Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
| 36 | |
| 37 | #include "mthca_dev.h" |
| 38 | #include "mthca_cmd.h" |
| 39 | |
| 40 | enum { |
| 41 | MTHCA_QP_PER_MGM = 4 * (MTHCA_MGM_ENTRY_SIZE / 16 - 2) |
| 42 | }; |
| 43 | |
| 44 | struct mthca_mgm { |
| 45 | u32 next_gid_index; |
| 46 | u32 reserved[3]; |
| 47 | u8 gid[16]; |
| 48 | u32 qp[MTHCA_QP_PER_MGM]; |
| 49 | }; |
| 50 | |
| 51 | static const u8 zero_gid[16]; /* automatically initialized to 0 */ |
| 52 | |
| 53 | /* |
| 54 | * Caller must hold MCG table semaphore. gid and mgm parameters must |
| 55 | * be properly aligned for command interface. |
| 56 | * |
| 57 | * Returns 0 unless a firmware command error occurs. |
| 58 | * |
| 59 | * If GID is found in MGM or MGM is empty, *index = *hash, *prev = -1 |
| 60 | * and *mgm holds MGM entry. |
| 61 | * |
| 62 | * if GID is found in AMGM, *index = index in AMGM, *prev = index of |
| 63 | * previous entry in hash chain and *mgm holds AMGM entry. |
| 64 | * |
| 65 | * If no AMGM exists for given gid, *index = -1, *prev = index of last |
| 66 | * entry in hash chain and *mgm holds end of hash chain. |
| 67 | */ |
| 68 | static int find_mgm(struct mthca_dev *dev, |
Roland Dreier | ed87845 | 2005-06-27 14:36:45 -0700 | [diff] [blame] | 69 | u8 *gid, struct mthca_mailbox *mgm_mailbox, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | u16 *hash, int *prev, int *index) |
| 71 | { |
Roland Dreier | ed87845 | 2005-06-27 14:36:45 -0700 | [diff] [blame] | 72 | struct mthca_mailbox *mailbox; |
| 73 | struct mthca_mgm *mgm = mgm_mailbox->buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | u8 *mgid; |
| 75 | int err; |
| 76 | u8 status; |
| 77 | |
Roland Dreier | ed87845 | 2005-06-27 14:36:45 -0700 | [diff] [blame] | 78 | mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); |
| 79 | if (IS_ERR(mailbox)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | return -ENOMEM; |
Roland Dreier | ed87845 | 2005-06-27 14:36:45 -0700 | [diff] [blame] | 81 | mgid = mailbox->buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | |
| 83 | memcpy(mgid, gid, 16); |
| 84 | |
Roland Dreier | ed87845 | 2005-06-27 14:36:45 -0700 | [diff] [blame] | 85 | err = mthca_MGID_HASH(dev, mailbox, hash, &status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | if (err) |
| 87 | goto out; |
| 88 | if (status) { |
| 89 | mthca_err(dev, "MGID_HASH returned status %02x\n", status); |
| 90 | err = -EINVAL; |
| 91 | goto out; |
| 92 | } |
| 93 | |
| 94 | if (0) |
| 95 | mthca_dbg(dev, "Hash for %04x:%04x:%04x:%04x:" |
| 96 | "%04x:%04x:%04x:%04x is %04x\n", |
| 97 | be16_to_cpu(((u16 *) gid)[0]), be16_to_cpu(((u16 *) gid)[1]), |
| 98 | be16_to_cpu(((u16 *) gid)[2]), be16_to_cpu(((u16 *) gid)[3]), |
| 99 | be16_to_cpu(((u16 *) gid)[4]), be16_to_cpu(((u16 *) gid)[5]), |
| 100 | be16_to_cpu(((u16 *) gid)[6]), be16_to_cpu(((u16 *) gid)[7]), |
| 101 | *hash); |
| 102 | |
| 103 | *index = *hash; |
| 104 | *prev = -1; |
| 105 | |
| 106 | do { |
Roland Dreier | ed87845 | 2005-06-27 14:36:45 -0700 | [diff] [blame] | 107 | err = mthca_READ_MGM(dev, *index, mgm_mailbox, &status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | if (err) |
| 109 | goto out; |
| 110 | if (status) { |
| 111 | mthca_err(dev, "READ_MGM returned status %02x\n", status); |
