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1da177e4 LT |
1 | /* |
2 | * Copyright (c) 2004 Topspin Communications. 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 | * $Id: mthca_mcg.c 1349 2004-12-16 21:09:43Z roland $ | |
33 | */ | |
34 | ||
35 | #include <linux/init.h> | |
4e57b681 TS |
36 | #include <linux/string.h> |
37 | #include <linux/slab.h> | |
1da177e4 LT |
38 | |
39 | #include "mthca_dev.h" | |
40 | #include "mthca_cmd.h" | |
41 | ||
1da177e4 | 42 | struct mthca_mgm { |
97f52eb4 SH |
43 | __be32 next_gid_index; |
44 | u32 reserved[3]; | |
45 | u8 gid[16]; | |
46 | __be32 qp[MTHCA_QP_PER_MGM]; | |
1da177e4 LT |
47 | }; |
48 | ||
49 | static const u8 zero_gid[16]; /* automatically initialized to 0 */ | |
50 | ||
51 | /* | |
52 | * Caller must hold MCG table semaphore. gid and mgm parameters must | |
53 | * be properly aligned for command interface. | |
54 | * | |
55 | * Returns 0 unless a firmware command error occurs. | |
56 | * | |
57 | * If GID is found in MGM or MGM is empty, *index = *hash, *prev = -1 | |
58 | * and *mgm holds MGM entry. | |
59 | * | |
60 | * if GID is found in AMGM, *index = index in AMGM, *prev = index of | |
61 | * previous entry in hash chain and *mgm holds AMGM entry. | |
62 | * | |
63 | * If no AMGM exists for given gid, *index = -1, *prev = index of last | |
64 | * entry in hash chain and *mgm holds end of hash chain. | |
65 | */ | |
66 | static int find_mgm(struct mthca_dev *dev, | |
ed878458 | 67 | u8 *gid, struct mthca_mailbox *mgm_mailbox, |
1da177e4 LT |
68 | u16 *hash, int *prev, int *index) |
69 | { | |
ed878458 RD |
70 | struct mthca_mailbox *mailbox; |
71 | struct mthca_mgm *mgm = mgm_mailbox->buf; | |
1da177e4 LT |
72 | u8 *mgid; |
73 | int err; | |
74 | u8 status; | |
75 | ||
ed878458 RD |
76 | mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); |
77 | if (IS_ERR(mailbox)) | |
1da177e4 | 78 | return -ENOMEM; |
ed878458 | 79 | mgid = mailbox->buf; |
1da177e4 LT |
80 | |
81 | memcpy(mgid, gid, 16); | |
82 | ||
ed878458 | 83 | err = mthca_MGID_HASH(dev, mailbox, hash, &status); |
1da177e4 LT |
84 | if (err) |
85 | goto out; | |
86 | if (status) { | |
87 | mthca_err(dev, "MGID_HASH returned status %02x\n", status); | |
88 | err = -EINVAL; | |
89 | goto out; | |
90 | } | |
91 | ||
92 | if (0) | |
93 | mthca_dbg(dev, "Hash for %04x:%04x:%04x:%04x:" | |
94 | "%04x:%04x:%04x:%04x is %04x\n", | |
97f52eb4 SH |
95 | be16_to_cpu(((__be16 *) gid)[0]), |
96 | be16_to_cpu(((__be16 *) gid)[1]), | |
97 | be16_to_cpu(((__be16 *) gid)[2]), | |
98 | be16_to_cpu(((__be16 *) gid)[3]), | |
99 | be16_to_cpu(((__be16 *) gid)[4]), | |
100 | be16_to_cpu(((__be16 *) gid)[5]), | |
101 | be16_to_cpu(((__be16 *) gid)[6]), | |
102 | be16_to_cpu(((__be16 *) gid)[7]), | |
1da177e4 LT |
103 | *hash); |
104 | ||
105 | *index = *hash; | |
106 | *prev = -1; | |
107 | ||
108 | do { | |
ed878458 | 109 | err = mthca_READ_MGM(dev, *index, mgm_mailbox, &status); |
1da177e4 LT |
110 | if (err) |
111 | goto out; | |
112 | if (status) { | |
113 | mthca_err(dev, "READ_MGM returned status %02x\n", status); | |
5ceb7455 JM |
