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
40int mlx4_ib_set_4k_mtu = 0;
41module_param_named(set_4k_mtu, mlx4_ib_set_4k_mtu, int, 0444);
42MODULE_PARM_DESC(set_4k_mtu, "attempt to set 4K MTU to all ConnectX ports");
43
44#define MLX4_MAC_VALID		(1ull << 63)
45#define MLX4_MAC_MASK		0xffffffffffffULL
46
47#define MLX4_VLAN_VALID		(1u << 31)
48#define MLX4_VLAN_MASK		0xfff
49
50void mlx4_init_mac_table(struct mlx4_dev *dev, struct mlx4_mac_table *table)
51{
52	int i;
53
54	mutex_init(&table->mutex);
55	for (i = 0; i < MLX4_MAX_MAC_NUM; i++) {
56		table->entries[i] = 0;
57		table->refs[i]	 = 0;
58	}
59	table->max   = 1 << dev->caps.log_num_macs;
60	table->total = 0;
61}
62
63void mlx4_init_vlan_table(struct mlx4_dev *dev, struct mlx4_vlan_table *table)
64{
65	int i;
66
67	mutex_init(&table->mutex);
68	for (i = 0; i < MLX4_MAX_VLAN_NUM; i++) {
69		table->entries[i] = 0;
70		table->refs[i]	 = 0;
71	}
72	table->max   = 1 << dev->caps.log_num_vlans;
73	table->total = 0;
74}
75
76static int mlx4_set_port_mac_table(struct mlx4_dev *dev, u8 port,
77				   __be64 *entries)
78{
79	struct mlx4_cmd_mailbox *mailbox;
80	u32 in_mod;
81	int err;
82
83	mailbox = mlx4_alloc_cmd_mailbox(dev);
84	if (IS_ERR(mailbox))
85		return PTR_ERR(mailbox);
86
87	memcpy(mailbox->buf, entries, MLX4_MAC_TABLE_SIZE);
88
89	in_mod = MLX4_SET_PORT_MAC_TABLE << 8 | port;
90	err = mlx4_cmd(dev, mailbox->dma, in_mod, 1, MLX4_CMD_SET_PORT,
91		       MLX4_CMD_TIME_CLASS_B);
92
93	mlx4_free_cmd_mailbox(dev, mailbox);
94	return err;
95}
96
97int mlx4_register_mac(struct mlx4_dev *dev, u8 port, u64 mac, int *index)
98{
99	struct mlx4_mac_table *table = &mlx4_priv(dev)->port[port].mac_table;
100	int i, err = 0;
101	int free = -1;
102
103	mlx4_dbg(dev, "Registering MAC: 0x%llx\n", (unsigned long long) mac);
104	mutex_lock(&table->mutex);
105	for (i = 0; i < MLX4_MAX_MAC_NUM - 1; i++) {
106		if (free < 0 && !table->refs[i]) {
107			free = i;
108			continue;
109		}
110
111		if (mac == (MLX4_MAC_MASK & be64_to_cpu(table->entries[i]))) {
112			/* MAC already registered, increase refernce count */
113			*index = i;
114			++table->refs[i];
115			goto out;
116		}
117	}
118
119	if (free < 0) {
120		err = -ENOMEM;
121		goto out;
122	}
123
124	mlx4_dbg(dev, "Free MAC index is %d\n", free);
125
126	if (table->total == table->max) {
127		/* No free mac entries */
128		err = -ENOSPC;
129		goto out;
130	}
131
132	/* Register new MAC */
133	table->refs[free] = 1;
134	table->entries[free] = cpu_to_be64(mac | MLX4_MAC_VALID);
135
136	err = mlx4_set_port_mac_table(dev, port, table->entries);
137	if (unlikely(err)) {
138		mlx4_err(dev, "Failed adding MAC: 0x%llx\n", (unsigned long long) mac);
139		table->refs[free] = 0;
140		table->entries[free] = 0;
141		goto out;
142	}
143
144	*index = free;
145	++table->total;
146out:
