ++i) {
		if (table->refs[i] &&
		    (vid == (MLX4_VLAN_MASK &
			      be32_to_cpu(table->entries[i])))) {
			/* VLAN already registered, increase reference count */
			*idx = i;
			return 0;
		}
	}

	return -ENOENT;
}
EXPORT_SYMBOL_GPL(mlx4_find_cached_vlan);

int mlx4_register_vlan(struct mlx4_dev *dev, u8 port, u16 vlan, int *index)
{
	struct mlx4_vlan_table *table = &mlx4_priv(dev)->port[port].vlan_table;
	int i, err = 0;
	int free = -1;

	mutex_lock(&table->mutex);
	for (i = MLX4_VLAN_REGULAR; i < MLX4_MAX_VLAN_NUM; i++) {
		if (free < 0 && (table->refs[i] == 0)) {
			free = i;
			continue;
		}

		if (table->refs[i] &&
		    (vlan == (MLX4_VLAN_MASK &
			      be32_to_cpu(table->entries[i])))) {
			/* Vlan already registered, increase refernce count */
			*index = i;
			++table->refs[i];
			goto out;
		}
	}

	if (table->total == table->max) {
		/* No free vlan entries */
		err = -ENOSPC;
		goto out;
	}

	/* Register new MAC */
	table->refs[free] = 1;
	table->entries[free] = cpu_to_be32(vlan | MLX4_VLAN_VALID);

	err = mlx4_set_port_vlan_table(dev, port, table->entries);
	if (unlikely(err)) {
		mlx4_warn(dev, "Failed adding vlan: %u\n", vlan);
		table->refs[free] = 0;
		table->entries[free] = 0;
		goto out;
	}

	*index = free;
	++table->total;
out:
	mutex_unlock(&table->mutex);
	return err;
}
EXPORT_SYMBOL_GPL(mlx4_register_vlan);

void mlx4_unregister_vlan(struct mlx4_dev *dev, u8 port, int index)
{
	struct mlx4_vlan_table *table = &mlx4_priv(dev)->port[port].vlan_table;

	if (index < MLX4_VLAN_REGULAR) {
		mlx4_warn(dev, "Trying to free special vlan index %d\n", index);
		return;
	}

	mutex_lock(&table->mutex);
	if (!table->refs[index]) {
		mlx4_warn(dev, "No vlan entry for index %d\n", index);
		goto out;
	}
	if (--table->refs[index]) {
		mlx4_dbg(dev, "Have more references for index %d,"
			 "no need to modify vlan table\n", index);
		goto out;
	}
	table->entries[index] = 0;
	mlx4_set_port_vlan_table(dev, port, table->entries);
	--table->total;
out:
	mutex_unlock(&table->mutex);
}
EXPORT_SYMBOL_GPL(mlx4_unregister_vlan);

int mlx4_get_port_ib_caps(struct mlx4_dev *dev, u8 port, __be32 *caps)
{
	struct mlx4_cmd_mailbox *inmailbox, *outmailbox;
	u8 *inbuf, *outbuf;
	int err;

	inmailbox = mlx4_alloc_cmd_mailbox(dev);
	if (IS_ERR(inmailbox))
		return PTR_ERR(inmailbox);

	outmailbox = mlx4_alloc_cmd_mailbox(dev);
	if (IS_ERR(outmailbox)) {
		mlx4_free_cmd_mailbox(dev, inmailbox);
		return PTR_ERR(outmailbox);
	}

	inbuf = inmailbox->buf;
	outbuf = outmailbox->buf;
	memset(inbuf, 0, 256);
	memset(outbuf, 0, 256);
	inbuf[0] = 1;
	inbuf[1] = 1;
	inbuf[2] = 1;
	inbuf[3] = 1;
	*(__be16 *) (&inbuf[16]) = cpu_to_be16(0x0015);
	*(__be32 *) (&inbuf[20]) = cpu_to_be32(port);

	err = mlx4_cmd_box(dev, inmailbox->dma, outmailbox->dma, port, 3,
			   MLX4_CMD_MAD_IFC, MLX4_CMD_TIME_CLASS_C);
	if (!err)
		*caps = *(__be32 *) (outbuf + 84);
	mlx4_free_cmd_mailbox(dev, inmailbox);
	mlx4_free_cmd_mailbox(dev, outmailbox);
	return err;
}

int mlx4_SET_PORT(struct mlx4_dev *dev, u8 port)
{
	struct mlx4_cmd_mailbox *mailbox;
	int err;

	if (dev->caps.port_type[port] == MLX4_PORT_TYPE_ETH)
		return 0;

	mailbox = mlx4_alloc_cmd_mailbox(dev);
	if (IS_ERR(mailbox))
		return PTR_ERR(mailbox);

	memset(mailbox->buf, 0, 256);

