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1 /*

4 *

5 * This software is available to you under a choice of one of two

6 * licenses. You may choose to be licensed under the terms of the GNU

7 * General Public License (GPL) Version 2, available from the file

8 * COPYING in the main directory of this source tree, or the

9 * OpenIB.org BSD license below:

10 *

11 * Redistribution and use in source and binary forms, with or

12 * without modification, are permitted provided that the following

13 * conditions are met:

14 *

15 * - Redistributions of source code must retain the above

16 * copyright notice, this list of conditions and the following

17 * disclaimer.

18 *

19 * - Redistributions in binary form must reproduce the above

20 * copyright notice, this list of conditions and the following

21 * disclaimer in the documentation and/or other materials

22 * provided with the distribution.

23 *

24 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

25 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

26 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

27 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS

28 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN

29 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN

30 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE

31 * SOFTWARE.

32 */

33

34 #include <linux/string.h>

35 #include <linux/etherdevice.h>

36

37 #include <linux/mlx4/cmd.h>

38 #include <linux/export.h>

39

40 #include "mlx4.h"

41

42 #define MGM_QPN_MASK 0x00FFFFFF

43 #define MGM_BLCK_LB_BIT 30

44

45 static const u8 zero_gid[16]; /* automatically initialized to 0 */

46

47 struct mlx4_mgm {

48 __be32 next_gid_index;

49 __be32 members_count;

50 u32 reserved[2];

51 u8 gid[16];

52 __be32 qp[MLX4_MAX_QP_PER_MGM];

53 };

54

55 int mlx4_get_mgm_entry_size(struct mlx4_dev *dev)

56 {

57 return min((1 << mlx4_log_num_mgm_entry_size), MLX4_MAX_MGM_ENTRY_SIZE);

58 }

59

60 int mlx4_get_qp_per_mgm(struct mlx4_dev *dev)

61 {

62 return 4 * (mlx4_get_mgm_entry_size(dev) / 16 - 2);

63 }

64

65 static int mlx4_READ_ENTRY(struct mlx4_dev *dev, int index,

66 struct mlx4_cmd_mailbox *mailbox)

67 {

68 return mlx4_cmd_box(dev, 0, mailbox->dma, index, 0, MLX4_CMD_READ_MCG,

69 MLX4_CMD_TIME_CLASS_A, MLX4_CMD_NATIVE);

70 }

71

72 static int mlx4_WRITE_ENTRY(struct mlx4_dev *dev, int index,

73 struct mlx4_cmd_mailbox *mailbox)

74 {

75 return mlx4_cmd(dev, mailbox->dma, index, 0, MLX4_CMD_WRITE_MCG,

76 MLX4_CMD_TIME_CLASS_A, MLX4_CMD_NATIVE);

77 }

78

79 static int mlx4_WRITE_PROMISC(struct mlx4_dev *dev, u8 port, u8 steer,

80 struct mlx4_cmd_mailbox *mailbox)

81 {

82 u32 in_mod;

83

84 in_mod = (u32) port << 16 | steer << 1;

85 return mlx4_cmd(dev, mailbox->dma, in_mod, 0x1,

86 MLX4_CMD_WRITE_MCG, MLX4_CMD_TIME_CLASS_A,

87 MLX4_CMD_NATIVE);

88 }

89

90 static int mlx4_GID_HASH(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,

91 u16 *hash, u8 op_mod)

92 {

93 u64 imm;

94 int err;

95

96 err = mlx4_cmd_imm(dev, mailbox->dma, &imm, 0, op_mod,

97 MLX4_CMD_MGID_HASH, MLX4_CMD_TIME_CLASS_A,

98 MLX4_CMD_NATIVE);

99

100 if (!err)

101 *hash = imm;

102

103 return err;

104 }

105

106 static struct mlx4_promisc_qp *get_promisc_qp(struct mlx4_dev *dev, u8 pf_num,

107 enum mlx4_steer_type steer,

108 u32 qpn)

109 {

110 struct mlx4_steer *s_steer = &mlx4_priv(dev)->steer[pf_num];

111 struct mlx4_promisc_qp *pqp;

112

113 list_for_each_entry(pqp, &s_steer->promisc_qps[steer], list) {

114 if (pqp->qpn == qpn)

115 return pqp;

116 }

117 /* not found */

118 return NULL;

119 }

120

121 /*

122 * Add new entry to steering data structure.