147	mutex_unlock(&table->mutex);
148	return err;
149}
150EXPORT_SYMBOL_GPL(mlx4_register_mac);
151
152void mlx4_unregister_mac(struct mlx4_dev *dev, u8 port, int index)
153{
154	struct mlx4_mac_table *table = &mlx4_priv(dev)->port[port].mac_table;
155
156	mutex_lock(&table->mutex);
157	if (!table->refs[index]) {
158		mlx4_warn(dev, "No MAC entry for index %d\n", index);
159		goto out;
160	}
161	if (--table->refs[index]) {
162		mlx4_warn(dev, "Have more references for index %d,"
163			  "no need to modify MAC table\n", index);
164		goto out;
165	}
166	table->entries[index] = 0;
167	mlx4_set_port_mac_table(dev, port, table->entries);
168	--table->total;
169out:
170	mutex_unlock(&table->mutex);
171}
172EXPORT_SYMBOL_GPL(mlx4_unregister_mac);
173
174static int mlx4_set_port_vlan_table(struct mlx4_dev *dev, u8 port,
175				    __be32 *entries)
176{
177	struct mlx4_cmd_mailbox *mailbox;
178	u32 in_mod;
179	int err;
180
181	mailbox = mlx4_alloc_cmd_mailbox(dev);
182	if (IS_ERR(mailbox))
183		return PTR_ERR(mailbox);
184
185	memcpy(mailbox->buf, entries, MLX4_VLAN_TABLE_SIZE);
186	in_mod = MLX4_SET_PORT_VLAN_TABLE << 8 | port;
187	err = mlx4_cmd(dev, mailbox->dma, in_mod, 1, MLX4_CMD_SET_PORT,
188		       MLX4_CMD_TIME_CLASS_B);
189
190	mlx4_free_cmd_mailbox(dev, mailbox);
191
192	return err;
193}
194
195int mlx4_find_cached_vlan(struct mlx4_dev *dev, u8 port, u16 vid, int *idx)
196{
197	struct mlx4_vlan_table *table = &mlx4_priv(dev)->port[port].vlan_table;
198	int i;
199
200	for (i = 0; i < MLX4_MAX_VLAN_NUM; ++i) {
201		if (table->refs[i] &&
202		    (vid == (MLX4_VLAN_MASK &
203			      be32_to_cpu(table->entries[i])))) {
204			/* Vlan already registered, increase refernce count */
205			*idx = i;
206			return 0;
207		}
208	}
209
210	return -ENOENT;
211}
212EXPORT_SYMBOL_GPL(mlx4_find_cached_vlan);
213
214int mlx4_register_vlan(struct mlx4_dev *dev, u8 port, u16 vlan, int *index)
215{
216	struct mlx4_vlan_table *table = &mlx4_priv(dev)->port[port].vlan_table;
217	int i, err = 0;
218	int free = -1;
219
220	mutex_lock(&table->mutex);
221	for (i = MLX4_VLAN_REGULAR; i < MLX4_MAX_VLAN_NUM; i++) {
222		if (free < 0 && (table->refs[i] == 0)) {
223			free = i;
224			continue;
225		}
226
227		if (table->refs[i] &&
228		    (vlan == (MLX4_VLAN_MASK &
229			      be32_to_cpu(table->entries[i])))) {
230			/* Vlan already registered, increase refernce count */
231			*index = i;
232			++table->refs[i];
233			goto out;
234		}
235	}
236
237	if (free < 0) {
238		err = -ENOMEM;
239		goto out;
240	}
241
242	if (table->total == table->max) {
243		/* No free vlan entries */
244		err = -ENOSPC;
245		goto out;
246	}
247
248	/* Register new MAC */
249	table->refs[free] = 1;
250	table->entries[free] = cpu_to_be32(vlan | MLX4_VLAN_VALID);
251
252	err = mlx4_set_port_vlan_table(dev, port, table->entries);