	((__be32 *) mailbox->buf)[1] = dev->caps.ib_port_def_cap[port];
	err = mlx4_cmd(dev, mailbox->dma, port, 0, MLX4_CMD_SET_PORT,
		       MLX4_CMD_TIME_CLASS_B);

	mlx4_free_cmd_mailbox(dev, mailbox);
	return err;
}
Commit	Line	Data
2a2336f8 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	#include <linux/errno.h>
	34	#include <linux/if_ether.h>
	35
	36	#include <linux/mlx4/cmd.h>
	37
	38	#include "mlx4.h"
	39
	40	#define MLX4_MAC_VALID (1ull << 63)
	41	#define MLX4_MAC_MASK 0xffffffffffffULL
	42
	43	#define MLX4_VLAN_VALID (1u << 31)
	44	#define MLX4_VLAN_MASK 0xfff
	45
	46	void mlx4_init_mac_table(struct mlx4_dev dev, struct mlx4_mac_table table)
	47	{
	48	int i;
	49
	50	mutex_init(&table->mutex);
	51	for (i = 0; i < MLX4_MAX_MAC_NUM; i++) {
	52	table->entries[i] = 0;
	53	table->refs[i] = 0;
	54	}
	55	table->max = 1 << dev->caps.log_num_macs;
	56	table->total = 0;
	57	}
	58
	59	void mlx4_init_vlan_table(struct mlx4_dev dev, struct mlx4_vlan_table table)
	60	{
	61	int i;
	62
	63	mutex_init(&table->mutex);
	64	for (i = 0; i < MLX4_MAX_VLAN_NUM; i++) {
65	table->entries[i] = 0;
66	table->refs[i] = 0;
67	}
68	table->max = 1 << dev->caps.log_num_vlans;
69	table->total = 0;
70	}
71
72	static int mlx4_set_port_mac_table(struct mlx4_dev *dev, u8 port,
73	__be64 *entries)
74	{
75	struct mlx4_cmd_mailbox *mailbox;
76	u32 in_mod;
77	int err;
78
79	mailbox = mlx4_alloc_cmd_mailbox(dev);
80	if (IS_ERR(mailbox))
81	return PTR_ERR(mailbox);
82
83	memcpy(mailbox->buf, entries, MLX4_MAC_TABLE_SIZE);
84
85	in_mod = MLX4_SET_PORT_MAC_TABLE << 8 \| port;
86	err = mlx4_cmd(dev, mailbox->dma, in_mod, 1, MLX4_CMD_SET_PORT,
87	MLX4_CMD_TIME_CLASS_B);
88
89	mlx4_free_cmd_mailbox(dev, mailbox);
90	return err;
91	}
92
93	int mlx4_register_mac(struct mlx4_dev dev, u8 port, u64 mac, int index)
94	{
95	struct mlx4_mac_table *table = &mlx4_priv(dev)->port[port].mac_table;
96	int i, err = 0;
97	int free = -1;
98
99	mlx4_dbg(dev, "Registering MAC: 0x%llx\n", (unsigned long long) mac);
100	mutex_lock(&table->mutex);
101	for (i = 0; i < MLX4_MAX_MAC_NUM - 1; i++) {
102	if (free < 0 && !table->refs[i]) {
103	free = i;
104	continue;
105	}
106
107	if (mac == (MLX4_MAC_MASK & be64_to_cpu(table->entries[i]))) {
108	/* MAC already registered, increase refernce count */
109	*index = i;
110	++table->refs[i];
111	goto out;
112	}
113	}
114	mlx4_dbg(dev, "Free MAC index is %d\n", free);
115
116	if (table->total == table->max) {
117	/* No free mac entries */
118	err = -ENOSPC;
119	goto out;
120	}
121
122	/* Register new MAC */
123	table->refs[free] = 1;
124	table->entries[free] = cpu_to_be64(mac \| MLX4_MAC_VALID);
125
126	err = mlx4_set_port_mac_table(dev, port, table->entries);
127	if (unlikely(err)) {
128	mlx4_err(dev, "Failed adding MAC: 0x%llx\n", (unsigned long long) mac);
129	table->refs[free] = 0;
130	table->entries[free] = 0;