123 * All promisc QPs should be added as well

124 */

125 static int new_steering_entry(struct mlx4_dev *dev, u8 port,

126 enum mlx4_steer_type steer,

127 unsigned int index, u32 qpn)

128 {

129 struct mlx4_steer *s_steer;

130 struct mlx4_cmd_mailbox *mailbox;

131 struct mlx4_mgm *mgm;

132 u32 members_count;

133 struct mlx4_steer_index *new_entry;

134 struct mlx4_promisc_qp *pqp;

135 struct mlx4_promisc_qp *dqp = NULL;

136 u32 prot;

137 int err;

138

139 s_steer = &mlx4_priv(dev)->steer[port - 1];

140 new_entry = kzalloc(sizeof *new_entry, GFP_KERNEL);

141 if (!new_entry)

142 return -ENOMEM;

143

144 INIT_LIST_HEAD(&new_entry->duplicates);

145 new_entry->index = index;

146 list_add_tail(&new_entry->list, &s_steer->steer_entries[steer]);

147

148 /* If the given qpn is also a promisc qp,

149 * it should be inserted to duplicates list

150 */

151 pqp = get_promisc_qp(dev, 0, steer, qpn);

152 if (pqp) {

153 dqp = kmalloc(sizeof *dqp, GFP_KERNEL);

154 if (!dqp) {

155 err = -ENOMEM;

156 goto out_alloc;

157 }

158 dqp->qpn = qpn;

159 list_add_tail(&dqp->list, &new_entry->duplicates);

160 }

161

162 /* if no promisc qps for this vep, we are done */

163 if (list_empty(&s_steer->promisc_qps[steer]))

164 return 0;

165

166 /* now need to add all the promisc qps to the new

167 * steering entry, as they should also receive the packets

168 * destined to this address */

169 mailbox = mlx4_alloc_cmd_mailbox(dev);

170 if (IS_ERR(mailbox)) {

171 err = -ENOMEM;

172 goto out_alloc;

173 }

174 mgm = mailbox->buf;

175

176 err = mlx4_READ_ENTRY(dev, index, mailbox);

177 if (err)

178 goto out_mailbox;

179

180 members_count = be32_to_cpu(mgm->members_count) & 0xffffff;

181 prot = be32_to_cpu(mgm->members_count) >> 30;

182 list_for_each_entry(pqp, &s_steer->promisc_qps[steer], list) {

183 /* don't add already existing qpn */

184 if (pqp->qpn == qpn)

185 continue;

186 if (members_count == dev->caps.num_qp_per_mgm) {

187 /* out of space */

188 err = -ENOMEM;

189 goto out_mailbox;

190 }

191

192 /* add the qpn */

193 mgm->qp[members_count++] = cpu_to_be32(pqp->qpn & MGM_QPN_MASK);

194 }

195 /* update the qps count and update the entry with all the promisc qps*/

196 mgm->members_count = cpu_to_be32(members_count | (prot << 30));

197 err = mlx4_WRITE_ENTRY(dev, index, mailbox);

198

199 out_mailbox:

200 mlx4_free_cmd_mailbox(dev, mailbox);

201 if (!err)

202 return 0;

203 out_alloc:

204 if (dqp) {

205 list_del(&dqp->list);

206 kfree(dqp);

207 }

208 list_del(&new_entry->list);

209 kfree(new_entry);

210 return err;

211 }

212

213 /* update the data structures with existing steering entry */

214 static int existing_steering_entry(struct mlx4_dev *dev, u8 port,

215 enum mlx4_steer_type steer,

216 unsigned int index, u32 qpn)

217 {

218 struct mlx4_steer *s_steer;

219 struct mlx4_steer_index *tmp_entry, *entry = NULL;

220 struct mlx4_promisc_qp *pqp;

221 struct mlx4_promisc_qp *dqp;

222

223 s_steer = &mlx4_priv(dev)->steer[port - 1];

224

225 pqp = get_promisc_qp(dev, 0, steer, qpn);

226 if (!pqp)

227 return 0; /* nothing to do */

228

229 list_for_each_entry(tmp_entry, &s_steer->steer_entries[steer], list) {

230 if (tmp_entry->index == index) {

231 entry = tmp_entry;

232 break;

233 }

234 }

235 if (unlikely(!entry)) {

236 mlx4_warn(dev, "Steering entry at index %x is not registered\n", index);

237 return -EINVAL;

238 }

239

240 /* the given qpn is listed as a promisc qpn

241 * we need to add it as a duplicate to this entry

242 * for future references */

243 list_for_each_entry(dqp, &entry->duplicates, list) {

244 if (qpn == pqp->qpn)

245 return 0; /* qp is already duplicated */

246 }

247

248 /* add the qp as a duplicate on this index */

249 dqp = kmalloc(sizeof *dqp, GFP_KERNEL);

250 if (!dqp)

251 return -ENOMEM;

252 dqp->qpn = qpn;

253 list_add_tail(&dqp->list, &entry->duplicates);

254

255 return 0;

256 }

257

258 /* Check whether a qpn is a duplicate on steering entry

259 * If so, it should not be removed from mgm */

260 static bool check_duplicate_entry(struct mlx4_dev *dev, u8 port,

261 enum mlx4_steer_type steer,

262 unsigned int index, u32 qpn)

263 {

264 struct mlx4_steer *s_steer;

265 struct mlx4_steer_index *tmp_entry, *entry = NULL;

266 struct mlx4_promisc_qp *dqp, *tmp_dqp;

267

268 s_steer = &mlx4_priv(dev)->steer[port - 1];