114 | err = -EINVAL; |
115 | goto out; | |
1da177e4 LT |
116 | } |
117 | ||
118 | if (!memcmp(mgm->gid, zero_gid, 16)) { | |
119 | if (*index != *hash) { | |
120 | mthca_err(dev, "Found zero MGID in AMGM.\n"); | |
121 | err = -EINVAL; | |
122 | } | |
123 | goto out; | |
124 | } | |
125 | ||
126 | if (!memcmp(mgm->gid, gid, 16)) | |
127 | goto out; | |
128 | ||
129 | *prev = *index; | |
5ceb7455 | 130 | *index = be32_to_cpu(mgm->next_gid_index) >> 6; |
1da177e4 LT |
131 | } while (*index); |
132 | ||
133 | *index = -1; | |
134 | ||
135 | out: | |
ed878458 | 136 | mthca_free_mailbox(dev, mailbox); |
1da177e4 LT |
137 | return err; |
138 | } | |
139 | ||
140 | int mthca_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid) | |
141 | { | |
142 | struct mthca_dev *dev = to_mdev(ibqp->device); | |
ed878458 | 143 | struct mthca_mailbox *mailbox; |
1da177e4 LT |
144 | struct mthca_mgm *mgm; |
145 | u16 hash; | |
146 | int index, prev; | |
147 | int link = 0; | |
148 | int i; | |
149 | int err; | |
150 | u8 status; | |
151 | ||
ed878458 RD |
152 | mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); |
153 | if (IS_ERR(mailbox)) | |
154 | return PTR_ERR(mailbox); | |
155 | mgm = mailbox->buf; | |
1da177e4 | 156 | |
5ceb7455 JM |
157 | if (down_interruptible(&dev->mcg_table.sem)) { |
158 | err = -EINTR; | |
159 | goto err_sem; | |
160 | } | |
1da177e4 | 161 | |
ed878458 | 162 | err = find_mgm(dev, gid->raw, mailbox, &hash, &prev, &index); |
1da177e4 LT |
163 | if (err) |
164 | goto out; | |
165 | ||
166 | if (index != -1) { | |
167 | if (!memcmp(mgm->gid, zero_gid, 16)) | |
168 | memcpy(mgm->gid, gid->raw, 16); | |
169 | } else { | |
170 | link = 1; | |
171 | ||
172 | index = mthca_alloc(&dev->mcg_table.alloc); | |
173 | if (index == -1) { | |
174 | mthca_err(dev, "No AMGM entries left\n"); | |
175 | err = -ENOMEM; | |
176 | goto out; | |
177 | } | |
178 | ||
ed878458 | 179 | err = mthca_READ_MGM(dev, index, mailbox, &status); |
1da177e4 LT |
180 | if (err) |
181 | goto out; | |
182 | if (status) { | |
183 | mthca_err(dev, "READ_MGM returned status %02x\n", status); | |
184 | err = -EINVAL; | |
185 | goto out; | |
186 | } | |
5ceb7455 | 187 | memset(mgm, 0, sizeof *mgm); |
1da177e4 | 188 | memcpy(mgm->gid, gid->raw, 16); |
1da177e4 LT |
189 | } |
190 | ||
191 | for (i = 0; i < MTHCA_QP_PER_MGM; ++i) | |
7150bf8a JM |
192 | if (mgm->qp[i] == cpu_to_be32(ibqp->qp_num | (1 << 31))) { |
193 | mthca_dbg(dev, "QP %06x already a member of MGM\n", | |
194 | ibqp->qp_num); | |
195 | err = 0; | |
196 | goto out; | |
197 | } else if (!(mgm->qp[i] & cpu_to_be32(1 << 31))) { | |
1da177e4 LT |
198 | mgm->qp[i] = cpu_to_be32(ibqp->qp_num | (1 << 31)); |
199 | break; | |
200 | } | |
201 | ||
202 | if (i == MTHCA_QP_PER_MGM) { | |
203 | mthca_err(dev, "MGM at index %x is full.\n", index); | |
204 | err = -ENOMEM; | |
205 | goto out; | |
206 | } | |
207 | ||
ed878458 | 208 | err = mthca_WRITE_MGM(dev, index, mailbox, &status); |
1da177e4 LT |
209 | if (err) |
210 | goto out; | |
211 | if (status) { | |
212 | mthca_err(dev, "WRITE_MGM returned status %02x\n", status); | |