| 112 | return -EINVAL; |
| 113 | } |
| 114 | |
| 115 | if (!memcmp(mgm->gid, zero_gid, 16)) { |
| 116 | if (*index != *hash) { |
| 117 | mthca_err(dev, "Found zero MGID in AMGM.\n"); |
| 118 | err = -EINVAL; |
| 119 | } |
| 120 | goto out; |
| 121 | } |
| 122 | |
| 123 | if (!memcmp(mgm->gid, gid, 16)) |
| 124 | goto out; |
| 125 | |
| 126 | *prev = *index; |
| 127 | *index = be32_to_cpu(mgm->next_gid_index) >> 5; |
| 128 | } while (*index); |
| 129 | |
| 130 | *index = -1; |
| 131 | |
| 132 | out: |
Roland Dreier | ed87845 | 2005-06-27 14:36:45 -0700 | [diff] [blame] | 133 | mthca_free_mailbox(dev, mailbox); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | return err; |
| 135 | } |
| 136 | |
| 137 | int mthca_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid) |
| 138 | { |
| 139 | struct mthca_dev *dev = to_mdev(ibqp->device); |
Roland Dreier | ed87845 | 2005-06-27 14:36:45 -0700 | [diff] [blame] | 140 | struct mthca_mailbox *mailbox; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | struct mthca_mgm *mgm; |
| 142 | u16 hash; |
| 143 | int index, prev; |
| 144 | int link = 0; |
| 145 | int i; |
| 146 | int err; |
| 147 | u8 status; |
| 148 | |
Roland Dreier | ed87845 | 2005-06-27 14:36:45 -0700 | [diff] [blame] | 149 | mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); |
| 150 | if (IS_ERR(mailbox)) |
| 151 | return PTR_ERR(mailbox); |
| 152 | mgm = mailbox->buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | |
| 154 | if (down_interruptible(&dev->mcg_table.sem)) |
| 155 | return -EINTR; |
| 156 | |
Roland Dreier | ed87845 | 2005-06-27 14:36:45 -0700 | [diff] [blame] | 157 | err = find_mgm(dev, gid->raw, mailbox, &hash, &prev, &index); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | if (err) |
| 159 | goto out; |
| 160 | |
| 161 | if (index != -1) { |
| 162 | if (!memcmp(mgm->gid, zero_gid, 16)) |
| 163 | memcpy(mgm->gid, gid->raw, 16); |
| 164 | } else { |
| 165 | link = 1; |
| 166 | |
| 167 | index = mthca_alloc(&dev->mcg_table.alloc); |
| 168 | if (index == -1) { |
| 169 | mthca_err(dev, "No AMGM entries left\n"); |
| 170 | err = -ENOMEM; |
| 171 | goto out; |
| 172 | } |
| 173 | |
Roland Dreier | ed87845 | 2005-06-27 14:36:45 -0700 | [diff] [blame] | 174 | err = mthca_READ_MGM(dev, index, mailbox, &status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | if (err) |
| 176 | goto out; |
| 177 | if (status) { |
| 178 | mthca_err(dev, "READ_MGM returned status %02x\n", status); |
| 179 | err = -EINVAL; |
| 180 | goto out; |
| 181 | } |
| 182 | |
| 183 | memcpy(mgm->gid, gid->raw, 16); |
| 184 | mgm->next_gid_index = 0; |
| 185 | } |
| 186 | |
| 187 | for (i = 0; i < MTHCA_QP_PER_MGM; ++i) |
| 188 | if (!(mgm->qp[i] & cpu_to_be32(1 << 31))) { |
| 189 | mgm->qp[i] = cpu_to_be32(ibqp->qp_num | (1 << 31)); |
| 190 | break; |
| 191 | } |
| 192 | |
| 193 | if (i == MTHCA_QP_PER_MGM) { |
| 194 | mthca_err(dev, "MGM at index %x is full.\n", index); |
| 195 | err = -ENOMEM; |
| 196 | goto out; |
| 197 | } |
| 198 | |
Roland Dreier | ed87845 | 2005-06-27 14:36:45 -0700 | [diff] [blame] | 199 | err = mthca_WRITE_MGM(dev, index, mailbox, &status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | if (err) |
| 201 | goto out; |