269

270 /* if qp is not promisc, it cannot be duplicated */

271 if (!get_promisc_qp(dev, 0, steer, qpn))

272 return false;

273

274 /* The qp is promisc qp so it is a duplicate on this index

275 * Find the index entry, and remove the duplicate */

276 list_for_each_entry(tmp_entry, &s_steer->steer_entries[steer], list) {

277 if (tmp_entry->index == index) {

278 entry = tmp_entry;

279 break;

280 }

281 }

282 if (unlikely(!entry)) {

283 mlx4_warn(dev, "Steering entry for index %x is not registered\n", index);

284 return false;

285 }

286 list_for_each_entry_safe(dqp, tmp_dqp, &entry->duplicates, list) {

287 if (dqp->qpn == qpn) {

288 list_del(&dqp->list);

289 kfree(dqp);

290 }

291 }

292 return true;

293 }

294

295 /* I a steering entry contains only promisc QPs, it can be removed. */

296 static bool can_remove_steering_entry(struct mlx4_dev *dev, u8 port,

297 enum mlx4_steer_type steer,

298 unsigned int index, u32 tqpn)

299 {

300 struct mlx4_steer *s_steer;

301 struct mlx4_cmd_mailbox *mailbox;

302 struct mlx4_mgm *mgm;

303 struct mlx4_steer_index *entry = NULL, *tmp_entry;

304 u32 qpn;

305 u32 members_count;

306 bool ret = false;

307 int i;

308

309 s_steer = &mlx4_priv(dev)->steer[port - 1];

310

311 mailbox = mlx4_alloc_cmd_mailbox(dev);

312 if (IS_ERR(mailbox))

313 return false;

314 mgm = mailbox->buf;

315

316 if (mlx4_READ_ENTRY(dev, index, mailbox))

317 goto out;

318 members_count = be32_to_cpu(mgm->members_count) & 0xffffff;

319 for (i = 0; i < members_count; i++) {

320 qpn = be32_to_cpu(mgm->qp[i]) & MGM_QPN_MASK;

321 if (!get_promisc_qp(dev, 0, steer, qpn) && qpn != tqpn) {

322 /* the qp is not promisc, the entry can't be removed */

323 goto out;

324 }

325 }

326 /* All the qps currently registered for this entry are promiscuous,

327 * Checking for duplicates */

328 ret = true;

329 list_for_each_entry_safe(entry, tmp_entry, &s_steer->steer_entries[steer], list) {

330 if (entry->index == index) {

331 if (list_empty(&entry->duplicates)) {

332 list_del(&entry->list);

333 kfree(entry);

334 } else {

335 /* This entry contains duplicates so it shouldn't be removed */

336 ret = false;

337 goto out;

338 }

339 }

340 }

341

342 out:

343 mlx4_free_cmd_mailbox(dev, mailbox);

344 return ret;

345 }

346

347 static int add_promisc_qp(struct mlx4_dev *dev, u8 port,

348 enum mlx4_steer_type steer, u32 qpn)

349 {

350 struct mlx4_steer *s_steer;

351 struct mlx4_cmd_mailbox *mailbox;

352 struct mlx4_mgm *mgm;

353 struct mlx4_steer_index *entry;

354 struct mlx4_promisc_qp *pqp;

355 struct mlx4_promisc_qp *dqp;

356 u32 members_count;

357 u32 prot;

358 int i;

359 bool found;

360 int last_index;

361 int err;

362 struct mlx4_priv *priv = mlx4_priv(dev);

363

364 s_steer = &mlx4_priv(dev)->steer[port - 1];

365

366 mutex_lock(&priv->mcg_table.mutex);

367

368 if (get_promisc_qp(dev, 0, steer, qpn)) {

369 err = 0; /* Noting to do, already exists */

370 goto out_mutex;

371 }

372

373 pqp = kmalloc(sizeof *pqp, GFP_KERNEL);

374 if (!pqp) {

375 err = -ENOMEM;

376 goto out_mutex;

377 }

378 pqp->qpn = qpn;

379

380 mailbox = mlx4_alloc_cmd_mailbox(dev);

381 if (IS_ERR(mailbox)) {

382 err = -ENOMEM;

383 goto out_alloc;

384 }

385 mgm = mailbox->buf;

386

387 /* the promisc qp needs to be added for each one of the steering

388 * entries, if it already exists, needs to be added as a duplicate

389 * for this entry */

390 list_for_each_entry(entry, &s_steer->steer_entries[steer], list) {

391 err = mlx4_READ_ENTRY(dev, entry->index, mailbox);

392 if (err)

393 goto out_mailbox;

394

395 members_count = be32_to_cpu(mgm->members_count) & 0xffffff;

396 prot = be32_to_cpu(mgm->members_count) >> 30;

397 found = false;

398 for (i = 0; i < members_count; i++) {

399 if ((be32_to_cpu(mgm->qp[i]) & MGM_QPN_MASK) == qpn) {

400 /* Entry already exists, add to duplicates */

401 dqp = kmalloc(sizeof *dqp, GFP_KERNEL);