213 | err = -EINVAL; | |
5ceb7455 | 214 | goto out; |
1da177e4 LT |
215 | } |
216 | ||
217 | if (!link) | |
218 | goto out; | |
219 | ||
ed878458 | 220 | err = mthca_READ_MGM(dev, prev, mailbox, &status); |
1da177e4 LT |
221 | if (err) |
222 | goto out; | |
223 | if (status) { | |
224 | mthca_err(dev, "READ_MGM returned status %02x\n", status); | |
225 | err = -EINVAL; | |
226 | goto out; | |
227 | } | |
228 | ||
5ceb7455 | 229 | mgm->next_gid_index = cpu_to_be32(index << 6); |
1da177e4 | 230 | |
ed878458 | 231 | err = mthca_WRITE_MGM(dev, prev, mailbox, &status); |
1da177e4 LT |
232 | if (err) |
233 | goto out; | |
234 | if (status) { | |
235 | mthca_err(dev, "WRITE_MGM returned status %02x\n", status); | |
236 | err = -EINVAL; | |
237 | } | |
238 | ||
239 | out: | |
5ceb7455 JM |
240 | if (err && link && index != -1) { |
241 | BUG_ON(index < dev->limits.num_mgms); | |
242 | mthca_free(&dev->mcg_table.alloc, index); | |
243 | } | |
1da177e4 | 244 | up(&dev->mcg_table.sem); |
5ceb7455 | 245 | err_sem: |
ed878458 | 246 | mthca_free_mailbox(dev, mailbox); |
1da177e4 LT |
247 | return err; |
248 | } | |
249 | ||
250 | int mthca_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid) | |
251 | { | |
252 | struct mthca_dev *dev = to_mdev(ibqp->device); | |
ed878458 | 253 | struct mthca_mailbox *mailbox; |
1da177e4 LT |
254 | struct mthca_mgm *mgm; |
255 | u16 hash; | |
256 | int prev, index; | |
257 | int i, loc; | |
258 | int err; | |
259 | u8 status; | |
260 | ||
ed878458 RD |
261 | mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); |
262 | if (IS_ERR(mailbox)) | |
263 | return PTR_ERR(mailbox); | |
264 | mgm = mailbox->buf; | |
1da177e4 | 265 | |
5ceb7455 JM |
266 | if (down_interruptible(&dev->mcg_table.sem)) { |
267 | err = -EINTR; | |
268 | goto err_sem; | |
269 | } | |
1da177e4 | 270 | |
ed878458 | 271 | err = find_mgm(dev, gid->raw, mailbox, &hash, &prev, &index); |
1da177e4 LT |
272 | if (err) |
273 | goto out; | |
274 | ||
275 | if (index == -1) { | |
276 | mthca_err(dev, "MGID %04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x " | |
277 | "not found\n", | |
97f52eb4 SH |
278 | be16_to_cpu(((__be16 *) gid->raw)[0]), |
279 | be16_to_cpu(((__be16 *) gid->raw)[1]), | |
280 | be16_to_cpu(((__be16 *) gid->raw)[2]), | |
281 | be16_to_cpu(((__be16 *) gid->raw)[3]), | |
282 | be16_to_cpu(((__be16 *) gid->raw)[4]), | |
283 | be16_to_cpu(((__be16 *) gid->raw)[5]), | |
284 | be16_to_cpu(((__be16 *) gid->raw)[6]), | |
285 | be16_to_cpu(((__be16 *) gid->raw)[7])); | |
1da177e4 LT |
286 | err = -EINVAL; |
287 | goto out; | |
288 | } | |
289 | ||
290 | for (loc = -1, i = 0; i < MTHCA_QP_PER_MGM; ++i) { | |
291 | if (mgm->qp[i] == cpu_to_be32(ibqp->qp_num | (1 << 31))) | |
292 | loc = i; | |
293 | if (!(mgm->qp[i] & cpu_to_be32(1 << 31))) | |
294 | break; | |
295 | } | |
296 | ||
297 | if (loc == -1) { | |
298 | mthca_err(dev, "QP %06x not found in MGM\n", ibqp->qp_num); | |
299 | err = -EINVAL; | |
300 | goto out; | |
301 | } | |
302 | ||
303 | mgm->qp[loc] = mgm->qp[i - 1]; | |
304 | mgm->qp[i - 1] = 0; | |
305 | ||
