tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
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
46void 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
59void 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
72static 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
93int 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
115 if (free < 0) {
116 err = -ENOMEM;
117 goto out;
118 }
119
120 mlx4_dbg(dev, "Free MAC index is %d\n", free);
121
122 if (table->total == table->max) {
123 /* No free mac entries */
124 err = -ENOSPC;
125 goto out;
126 }
127
128 /* Register new MAC */
129 table->refs[free] = 1;
130 table->entries[free] = cpu_to_be64(mac | MLX4_MAC_VALID);
131
132 err = mlx4_set_port_mac_table(dev, port, table->entries);
133 if (unlikely(err)) {
134 mlx4_err(dev, "Failed adding MAC: 0x%llx\n", (unsigned long long) mac);
135 table->refs[free] = 0;
136 table->entries[free] = 0;
137 goto out;
138 }
139
140 *index = free;
141 ++table->total;
142out:
143 mutex_unlock(&table->mutex);
144 return err;
145}
146EXPORT_SYMBOL_GPL(mlx4_register_mac);
147
148void mlx4_unregister_mac(struct mlx4_dev *dev, u8 port, int index)
149{
150 struct mlx4_mac_table *table = &mlx4_priv(dev)->port[port].mac_table;
151
152 mutex_lock(&table->mutex);
153 if (!table->refs[index]) {
154 mlx4_warn(dev, "No MAC entry for index %d\n", index);
155 goto out;
156 }
157 if (--table->refs[index]) {
158 mlx4_warn(dev, "Have more references for index %d,"
159 "no need to modify MAC table\n", index);
160 goto out;
161 }
162 table->entries[index] = 0;
163 mlx4_set_port_mac_table(dev, port, table->entries);
164 --table->total;
165out:
166 mutex_unlock(&table->mutex);
167}
168EXPORT_SYMBOL_GPL(mlx4_unregister_mac);
169
170static int mlx4_set_port_vlan_table(struct mlx4_dev *dev, u8 port,
171 __be32 *entries)
172{
173 struct mlx4_cmd_mailbox *mailbox;
174 u32 in_mod;
175 int err;
176
177 mailbox = mlx4_alloc_cmd_mailbox(dev);
178 if (IS_ERR(mailbox))
179 return PTR_ERR(mailbox);
180
181 memcpy(mailbox->buf, entries, MLX4_VLAN_TABLE_SIZE);
182 in_mod = MLX4_SET_PORT_VLAN_TABLE << 8 | port;
183 err = mlx4_cmd(dev, mailbox->dma, in_mod, 1, MLX4_CMD_SET_PORT,
184 MLX4_CMD_TIME_CLASS_B);
185
186 mlx4_free_cmd_mailbox(dev, mailbox);
187
188 return err;
189}
190
191int mlx4_find_cached_vlan(struct mlx4_dev *dev, u8 port, u16 vid, int *idx)
192{
193 struct mlx4_vlan_table *table = &mlx4_priv(dev)->port[port].vlan_table;
194 int i;
195
196 for (i = 0; i < MLX4_MAX_VLAN_NUM; ++i) {
197 if (table->refs[i] &&
198 (vid == (MLX4_VLAN_MASK &
199 be32_to_cpu(table->entries[i])))) {
200 /* VLAN already registered, increase reference count */
201 *idx = i;
202 return 0;
203 }
204 }
205
206 return -ENOENT;
207}
208EXPORT_SYMBOL_GPL(mlx4_find_cached_vlan);
209
210int mlx4_register_vlan(struct mlx4_dev *dev, u8 port, u16 vlan, int *index)
211{
212 struct mlx4_vlan_table *table = &mlx4_priv(dev)->port[port].vlan_table;
213 int i, err = 0;
214 int free = -1;
215
216 mutex_lock(&table->mutex);
217 for (i = MLX4_VLAN_REGULAR; i < MLX4_MAX_VLAN_NUM; i++) {
218 if (free < 0 && (table->refs[i] == 0)) {
219 free = i;
220 continue;
221 }
222
223 if (table->refs[i] &&