402 if (!dqp)

403 goto out_mailbox;

404 dqp->qpn = qpn;

405 list_add_tail(&dqp->list, &entry->duplicates);

406 found = true;

407 }

408 }

409 if (!found) {

410 /* Need to add the qpn to mgm */

411 if (members_count == dev->caps.num_qp_per_mgm) {

412 /* entry is full */

413 err = -ENOMEM;

414 goto out_mailbox;

415 }

416 mgm->qp[members_count++] = cpu_to_be32(qpn & MGM_QPN_MASK);

417 mgm->members_count = cpu_to_be32(members_count | (prot << 30));

418 err = mlx4_WRITE_ENTRY(dev, entry->index, mailbox);

419 if (err)

420 goto out_mailbox;

421 }

422 last_index = entry->index;

423 }

424

425 /* add the new qpn to list of promisc qps */

426 list_add_tail(&pqp->list, &s_steer->promisc_qps[steer]);

427 /* now need to add all the promisc qps to default entry */

428 memset(mgm, 0, sizeof *mgm);

429 members_count = 0;

430 list_for_each_entry(dqp, &s_steer->promisc_qps[steer], list)

431 mgm->qp[members_count++] = cpu_to_be32(dqp->qpn & MGM_QPN_MASK);

432 mgm->members_count = cpu_to_be32(members_count | MLX4_PROT_ETH << 30);

433

434 err = mlx4_WRITE_PROMISC(dev, port, steer, mailbox);

435 if (err)

436 goto out_list;

437

438 mlx4_free_cmd_mailbox(dev, mailbox);

439 mutex_unlock(&priv->mcg_table.mutex);

440 return 0;

441

442 out_list:

443 list_del(&pqp->list);

444 out_mailbox:

445 mlx4_free_cmd_mailbox(dev, mailbox);

446 out_alloc:

447 kfree(pqp);

448 out_mutex:

449 mutex_unlock(&priv->mcg_table.mutex);

450 return err;

451 }

452

453 static int remove_promisc_qp(struct mlx4_dev *dev, u8 port,

454 enum mlx4_steer_type steer, u32 qpn)

455 {

456 struct mlx4_priv *priv = mlx4_priv(dev);

457 struct mlx4_steer *s_steer;

458 struct mlx4_cmd_mailbox *mailbox;

459 struct mlx4_mgm *mgm;

460 struct mlx4_steer_index *entry;

461 struct mlx4_promisc_qp *pqp;

462 struct mlx4_promisc_qp *dqp;

463 u32 members_count;

464 bool found;

465 bool back_to_list = false;

466 int loc, i;

467 int err;

468

469 s_steer = &mlx4_priv(dev)->steer[port - 1];

470 mutex_lock(&priv->mcg_table.mutex);

471

472 pqp = get_promisc_qp(dev, 0, steer, qpn);

473 if (unlikely(!pqp)) {

474 mlx4_warn(dev, "QP %x is not promiscuous QP\n", qpn);

475 /* nothing to do */

476 err = 0;

477 goto out_mutex;

478 }

479

480 /*remove from list of promisc qps */

481 list_del(&pqp->list);

482

483 /* set the default entry not to include the removed one */

484 mailbox = mlx4_alloc_cmd_mailbox(dev);

485 if (IS_ERR(mailbox)) {

486 err = -ENOMEM;

487 back_to_list = true;

488 goto out_list;

489 }

490 mgm = mailbox->buf;

491 memset(mgm, 0, sizeof *mgm);

492 members_count = 0;

493 list_for_each_entry(dqp, &s_steer->promisc_qps[steer], list)

494 mgm->qp[members_count++] = cpu_to_be32(dqp->qpn & MGM_QPN_MASK);

495 mgm->members_count = cpu_to_be32(members_count | MLX4_PROT_ETH << 30);

496

497 err = mlx4_WRITE_PROMISC(dev, port, steer, mailbox);

498 if (err)

499 goto out_mailbox;

500

501 /* remove the qp from all the steering entries*/

502 list_for_each_entry(entry, &s_steer->steer_entries[steer], list) {

503 found = false;

504 list_for_each_entry(dqp, &entry->duplicates, list) {

505 if (dqp->qpn == qpn) {

506 found = true;

507 break;

508 }

509 }

510 if (found) {

511 /* a duplicate, no need to change the mgm,

512 * only update the duplicates list */

513 list_del(&dqp->list);

514 kfree(dqp);

515 } else {

516 err = mlx4_READ_ENTRY(dev, entry->index, mailbox);

517 if (err)

518 goto out_mailbox;

519 members_count = be32_to_cpu(mgm->members_count) & 0xffffff;

520 for (loc = -1, i = 0; i < members_count; ++i)

521 if ((be32_to_cpu(mgm->qp[i]) & MGM_QPN_MASK) == qpn)

522 loc = i;

523

524 mgm->members_count = cpu_to_be32(--members_count |

525 (MLX4_PROT_ETH << 30));

526 mgm->qp[loc] = mgm->qp[i - 1];

527 mgm->qp[i - 1] = 0;

528

529 err = mlx4_WRITE_ENTRY(dev, entry->index, mailbox);

530 if (err)

531 goto out_mailbox;

532 }

533

534 }

535

536 out_mailbox:

537 mlx4_free_cmd_mailbox(dev, mailbox);

538 out_list:

539 if (back_to_list)

540 list_add_tail(&pqp->list, &s_steer->promisc_qps[steer]);

541 else

542 kfree(pqp);

543 out_mutex:

544 mutex_unlock(&priv->mcg_table.mutex);

545 return err;

546 }

547

548 /*

549 * Caller must hold MCG table semaphore. gid and mgm parameters must

550 * be properly aligned for command interface.