131	goto out;
132	}
133
134	*index = free;
135	++table->total;
136	out:
137	mutex_unlock(&table->mutex);
138	return err;
139	}
140	EXPORT_SYMBOL_GPL(mlx4_register_mac);
141
142	void mlx4_unregister_mac(struct mlx4_dev *dev, u8 port, int index)
143	{
144	struct mlx4_mac_table *table = &mlx4_priv(dev)->port[port].mac_table;
145
146	mutex_lock(&table->mutex);
147	if (!table->refs[index]) {
148	mlx4_warn(dev, "No MAC entry for index %d\n", index);
149	goto out;
150	}
151	if (--table->refs[index]) {
152	mlx4_warn(dev, "Have more references for index %d,"
153	"no need to modify MAC table\n", index);
154	goto out;
155	}
156	table->entries[index] = 0;
157	mlx4_set_port_mac_table(dev, port, table->entries);
158	--table->total;
159	out:
160	mutex_unlock(&table->mutex);
161	}
162	EXPORT_SYMBOL_GPL(mlx4_unregister_mac);
163
164	static int mlx4_set_port_vlan_table(struct mlx4_dev *dev, u8 port,
165	__be32 *entries)
166	{
167	struct mlx4_cmd_mailbox *mailbox;
168	u32 in_mod;
169	int err;
170
171	mailbox = mlx4_alloc_cmd_mailbox(dev);
172	if (IS_ERR(mailbox))
173	return PTR_ERR(mailbox);
174
175	memcpy(mailbox->buf, entries, MLX4_VLAN_TABLE_SIZE);
176	in_mod = MLX4_SET_PORT_VLAN_TABLE << 8 \| port;
177	err = mlx4_cmd(dev, mailbox->dma, in_mod, 1, MLX4_CMD_SET_PORT,
178	MLX4_CMD_TIME_CLASS_B);
179
180	mlx4_free_cmd_mailbox(dev, mailbox);
181
182	return err;
183	}
184
4c3eb3ca EC	185	int mlx4_find_cached_vlan(struct mlx4_dev dev, u8 port, u16 vid, int idx)
	186	{
	187	struct mlx4_vlan_table *table = &mlx4_priv(dev)->port[port].vlan_table;
	188	int i;
	189
	190	for (i = 0; i < MLX4_MAX_VLAN_NUM; ++i) {
	191	if (table->refs[i] &&
	192	(vid == (MLX4_VLAN_MASK &
	193	be32_to_cpu(table->entries[i])))) {
	194	/* VLAN already registered, increase reference count */
	195	*idx = i;
	196	return 0;
	197	}
	198	}
	199
	200	return -ENOENT;
	201	}
	202	EXPORT_SYMBOL_GPL(mlx4_find_cached_vlan);
	203
2a2336f8 YP	204	int mlx4_register_vlan(struct mlx4_dev dev, u8 port, u16 vlan, int index)
	205	{
	206	struct mlx4_vlan_table *table = &mlx4_priv(dev)->port[port].vlan_table;
	207	int i, err = 0;
	208	int free = -1;
	209
	210	mutex_lock(&table->mutex);
	211	for (i = MLX4_VLAN_REGULAR; i < MLX4_MAX_VLAN_NUM; i++) {
	212	if (free < 0 && (table->refs[i] == 0)) {
	213	free = i;
	214	continue;
	215	}
	216
	217	if (table->refs[i] &&
	218	(vlan == (MLX4_VLAN_MASK &
	219	be32_to_cpu(table->entries[i])))) {
	220	/* Vlan already registered, increase refernce count */
	221	*index = i;
	222	++table->refs[i];
	223	goto out;
	224	}
	225	}
	226
	227	if (table->total == table->max) {
	228	/* No free vlan entries */
	229	err = -ENOSPC;
	230	goto out;
	231	}
	232
	233	/* Register new MAC */
	234	table->refs[free] = 1;
	235	table->entries[free] = cpu_to_be32(vlan \| MLX4_VLAN_VALID);
	236
	237	err = mlx4_set_port_vlan_table(dev, port, table->entries);