224 (vlan == (MLX4_VLAN_MASK &
225 be32_to_cpu(table->entries[i])))) {
226 /* Vlan already registered, increase refernce count */
227 *index = i;
228 ++table->refs[i];
229 goto out;
230 }
231 }
232
233 if (free < 0) {
234 err = -ENOMEM;
235 goto out;
236 }
237
238 if (table->total == table->max) {
239 /* No free vlan entries */
240 err = -ENOSPC;
241 goto out;
242 }
243
244 /* Register new MAC */
245 table->refs[free] = 1;
246 table->entries[free] = cpu_to_be32(vlan | MLX4_VLAN_VALID);
247
248 err = mlx4_set_port_vlan_table(dev, port, table->entries);
249 if (unlikely(err)) {
250 mlx4_warn(dev, "Failed adding vlan: %u\n", vlan);
251 table->refs[free] = 0;
252 table->entries[free] = 0;
253 goto out;
254 }
255
256 *index = free;
257 ++table->total;
258out:
259 mutex_unlock(&table->mutex);
260 return err;
261}
262EXPORT_SYMBOL_GPL(mlx4_register_vlan);
263
264void mlx4_unregister_vlan(struct mlx4_dev *dev, u8 port, int index)
265{
266 struct mlx4_vlan_table *table = &mlx4_priv(dev)->port[port].vlan_table;
267
268 if (index < MLX4_VLAN_REGULAR) {
269 mlx4_warn(dev, "Trying to free special vlan index %d\n", index);
270 return;
271 }
272
273 mutex_lock(&table->mutex);
274 if (!table->refs[index]) {
275 mlx4_warn(dev, "No vlan entry for index %d\n", index);
276 goto out;
277 }
278 if (--table->refs[index]) {
279 mlx4_dbg(dev, "Have more references for index %d,"
280 "no need to modify vlan table\n", index);
281 goto out;
282 }
283 table->entries[index] = 0;
284 mlx4_set_port_vlan_table(dev, port, table->entries);
285 --table->total;
286out:
287 mutex_unlock(&table->mutex);
288}
289EXPORT_SYMBOL_GPL(mlx4_unregister_vlan);
290
291int mlx4_get_port_ib_caps(struct mlx4_dev *dev, u8 port, __be32 *caps)
292{
293 struct mlx4_cmd_mailbox *inmailbox, *outmailbox;
294 u8 *inbuf, *outbuf;
295 int err;
296
297 inmailbox = mlx4_alloc_cmd_mailbox(dev);
298 if (IS_ERR(inmailbox))
299 return PTR_ERR(inmailbox);
300
301 outmailbox = mlx4_alloc_cmd_mailbox(dev);
302 if (IS_ERR(outmailbox)) {
303 mlx4_free_cmd_mailbox(dev, inmailbox);
304 return PTR_ERR(outmailbox);
305 }
306
307 inbuf = inmailbox->buf;
308 outbuf = outmailbox->buf;
309 memset(inbuf, 0, 256);
310 memset(outbuf, 0, 256);
311 inbuf[0] = 1;
312 inbuf[1] = 1;
313 inbuf[2] = 1;
314 inbuf[3] = 1;
315 *(__be16 *) (&inbuf[16]) = cpu_to_be16(0x0015);
316 *(__be32 *) (&inbuf[20]) = cpu_to_be32(port);
317
318 err = mlx4_cmd_box(dev, inmailbox->dma, outmailbox->dma, port, 3,
319 MLX4_CMD_MAD_IFC, MLX4_CMD_TIME_CLASS_C);
320 if (!err)
321 *caps = *(__be32 *) (outbuf + 84);
322 mlx4_free_cmd_mailbox(dev, inmailbox);
323 mlx4_free_cmd_mailbox(dev, outmailbox);
324 return err;
325}
326
327int mlx4_SET_PORT(struct mlx4_dev *dev, u8 port)
328{
329 struct mlx4_cmd_mailbox *mailbox;
330 int err;
331
332 if (dev->caps.port_type[port] == MLX4_PORT_TYPE_ETH)
333 return 0;
334
335 mailbox = mlx4_alloc_cmd_mailbox(dev);
336 if (IS_ERR(mailbox))
337 return PTR_ERR(mailbox);
338
339 memset(mailbox->buf, 0, 256);
340
341 ((__be32 *) mailbox->buf)[1] = dev->caps.ib_port_def_cap[port];
342 err = mlx4_cmd(dev, mailbox->dma, port, 0, MLX4_CMD_SET_PORT,
343 MLX4_CMD_TIME_CLASS_B);
344
345 mlx4_free_cmd_mailbox(dev, mailbox);
346 return err;
347}