551 *

552 * Returns 0 unless a firmware command error occurs.

553 *

554 * If GID is found in MGM or MGM is empty, *index = *hash, *prev = -1

555 * and *mgm holds MGM entry.

556 *

557 * if GID is found in AMGM, *index = index in AMGM, *prev = index of

558 * previous entry in hash chain and *mgm holds AMGM entry.

559 *

560 * If no AMGM exists for given gid, *index = -1, *prev = index of last

561 * entry in hash chain and *mgm holds end of hash chain.

562 */

563 static int find_entry(struct mlx4_dev *dev, u8 port,

564 u8 *gid, enum mlx4_protocol prot,

565 struct mlx4_cmd_mailbox *mgm_mailbox,

566 int *prev, int *index)

567 {

568 struct mlx4_cmd_mailbox *mailbox;

569 struct mlx4_mgm *mgm = mgm_mailbox->buf;

570 u8 *mgid;

571 int err;

572 u16 hash;

573 u8 op_mod = (prot == MLX4_PROT_ETH) ?

574 !!(dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_MC_STEER) : 0;

575

576 mailbox = mlx4_alloc_cmd_mailbox(dev);

577 if (IS_ERR(mailbox))

578 return -ENOMEM;

579 mgid = mailbox->buf;

580

581 memcpy(mgid, gid, 16);

582

583 err = mlx4_GID_HASH(dev, mailbox, &hash, op_mod);

584 mlx4_free_cmd_mailbox(dev, mailbox);

585 if (err)

586 return err;

587

588 if (0)

589 mlx4_dbg(dev, "Hash for %pI6 is %04x\n", gid, hash);

590

591 *index = hash;

592 *prev = -1;

593

594 do {

595 err = mlx4_READ_ENTRY(dev, *index, mgm_mailbox);

596 if (err)

597 return err;

598

599 if (!(be32_to_cpu(mgm->members_count) & 0xffffff)) {

600 if (*index != hash) {

601 mlx4_err(dev, "Found zero MGID in AMGM.\n");

602 err = -EINVAL;

603 }

604 return err;

605 }

606

607 if (!memcmp(mgm->gid, gid, 16) &&

608 be32_to_cpu(mgm->members_count) >> 30 == prot)

609 return err;

610

611 *prev = *index;

612 *index = be32_to_cpu(mgm->next_gid_index) >> 6;

613 } while (*index);

614

615 *index = -1;

616 return err;

617 }

618

619 int mlx4_qp_attach_common(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16],

620 int block_mcast_loopback, enum mlx4_protocol prot,

621 enum mlx4_steer_type steer)

622 {

623 struct mlx4_priv *priv = mlx4_priv(dev);

624 struct mlx4_cmd_mailbox *mailbox;

625 struct mlx4_mgm *mgm;

626 u32 members_count;

627 int index, prev;

628 int link = 0;

629 int i;

630 int err;

631 u8 port = gid[5];

632 u8 new_entry = 0;

633

634 mailbox = mlx4_alloc_cmd_mailbox(dev);

635 if (IS_ERR(mailbox))

636 return PTR_ERR(mailbox);

637 mgm = mailbox->buf;

638

639 mutex_lock(&priv->mcg_table.mutex);

640 err = find_entry(dev, port, gid, prot,

641 mailbox, &prev, &index);

642 if (err)

643 goto out;

644

645 if (index != -1) {

646 if (!(be32_to_cpu(mgm->members_count) & 0xffffff)) {

647 new_entry = 1;

648 memcpy(mgm->gid, gid, 16);

649 }

650 } else {

651 link = 1;

652

653 index = mlx4_bitmap_alloc(&priv->mcg_table.bitmap);

654 if (index == -1) {

655 mlx4_err(dev, "No AMGM entries left\n");

656 err = -ENOMEM;

657 goto out;

658 }

659 index += dev->caps.num_mgms;

660

661 new_entry = 1;

662 memset(mgm, 0, sizeof *mgm);

663 memcpy(mgm->gid, gid, 16);

664 }

665

666 members_count = be32_to_cpu(mgm->members_count) & 0xffffff;

667 if (members_count == dev->caps.num_qp_per_mgm) {

668 mlx4_err(dev, "MGM at index %x is full.\n", index);

669 err = -ENOMEM;