253	if (unlikely(err)) {
254		mlx4_warn(dev, "Failed adding vlan: %u\n", vlan);
255		table->refs[free] = 0;
256		table->entries[free] = 0;
257		goto out;
258	}
259
260	*index = free;
261	++table->total;
262out:
263	mutex_unlock(&table->mutex);
264	return err;
265}
266EXPORT_SYMBOL_GPL(mlx4_register_vlan);
267
268void mlx4_unregister_vlan(struct mlx4_dev *dev, u8 port, int index)
269{
270	struct mlx4_vlan_table *table = &mlx4_priv(dev)->port[port].vlan_table;
271
272	if (index < MLX4_VLAN_REGULAR) {
273		mlx4_warn(dev, "Trying to free special vlan index %d\n", index);
274		return;
275	}
276
277	mutex_lock(&table->mutex);
278	if (!table->refs[index]) {
279		mlx4_warn(dev, "No vlan entry for index %d\n", index);
280		goto out;
281	}
282	if (--table->refs[index]) {
283		mlx4_dbg(dev, "Have more references for index %d,"
284			 "no need to modify vlan table\n", index);
285		goto out;
286	}
287	table->entries[index] = 0;
288	mlx4_set_port_vlan_table(dev, port, table->entries);
289	--table->total;
290out:
291	mutex_unlock(&table->mutex);
292}
293EXPORT_SYMBOL_GPL(mlx4_unregister_vlan);
294
295int mlx4_get_port_ib_caps(struct mlx4_dev *dev, u8 port, __be32 *caps)
296{
297	struct mlx4_cmd_mailbox *inmailbox, *outmailbox;
298	u8 *inbuf, *outbuf;
299	int err;
300
301	inmailbox = mlx4_alloc_cmd_mailbox(dev);
302	if (IS_ERR(inmailbox))
303		return PTR_ERR(inmailbox);
304
305	outmailbox = mlx4_alloc_cmd_mailbox(dev);
306	if (IS_ERR(outmailbox)) {
307		mlx4_free_cmd_mailbox(dev, inmailbox);
308		return PTR_ERR(outmailbox);
309	}
310
311	inbuf = inmailbox->buf;
312	outbuf = outmailbox->buf;
313	memset(inbuf, 0, 256);
314	memset(outbuf, 0, 256);
315	inbuf[0] = 1;
316	inbuf[1] = 1;
317	inbuf[2] = 1;
318	inbuf[3] = 1;
319	*(__be16 *) (&inbuf[16]) = cpu_to_be16(0x0015);
320	*(__be32 *) (&inbuf[20]) = cpu_to_be32(port);
321
322	err = mlx4_cmd_box(dev, inmailbox->dma, outmailbox->dma, port, 3,
323			   MLX4_CMD_MAD_IFC, MLX4_CMD_TIME_CLASS_C);
324	if (!err)
325		*caps = *(__be32 *) (outbuf + 84);
326	mlx4_free_cmd_mailbox(dev, inmailbox);
327	mlx4_free_cmd_mailbox(dev, outmailbox);
328	return err;
329}
330
331int mlx4_SET_PORT(struct mlx4_dev *dev, u8 port)
332{
333	struct mlx4_cmd_mailbox *mailbox;
334	int err;
335
336	if (dev->caps.port_type[port] != MLX4_PORT_TYPE_IB)
337		return 0;
338
339	mailbox = mlx4_alloc_cmd_mailbox(dev);
340	if (IS_ERR(mailbox))
341		return PTR_ERR(mailbox);
342
343	memset(mailbox->buf, 0, 256);
344
345	if (mlx4_ib_set_4k_mtu)
346		((__be32 *) mailbox->buf)[0] |= cpu_to_be32((1 << 22) | (1 << 21) | (5 << 12) | (2 << 4));
347
348	((__be32 *) mailbox->buf)[1] = dev->caps.ib_port_def_cap[port];
349	err = mlx4_cmd(dev, mailbox->dma, port, 0, MLX4_CMD_SET_PORT,
350		       MLX4_CMD_TIME_CLASS_B);
351
352	mlx4_free_cmd_mailbox(dev, mailbox);
353	return err;
354}
355