ed878458 | 306 | err = mthca_WRITE_MGM(dev, index, mailbox, &status); |
1da177e4 LT |
307 | if (err) |
308 | goto out; | |
309 | if (status) { | |
310 | mthca_err(dev, "WRITE_MGM returned status %02x\n", status); | |
311 | err = -EINVAL; | |
312 | goto out; | |
313 | } | |
314 | ||
315 | if (i != 1) | |
316 | goto out; | |
317 | ||
1da177e4 LT |
318 | if (prev == -1) { |
319 | /* Remove entry from MGM */ | |
5ceb7455 JM |
320 | int amgm_index_to_free = be32_to_cpu(mgm->next_gid_index) >> 6; |
321 | if (amgm_index_to_free) { | |
322 | err = mthca_READ_MGM(dev, amgm_index_to_free, | |
ed878458 | 323 | mailbox, &status); |
1da177e4 LT |
324 | if (err) |
325 | goto out; | |
326 | if (status) { | |
327 | mthca_err(dev, "READ_MGM returned status %02x\n", | |
328 | status); | |
329 | err = -EINVAL; | |
330 | goto out; | |
331 | } | |
332 | } else | |
333 | memset(mgm->gid, 0, 16); | |
334 | ||
ed878458 | 335 | err = mthca_WRITE_MGM(dev, index, mailbox, &status); |
1da177e4 LT |
336 | if (err) |
337 | goto out; | |
338 | if (status) { | |
339 | mthca_err(dev, "WRITE_MGM returned status %02x\n", status); | |
340 | err = -EINVAL; | |
341 | goto out; | |
342 | } | |
5ceb7455 JM |
343 | if (amgm_index_to_free) { |
344 | BUG_ON(amgm_index_to_free < dev->limits.num_mgms); | |
345 | mthca_free(&dev->mcg_table.alloc, amgm_index_to_free); | |
346 | } | |
1da177e4 LT |
347 | } else { |
348 | /* Remove entry from AMGM */ | |
5ceb7455 | 349 | int curr_next_index = be32_to_cpu(mgm->next_gid_index) >> 6; |
ed878458 | 350 | err = mthca_READ_MGM(dev, prev, mailbox, &status); |
1da177e4 LT |
351 | if (err) |
352 | goto out; | |
353 | if (status) { | |
354 | mthca_err(dev, "READ_MGM returned status %02x\n", status); | |
355 | err = -EINVAL; | |
356 | goto out; | |
357 | } | |
358 | ||
5ceb7455 | 359 | mgm->next_gid_index = cpu_to_be32(curr_next_index << 6); |
1da177e4 | 360 | |
ed878458 | 361 | err = mthca_WRITE_MGM(dev, prev, mailbox, &status); |
1da177e4 LT |
362 | if (err) |
363 | goto out; | |
364 | if (status) { | |
365 | mthca_err(dev, "WRITE_MGM returned status %02x\n", status); | |
366 | err = -EINVAL; | |
367 | goto out; | |
368 | } | |
5ceb7455 JM |
369 | BUG_ON(index < dev->limits.num_mgms); |
370 | mthca_free(&dev->mcg_table.alloc, index); | |
1da177e4 LT |
371 | } |
372 | ||
373 | out: | |
374 | up(&dev->mcg_table.sem); | |
5ceb7455 | 375 | err_sem: |
ed878458 | 376 | mthca_free_mailbox(dev, mailbox); |
1da177e4 LT |
377 | return err; |
378 | } | |
379 | ||
380 | int __devinit mthca_init_mcg_table(struct mthca_dev *dev) | |
381 | { | |
382 | int err; | |
5ceb7455 | 383 | int table_size = dev->limits.num_mgms + dev->limits.num_amgms; |
1da177e4 LT |
384 | |
385 | err = mthca_alloc_init(&dev->mcg_table.alloc, | |
5ceb7455 JM |
386 | table_size, |
387 | table_size - 1, | |
388 | dev->limits.num_mgms); | |
1da177e4 LT |
389 | if (err) |
390 | return err; | |
391 | ||
392 | init_MUTEX(&dev->mcg_table.sem); | |
393 | ||
394 | return 0; | |
395 | } | |
396 | ||
397 | void __devexit mthca_cleanup_mcg_table(struct mthca_dev *dev) | |
398 | { | |
399 | mthca_alloc_cleanup(&dev->mcg_table.alloc); | |
400 | } |