670 goto out;

671 }

672

673 for (i = 0; i < members_count; ++i)

674 if ((be32_to_cpu(mgm->qp[i]) & MGM_QPN_MASK) == qp->qpn) {

675 mlx4_dbg(dev, "QP %06x already a member of MGM\n", qp->qpn);

676 err = 0;

677 goto out;

678 }

679

680 if (block_mcast_loopback)

681 mgm->qp[members_count++] = cpu_to_be32((qp->qpn & MGM_QPN_MASK) |

682 (1U << MGM_BLCK_LB_BIT));

683 else

684 mgm->qp[members_count++] = cpu_to_be32(qp->qpn & MGM_QPN_MASK);

685

686 mgm->members_count = cpu_to_be32(members_count | (u32) prot << 30);

687

688 err = mlx4_WRITE_ENTRY(dev, index, mailbox);

689 if (err)

690 goto out;

691

692 if (!link)

693 goto out;

694

695 err = mlx4_READ_ENTRY(dev, prev, mailbox);

696 if (err)

697 goto out;

698

699 mgm->next_gid_index = cpu_to_be32(index << 6);

700

701 err = mlx4_WRITE_ENTRY(dev, prev, mailbox);

702 if (err)

703 goto out;

704

705 out:

706 if (prot == MLX4_PROT_ETH) {

707 /* manage the steering entry for promisc mode */

708 if (new_entry)

709 new_steering_entry(dev, port, steer, index, qp->qpn);

710 else

711 existing_steering_entry(dev, port, steer,

712 index, qp->qpn);

713 }

714 if (err && link && index != -1) {

715 if (index < dev->caps.num_mgms)

716 mlx4_warn(dev, "Got AMGM index %d < %d",

717 index, dev->caps.num_mgms);

718 else

719 mlx4_bitmap_free(&priv->mcg_table.bitmap,

720 index - dev->caps.num_mgms);

721 }

722 mutex_unlock(&priv->mcg_table.mutex);

723

724 mlx4_free_cmd_mailbox(dev, mailbox);

725 return err;

726 }

727

728 int mlx4_qp_detach_common(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16],

729 enum mlx4_protocol prot, enum mlx4_steer_type steer)

730 {

731 struct mlx4_priv *priv = mlx4_priv(dev);

732 struct mlx4_cmd_mailbox *mailbox;

733 struct mlx4_mgm *mgm;

734 u32 members_count;

735 int prev, index;

736 int i, loc;

737 int err;

738 u8 port = gid[5];

739 bool removed_entry = false;

740

741 mailbox = mlx4_alloc_cmd_mailbox(dev);

742 if (IS_ERR(mailbox))

743 return PTR_ERR(mailbox);

744 mgm = mailbox->buf;

745

746 mutex_lock(&priv->mcg_table.mutex);

747

748 err = find_entry(dev, port, gid, prot,

749 mailbox, &prev, &index);

750 if (err)

751 goto out;

752

753 if (index == -1) {

754 mlx4_err(dev, "MGID %pI6 not found\n", gid);

755 err = -EINVAL;

756 goto out;

757 }

758

759 /* if this pq is also a promisc qp, it shouldn't be removed */

760 if (prot == MLX4_PROT_ETH &&

761 check_duplicate_entry(dev, port, steer, index, qp->qpn))

762 goto out;

763

764 members_count = be32_to_cpu(mgm->members_count) & 0xffffff;

765 for (loc = -1, i = 0; i < members_count; ++i)

766 if ((be32_to_cpu(mgm->qp[i]) & MGM_QPN_MASK) == qp->qpn)

767 loc = i;

768

769 if (loc == -1) {

770 mlx4_err(dev, "QP %06x not found in MGM\n", qp->qpn);

771 err = -EINVAL;

772 goto out;

773 }

774

775

776 mgm->members_count = cpu_to_be32(--members_count | (u32) prot << 30);

777 mgm->qp[loc] = mgm->qp[i - 1];

778 mgm->qp[i - 1] = 0;

779

780 if (prot == MLX4_PROT_ETH)

781 removed_entry = can_remove_steering_entry(dev, port, steer,

782 index, qp->qpn);

783 if (i != 1 && (prot != MLX4_PROT_ETH || !removed_entry)) {

784 err = mlx4_WRITE_ENTRY(dev, index, mailbox);

785 goto out;

786 }

787

788 /* We are going to delete the entry, members count should be 0 */

789 mgm->members_count = cpu_to_be32((u32) prot << 30);

790

791 if (prev == -1) {

792 /* Remove entry from MGM */

793 int amgm_index = be32_to_cpu(mgm->next_gid_index) >> 6;

794 if (amgm_index) {

795 err = mlx4_READ_ENTRY(dev, amgm_index, mailbox);

796 if (err)

797 goto out;

798 } else

799 memset(mgm->gid, 0, 16);

800

801 err = mlx4_WRITE_ENTRY(dev, index, mailbox);

802 if (err)

803 goto out;