| 202 | if (status) { |
| 203 | mthca_err(dev, "WRITE_MGM returned status %02x\n", status); |
| 204 | err = -EINVAL; |
| 205 | } |
| 206 | |
| 207 | if (!link) |
| 208 | goto out; |
| 209 | |
Roland Dreier | ed87845 | 2005-06-27 14:36:45 -0700 | [diff] [blame] | 210 | err = mthca_READ_MGM(dev, prev, mailbox, &status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | if (err) |
| 212 | goto out; |
| 213 | if (status) { |
| 214 | mthca_err(dev, "READ_MGM returned status %02x\n", status); |
| 215 | err = -EINVAL; |
| 216 | goto out; |
| 217 | } |
| 218 | |
| 219 | mgm->next_gid_index = cpu_to_be32(index << 5); |
| 220 | |
Roland Dreier | ed87845 | 2005-06-27 14:36:45 -0700 | [diff] [blame] | 221 | err = mthca_WRITE_MGM(dev, prev, mailbox, &status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | if (err) |
| 223 | goto out; |
| 224 | if (status) { |
| 225 | mthca_err(dev, "WRITE_MGM returned status %02x\n", status); |
| 226 | err = -EINVAL; |
| 227 | } |
| 228 | |
| 229 | out: |
| 230 | up(&dev->mcg_table.sem); |
Roland Dreier | ed87845 | 2005-06-27 14:36:45 -0700 | [diff] [blame] | 231 | mthca_free_mailbox(dev, mailbox); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | return err; |
| 233 | } |
| 234 | |
| 235 | int mthca_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid) |
| 236 | { |
| 237 | struct mthca_dev *dev = to_mdev(ibqp->device); |
Roland Dreier | ed87845 | 2005-06-27 14:36:45 -0700 | [diff] [blame] | 238 | struct mthca_mailbox *mailbox; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | struct mthca_mgm *mgm; |
| 240 | u16 hash; |
| 241 | int prev, index; |
| 242 | int i, loc; |
| 243 | int err; |
| 244 | u8 status; |
| 245 | |
Roland Dreier | ed87845 | 2005-06-27 14:36:45 -0700 | [diff] [blame] | 246 | mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); |
| 247 | if (IS_ERR(mailbox)) |
| 248 | return PTR_ERR(mailbox); |
| 249 | mgm = mailbox->buf; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | |
| 251 | if (down_interruptible(&dev->mcg_table.sem)) |
| 252 | return -EINTR; |
| 253 | |
Roland Dreier | ed87845 | 2005-06-27 14:36:45 -0700 | [diff] [blame] | 254 | err = find_mgm(dev, gid->raw, mailbox, &hash, &prev, &index); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | if (err) |
| 256 | goto out; |
| 257 | |
| 258 | if (index == -1) { |
| 259 | mthca_err(dev, "MGID %04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x " |
| 260 | "not found\n", |
| 261 | be16_to_cpu(((u16 *) gid->raw)[0]), |
| 262 | be16_to_cpu(((u16 *) gid->raw)[1]), |
| 263 | be16_to_cpu(((u16 *) gid->raw)[2]), |
| 264 | be16_to_cpu(((u16 *) gid->raw)[3]), |
| 265 | be16_to_cpu(((u16 *) gid->raw)[4]), |
| 266 | be16_to_cpu(((u16 *) gid->raw)[5]), |
| 267 | be16_to_cpu(((u16 *) gid->raw)[6]), |
| 268 | be16_to_cpu(((u16 *) gid->raw)[7])); |
| 269 | err = -EINVAL; |
| 270 | goto out; |
| 271 | } |
| 272 | |
| 273 | for (loc = -1, i = 0; i < MTHCA_QP_PER_MGM; ++i) { |
| 274 | if (mgm->qp[i] == cpu_to_be32(ibqp->qp_num | (1 << 31))) |
| 275 | loc = i; |
| 276 | if (!(mgm->qp[i] & cpu_to_be32(1 << 31))) |
| 277 | break; |
| 278 | } |
| 279 | |
| 280 | if (loc == -1) { |
| 281 | mthca_err(dev, "QP %06x not found in MGM\n", ibqp->qp_num); |
| 282 | err = -EINVAL; |
| 283 | goto out; |
| 284 | } |
