2 * Copyright (c) 2004 Topspin Communications. All rights reserved.
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:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
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.
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
32 * $Id: mthca_mcg.c 1349 2004-12-16 21:09:43Z roland $
35 #include <linux/init.h>
37 #include "mthca_dev.h"
38 #include "mthca_cmd.h"
41 __be32 next_gid_index
;
44 __be32 qp
[MTHCA_QP_PER_MGM
];
47 static const u8 zero_gid
[16]; /* automatically initialized to 0 */
50 * Caller must hold MCG table semaphore. gid and mgm parameters must
51 * be properly aligned for command interface.
53 * Returns 0 unless a firmware command error occurs.
55 * If GID is found in MGM or MGM is empty, *index = *hash, *prev = -1
56 * and *mgm holds MGM entry.
58 * if GID is found in AMGM, *index = index in AMGM, *prev = index of
59 * previous entry in hash chain and *mgm holds AMGM entry.
61 * If no AMGM exists for given gid, *index = -1, *prev = index of last
62 * entry in hash chain and *mgm holds end of hash chain.
64 static int find_mgm(struct mthca_dev
*dev
,
65 u8
*gid
, struct mthca_mailbox
*mgm_mailbox
,
66 u16
*hash
, int *prev
, int *index
)
68 struct mthca_mailbox
*mailbox
;
69 struct mthca_mgm
*mgm
= mgm_mailbox
->buf
;
74 mailbox
= mthca_alloc_mailbox(dev
, GFP_KERNEL
);
79 memcpy(mgid
, gid
, 16);
81 err
= mthca_MGID_HASH(dev
, mailbox
, hash
, &status
);
85 mthca_err(dev
, "MGID_HASH returned status %02x\n", status
);
91 mthca_dbg(dev
, "Hash for %04x:%04x:%04x:%04x:"
92 "%04x:%04x:%04x:%04x is %04x\n",
93 be16_to_cpu(((__be16
*) gid
)[0]),
94 be16_to_cpu(((__be16
*) gid
)[1]),
95 be16_to_cpu(((__be16
*) gid
)[2]),
96 be16_to_cpu(((__be16
*) gid
)[3]),
97 be16_to_cpu(((__be16
*) gid
)[4]),
98 be16_to_cpu(((__be16
*) gid
)[5]),
99 be16_to_cpu(((__be16
*) gid
)[6]),
100 be16_to_cpu(((__be16
*) gid
)[7]),
107 err
= mthca_READ_MGM(dev
, *index
, mgm_mailbox
, &status
);
111 mthca_err(dev
, "READ_MGM returned status %02x\n", status
);
115 if (!memcmp(mgm
->gid
, zero_gid
, 16)) {
116 if (*index
!= *hash
) {
117 mthca_err(dev
, "Found zero MGID in AMGM.\n");
123 if (!memcmp(mgm
->gid
, gid
, 16))
127 *index
= be32_to_cpu(mgm
->next_gid_index
) >> 5;
133 mthca_free_mailbox(dev
, mailbox
);
137 int mthca_multicast_attach(struct ib_qp
*ibqp
, union ib_gid
*gid
, u16 lid
)
139 struct mthca_dev
*dev
= to_mdev(ibqp
->device
);
140 struct mthca_mailbox
*mailbox
;
141 struct mthca_mgm
*mgm
;
149 mailbox
= mthca_alloc_mailbox(dev
, GFP_KERNEL
);
151 return PTR_ERR(mailbox
);
154 if (down_interruptible(&dev
->mcg_table
.sem
))
157 err
= find_mgm(dev
, gid
->raw
, mailbox
, &hash
, &prev
, &index
);
162 if (!memcmp(mgm
->gid
, zero_gid
, 16))
163 memcpy(mgm
->gid
, gid
->raw
, 16);
167 index
= mthca_alloc(&dev
->mcg_table
.alloc
);
169 mthca_err(dev
, "No AMGM entries left\n");
174 err
= mthca_READ_MGM(dev
, index
, mailbox
, &status
);
178 mthca_err(dev
, "READ_MGM returned status %02x\n", status
);
183 memcpy(mgm
->gid
, gid
->raw
, 16);
184 mgm
->next_gid_index
= 0;
187 for (i
= 0; i
< MTHCA_QP_PER_MGM
; ++i
)
188 if (mgm
->qp
[i
] == cpu_to_be32(ibqp
->qp_num
| (1 << 31))) {
189 mthca_dbg(dev