804

805 if (amgm_index) {

806 if (amgm_index < dev->caps.num_mgms)

807 mlx4_warn(dev, "MGM entry %d had AMGM index %d < %d",

808 index, amgm_index, dev->caps.num_mgms);

809 else

810 mlx4_bitmap_free(&priv->mcg_table.bitmap,

811 amgm_index - dev->caps.num_mgms);

812 }

813 } else {

814 /* Remove entry from AMGM */

815 int cur_next_index = be32_to_cpu(mgm->next_gid_index) >> 6;

816 err = mlx4_READ_ENTRY(dev, prev, mailbox);

817 if (err)

818 goto out;

819

820 mgm->next_gid_index = cpu_to_be32(cur_next_index << 6);

821

822 err = mlx4_WRITE_ENTRY(dev, prev, mailbox);

823 if (err)

824 goto out;

825

826 if (index < dev->caps.num_mgms)

827 mlx4_warn(dev, "entry %d had next AMGM index %d < %d",

828 prev, index, dev->caps.num_mgms);

829 else

830 mlx4_bitmap_free(&priv->mcg_table.bitmap,

831 index - dev->caps.num_mgms);

832 }

833

834 out:

835 mutex_unlock(&priv->mcg_table.mutex);

836

837 mlx4_free_cmd_mailbox(dev, mailbox);

838 return err;

839 }

840

841 static int mlx4_QP_ATTACH(struct mlx4_dev *dev, struct mlx4_qp *qp,

842 u8 gid[16], u8 attach, u8 block_loopback,

843 enum mlx4_protocol prot)

844 {

845 struct mlx4_cmd_mailbox *mailbox;

846 int err = 0;

847 int qpn;

848

849 if (!mlx4_is_mfunc(dev))

850 return -EBADF;

851

852 mailbox = mlx4_alloc_cmd_mailbox(dev);

853 if (IS_ERR(mailbox))

854 return PTR_ERR(mailbox);

855

856 memcpy(mailbox->buf, gid, 16);

857 qpn = qp->qpn;

858 qpn |= (prot << 28);

859 if (attach && block_loopback)

860 qpn |= (1 << 31);

861

862 err = mlx4_cmd(dev, mailbox->dma, qpn, attach,

863 MLX4_CMD_QP_ATTACH, MLX4_CMD_TIME_CLASS_A,

864 MLX4_CMD_WRAPPED);

865

866 mlx4_free_cmd_mailbox(dev, mailbox);

867 return err;

868 }

869

870 int mlx4_multicast_attach(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16],

871 int block_mcast_loopback, enum mlx4_protocol prot)

872 {

873 enum mlx4_steer_type steer;

874

875 steer = (is_valid_ether_addr(&gid[10])) ? MLX4_UC_STEER : MLX4_MC_STEER;

876

877 if (prot == MLX4_PROT_ETH &&

878 !(dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_MC_STEER))

879 return 0;

880

881 if (prot == MLX4_PROT_ETH)

882 gid[7] |= (steer << 1);

883

884 if (mlx4_is_mfunc(dev))

885 return mlx4_QP_ATTACH(dev, qp, gid, 1,

886 block_mcast_loopback, prot);

887

888 return mlx4_qp_attach_common(dev, qp, gid, block_mcast_loopback,

889 prot, steer);

890 }

891 EXPORT_SYMBOL_GPL(mlx4_multicast_attach);

892

893 int mlx4_multicast_detach(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16],

894 enum mlx4_protocol prot)

895 {

896 enum mlx4_steer_type steer;

897

898 steer = (is_valid_ether_addr(&gid[10])) ? MLX4_UC_STEER : MLX4_MC_STEER;

899

900 if (prot == MLX4_PROT_ETH &&

901 !(dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_MC_STEER))

902 return 0;

903

904 if (prot == MLX4_PROT_ETH)

905 gid[7] |= (steer << 1);

906

907 if (mlx4_is_mfunc(dev))

908 return mlx4_QP_ATTACH(dev, qp, gid, 0, 0, prot);

909

910 return mlx4_qp_detach_common(dev, qp, gid, prot, steer);

911 }

912 EXPORT_SYMBOL_GPL(mlx4_multicast_detach);

913

914 int mlx4_unicast_attach(struct mlx4_dev *dev,

915 struct mlx4_qp *qp, u8 gid[16],

916 int block_mcast_loopback, enum mlx4_protocol prot)

917 {

918 if (prot == MLX4_PROT_ETH &&

919 !(dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_UC_STEER))

920 return 0;

921

922 if (prot == MLX4_PROT_ETH)

923 gid[7] |= (MLX4_UC_STEER << 1);

924

925 if (mlx4_is_mfunc(dev))

926 return mlx4_QP_ATTACH(dev, qp, gid, 1,

927 block_mcast_loopback, prot);

928

929 return mlx4_qp_attach_common(dev, qp, gid, block_mcast_loopback,

930 prot, MLX4_UC_STEER);