| 285 | |
| 286 | mgm->qp[loc] = mgm->qp[i - 1]; |
| 287 | mgm->qp[i - 1] = 0; |
| 288 | |
Roland Dreier | ed87845 | 2005-06-27 14:36:45 -0700 | [diff] [blame] | 289 | err = mthca_WRITE_MGM(dev, index, mailbox, &status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 290 | if (err) |
| 291 | goto out; |
| 292 | if (status) { |
| 293 | mthca_err(dev, "WRITE_MGM returned status %02x\n", status); |
| 294 | err = -EINVAL; |
| 295 | goto out; |
| 296 | } |
| 297 | |
| 298 | if (i != 1) |
| 299 | goto out; |
| 300 | |
| 301 | goto out; |
| 302 | |
| 303 | if (prev == -1) { |
| 304 | /* Remove entry from MGM */ |
| 305 | if (be32_to_cpu(mgm->next_gid_index) >> 5) { |
| 306 | err = mthca_READ_MGM(dev, |
| 307 | be32_to_cpu(mgm->next_gid_index) >> 5, |
Roland Dreier | ed87845 | 2005-06-27 14:36:45 -0700 | [diff] [blame] | 308 | mailbox, &status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | if (err) |
| 310 | goto out; |
| 311 | if (status) { |
| 312 | mthca_err(dev, "READ_MGM returned status %02x\n", |
| 313 | status); |
| 314 | err = -EINVAL; |
| 315 | goto out; |
| 316 | } |
| 317 | } else |
| 318 | memset(mgm->gid, 0, 16); |
| 319 | |
Roland Dreier | ed87845 | 2005-06-27 14:36:45 -0700 | [diff] [blame] | 320 | err = mthca_WRITE_MGM(dev, index, mailbox, &status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | if (err) |
| 322 | goto out; |
| 323 | if (status) { |
| 324 | mthca_err(dev, "WRITE_MGM returned status %02x\n", status); |
| 325 | err = -EINVAL; |
| 326 | goto out; |
| 327 | } |
| 328 | } else { |
| 329 | /* Remove entry from AMGM */ |
| 330 | index = be32_to_cpu(mgm->next_gid_index) >> 5; |
Roland Dreier | ed87845 | 2005-06-27 14:36:45 -0700 | [diff] [blame] | 331 | err = mthca_READ_MGM(dev, prev, mailbox, &status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | if (err) |
| 333 | goto out; |
| 334 | if (status) { |
| 335 | mthca_err(dev, "READ_MGM returned status %02x\n", status); |
| 336 | err = -EINVAL; |
| 337 | goto out; |
| 338 | } |
| 339 | |
| 340 | mgm->next_gid_index = cpu_to_be32(index << 5); |
| 341 | |
Roland Dreier | ed87845 | 2005-06-27 14:36:45 -0700 | [diff] [blame] | 342 | err = mthca_WRITE_MGM(dev, prev, mailbox, &status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | if (err) |
| 344 | goto out; |
| 345 | if (status) { |
| 346 | mthca_err(dev, "WRITE_MGM returned status %02x\n", status); |
| 347 | err = -EINVAL; |
| 348 | goto out; |
| 349 | } |
| 350 | } |
| 351 | |
| 352 | out: |
| 353 | up(&dev->mcg_table.sem); |
Roland Dreier | ed87845 | 2005-06-27 14:36:45 -0700 | [diff] [blame] | 354 | mthca_free_mailbox(dev, mailbox); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | return err; |
| 356 | } |
| 357 | |
| 358 | int __devinit mthca_init_mcg_table(struct mthca_dev *dev) |
| 359 | { |
| 360 | int err; |
| 361 | |
| 362 | err = mthca_alloc_init(&dev->mcg_table.alloc, |
| 363 | dev->limits.num_amgms, |
| 364 | dev->limits.num_amgms - 1, |
| 365 | 0); |
| 366 | if (err) |
| 367 | return err; |
| 368 | |
| 369 | init_MUTEX(&dev->mcg_table.sem); |
| 370 | |
| 371 | return 0; |
| 372 | } |
| 373 | |
| 374 | void __devexit mthca_cleanup_mcg_table(struct mthca_dev *dev) |
| 375 | { |
| 376 | mthca_alloc_cleanup(&dev->mcg_table.alloc); |
| 377 | } |