, "QP %06x already a member of MGM\n",
193 } else if (!(mgm
->qp
[i
] & cpu_to_be32(1 << 31))) {
194 mgm
->qp
[i
] = cpu_to_be32(ibqp
->qp_num
| (1 << 31));
198 if (i
== MTHCA_QP_PER_MGM
) {
199 mthca_err(dev
, "MGM at index %x is full.\n", index
);
204 err
= mthca_WRITE_MGM(dev
, index
, mailbox
, &status
);
208 mthca_err(dev
, "WRITE_MGM returned status %02x\n", status
);
215 err
= mthca_READ_MGM(dev
, prev
, mailbox
, &status
);
219 mthca_err(dev
, "READ_MGM returned status %02x\n", status
);
224 mgm
->next_gid_index
= cpu_to_be32(index
<< 5);
226 err
= mthca_WRITE_MGM(dev
, prev
, mailbox
, &status
);
230 mthca_err(dev
, "WRITE_MGM returned status %02x\n", status
);
235 up(&dev
->mcg_table
.sem
);
236 mthca_free_mailbox(dev
, mailbox
);
240 int mthca_multicast_detach(struct ib_qp
*ibqp
, union ib_gid
*gid
, u16 lid
)
242 struct mthca_dev
*dev
= to_mdev(ibqp
->device
);
243 struct mthca_mailbox
*mailbox
;
244 struct mthca_mgm
*mgm
;
251 mailbox
= mthca_alloc_mailbox(dev
, GFP_KERNEL
);
253 return PTR_ERR(mailbox
);
256 if (down_interruptible(&dev
->mcg_table
.sem
))
259 err
= find_mgm(dev
, gid
->raw
, mailbox
, &hash
, &prev
, &index
);
264 mthca_err(dev
, "MGID %04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x "
266 be16_to_cpu(((__be16
*) gid
->raw
)[0]),
267 be16_to_cpu(((__be16
*) gid
->raw
)[1]),
268 be16_to_cpu(((__be16
*) gid
->raw
)[2]),
269 be16_to_cpu(((__be16
*) gid
->raw
)[3]),
270 be16_to_cpu(((__be16
*) gid
->raw
)[4]),
271 be16_to_cpu(((__be16
*) gid
->raw
)[5]),
272 be16_to_cpu(((__be16
*) gid
->raw
)[6]),
273 be16_to_cpu(((__be16
*) gid
->raw
)[7]));
278 for (loc
= -1, i
= 0; i
< MTHCA_QP_PER_MGM
; ++i
) {
279 if (mgm
->qp
[i
] == cpu_to_be32(ibqp
->qp_num
| (1 << 31)))
281 if (!(mgm
->qp
[i
] & cpu_to_be32(1 << 31)))
286 mthca_err(dev
, "QP %06x not found in MGM\n", ibqp
->qp_num
);
291 mgm
->qp
[loc
] = mgm
->qp
[i
- 1];
294 err
= mthca_WRITE_MGM(dev
, index
, mailbox
, &status
);
298 mthca_err(dev
, "WRITE_MGM returned status %02x\n", status
);
309 /* Remove entry from MGM */
310 if (be32_to_cpu(mgm
->next_gid_index
) >> 5) {
311 err
= mthca_READ_MGM(dev
,
312 be32_to_cpu(mgm
->next_gid_index
) >> 5,
317 mthca_err(dev
, "READ_MGM returned status %02x\n",
323 memset(mgm
->gid
, 0, 16);
325 err
= mthca_WRITE_MGM(dev
, index
, mailbox
, &status
);
329 mthca_err(dev
, "WRITE_MGM returned status %02x\n", status
);
334 /* Remove entry from AMGM */
335 index
= be32_to_cpu(mgm
->next_gid_index
) >> 5;
336 err
= mthca_READ_MGM(dev
, prev
, mailbox
, &status
);
340 mthca_err(dev
, "READ_MGM returned status %02x\n", status
);
345 mgm
->next_gid_index
= cpu_to_be32(index
<< 5);
347 err
= mthca_WRITE_MGM(dev
, prev
, mailbox
, &status
);
351 mthca_err(dev
, "WRITE_MGM returned status %02x\n", status
);
358 up(&dev
->mcg_table
.sem
);
359 mthca_free_mailbox(dev
, mailbox
);
363 int __devinit
mthca_init_mcg_table(struct mthca_dev
*dev
)
367 err
= mthca_alloc_init(&dev
->mcg_table
.alloc
,
368 dev
->limits
.num_amgms
,
369 dev
->limits
.num_amgms
- 1,
374 init_MUTEX(&dev
->mcg_table
.sem
);
379 void __devexit
mthca_cleanup_mcg_table(struct mthca_dev
*dev
)
381 mthca_alloc_cleanup(&dev
->mcg_table
.alloc
);
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