931 }

932 EXPORT_SYMBOL_GPL(mlx4_unicast_attach);

933

934 int mlx4_unicast_detach(struct mlx4_dev *dev, struct mlx4_qp *qp,

935 u8 gid[16], enum mlx4_protocol prot)

936 {

937 if (prot == MLX4_PROT_ETH &&

938 !(dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_UC_STEER))

939 return 0;

940

941 if (prot == MLX4_PROT_ETH)

942 gid[7] |= (MLX4_UC_STEER << 1);

943

944 if (mlx4_is_mfunc(dev))

945 return mlx4_QP_ATTACH(dev, qp, gid, 0, 0, prot);

946

947 return mlx4_qp_detach_common(dev, qp, gid, prot, MLX4_UC_STEER);

948 }

949 EXPORT_SYMBOL_GPL(mlx4_unicast_detach);

950

951 int mlx4_PROMISC_wrapper(struct mlx4_dev *dev, int slave,

952 struct mlx4_vhcr *vhcr,

953 struct mlx4_cmd_mailbox *inbox,

954 struct mlx4_cmd_mailbox *outbox,

955 struct mlx4_cmd_info *cmd)

956 {

957 u32 qpn = (u32) vhcr->in_param & 0xffffffff;

958 u8 port = vhcr->in_param >> 62;

959 enum mlx4_steer_type steer = vhcr->in_modifier;

960

961 /* Promiscuous unicast is not allowed in mfunc */

962 if (mlx4_is_mfunc(dev) && steer == MLX4_UC_STEER)

963 return 0;

964

965 if (vhcr->op_modifier)

966 return add_promisc_qp(dev, port, steer, qpn);

967 else

968 return remove_promisc_qp(dev, port, steer, qpn);

969 }

970

971 static int mlx4_PROMISC(struct mlx4_dev *dev, u32 qpn,

972 enum mlx4_steer_type steer, u8 add, u8 port)

973 {

974 return mlx4_cmd(dev, (u64) qpn | (u64) port << 62, (u32) steer, add,

975 MLX4_CMD_PROMISC, MLX4_CMD_TIME_CLASS_A,

976 MLX4_CMD_WRAPPED);

977 }

978

979 int mlx4_multicast_promisc_add(struct mlx4_dev *dev, u32 qpn, u8 port)

980 {

981 if (!(dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_MC_STEER))

982 return 0;

983

984 if (mlx4_is_mfunc(dev))

985 return mlx4_PROMISC(dev, qpn, MLX4_MC_STEER, 1, port);

986

987 return add_promisc_qp(dev, port, MLX4_MC_STEER, qpn);

988 }

989 EXPORT_SYMBOL_GPL(mlx4_multicast_promisc_add);

990

991 int mlx4_multicast_promisc_remove(struct mlx4_dev *dev, u32 qpn, u8 port)

992 {

993 if (!(dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_MC_STEER))

994 return 0;

995

996 if (mlx4_is_mfunc(dev))

997 return mlx4_PROMISC(dev, qpn, MLX4_MC_STEER, 0, port);

998

999 return remove_promisc_qp(dev, port, MLX4_MC_STEER, qpn);

1000 }

1001 EXPORT_SYMBOL_GPL(mlx4_multicast_promisc_remove);

1002

1003 int mlx4_unicast_promisc_add(struct mlx4_dev *dev, u32 qpn, u8 port)

1004 {

1005 if (!(dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_UC_STEER))

1006 return 0;

1007

1008 if (mlx4_is_mfunc(dev))

1009 return mlx4_PROMISC(dev, qpn, MLX4_UC_STEER, 1, port);

1010

1011 return add_promisc_qp(dev, port, MLX4_UC_STEER, qpn);

1012 }

1013 EXPORT_SYMBOL_GPL(mlx4_unicast_promisc_add);

1014

1015 int mlx4_unicast_promisc_remove(struct mlx4_dev *dev, u32 qpn, u8 port)

1016 {

1017 if (!(dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_UC_STEER))

1018 return 0;

1019

1020 if (mlx4_is_mfunc(dev))

1021 return mlx4_PROMISC(dev, qpn, MLX4_UC_STEER, 0, port);

1022

1023 return remove_promisc_qp(dev, port, MLX4_UC_STEER, qpn);

1024 }

1025 EXPORT_SYMBOL_GPL(mlx4_unicast_promisc_remove);

1026

1027 int mlx4_init_mcg_table(struct mlx4_dev *dev)

1028 {

1029 struct mlx4_priv *priv = mlx4_priv(dev);

1030 int err;

1031

1032 err = mlx4_bitmap_init(&priv->mcg_table.bitmap, dev->caps.num_amgms,

1033 dev->caps.num_amgms - 1, 0, 0);

1034 if (err)

1035 return err;

1036

1037 mutex_init(&priv->mcg_table.mutex);

1038

1039 return 0;

1040 }

1041

1042 void mlx4_cleanup_mcg_table(struct mlx4_dev *dev)

1043 {

1044 mlx4_bitmap_cleanup(&mlx4_priv(dev)->mcg_table.bitmap);

1045 }