	238	if (unlikely(err)) {
	239	mlx4_warn(dev, "Failed adding vlan: %u\n", vlan);
	240	table->refs[free] = 0;
	241	table->entries[free] = 0;
	242	goto out;
	243	}
	244
	245	*index = free;
	246	++table->total;
	247	out:
	248	mutex_unlock(&table->mutex);
	249	return err;
	250	}
	251	EXPORT_SYMBOL_GPL(mlx4_register_vlan);
	252
	253	void mlx4_unregister_vlan(struct mlx4_dev *dev, u8 port, int index)
	254	{
	255	struct mlx4_vlan_table *table = &mlx4_priv(dev)->port[port].vlan_table;
	256
	257	if (index < MLX4_VLAN_REGULAR) {
	258	mlx4_warn(dev, "Trying to free special vlan index %d\n", index);
	259	return;
	260	}
	261
	262	mutex_lock(&table->mutex);
	263	if (!table->refs[index]) {
	264	mlx4_warn(dev, "No vlan entry for index %d\n", index);
	265	goto out;
	266	}
	267	if (--table->refs[index]) {
268	mlx4_dbg(dev, "Have more references for index %d,"
269	"no need to modify vlan table\n", index);
270	goto out;
271	}
272	table->entries[index] = 0;
273	mlx4_set_port_vlan_table(dev, port, table->entries);
274	--table->total;
275	out:
276	mutex_unlock(&table->mutex);
277	}
278	EXPORT_SYMBOL_GPL(mlx4_unregister_vlan);
7ff93f8b	279
9a5aa622 JM	280	int mlx4_get_port_ib_caps(struct mlx4_dev dev, u8 port, __be32 caps)
	281	{
	282	struct mlx4_cmd_mailbox inmailbox, outmailbox;
	283	u8 inbuf, outbuf;
	284	int err;
	285
	286	inmailbox = mlx4_alloc_cmd_mailbox(dev);
	287	if (IS_ERR(inmailbox))
	288	return PTR_ERR(inmailbox);
	289
	290	outmailbox = mlx4_alloc_cmd_mailbox(dev);
	291	if (IS_ERR(outmailbox)) {
	292	mlx4_free_cmd_mailbox(dev, inmailbox);
	293	return PTR_ERR(outmailbox);
	294	}
	295
	296	inbuf = inmailbox->buf;
	297	outbuf = outmailbox->buf;
	298	memset(inbuf, 0, 256);
	299	memset(outbuf, 0, 256);
	300	inbuf[0] = 1;
	301	inbuf[1] = 1;
	302	inbuf[2] = 1;
	303	inbuf[3] = 1;
	304	(__be16 ) (&inbuf[16]) = cpu_to_be16(0x0015);
	305	(__be32 ) (&inbuf[20]) = cpu_to_be32(port);
	306
	307	err = mlx4_cmd_box(dev, inmailbox->dma, outmailbox->dma, port, 3,
	308	MLX4_CMD_MAD_IFC, MLX4_CMD_TIME_CLASS_C);
	309	if (!err)
	310	caps = (__be32 *) (outbuf + 84);
	311	mlx4_free_cmd_mailbox(dev, inmailbox);
	312	mlx4_free_cmd_mailbox(dev, outmailbox);
	313	return err;
	314	}
	315
7ff93f8b YP	316	int mlx4_SET_PORT(struct mlx4_dev *dev, u8 port)
	317	{
	318	struct mlx4_cmd_mailbox *mailbox;
	319	int err;
7ff93f8b	320
352b09ed RD	321	if (dev->caps.port_type[port] == MLX4_PORT_TYPE_ETH)
	322	return 0;
	323
7ff93f8b YP	324	mailbox = mlx4_alloc_cmd_mailbox(dev);
	325	if (IS_ERR(mailbox))
	326	return PTR_ERR(mailbox);
	327
	328	memset(mailbox->buf, 0, 256);
793730bf YP	329
	330	((__be32 *) mailbox->buf)[1] = dev->caps.ib_port_def_cap[port];
	331	err = mlx4_cmd(dev, mailbox->dma, port, 0, MLX4_CMD_SET_PORT,
7ff93f8b YP	332	MLX4_CMD_TIME_CLASS_B);
	333
	334	mlx4_free_cmd_mailbox(dev, mailbox);
	335	return err;
	336	}