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 MTHCA_QP_PER_MGM
= 4 * (MTHCA_MGM_ENTRY_SIZE
/ 16 - 2)
45 __be32 next_gid_index
;
48 __be32 qp
[MTHCA_QP_PER_MGM
];
51 static const u8 zero_gid
[16]; /* automatically initialized to 0 */
54 * Caller must hold MCG table semaphore. gid and mgm parameters must
55 * be properly aligned for command interface.
57 * Returns 0 unless a firmware command error occurs.
59 * If GID is found in MGM or MGM is empty, *index = *hash, *prev = -1
60 * and *mgm holds MGM entry.
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.
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.
68 static int find_mgm(struct mthca_dev
*dev
,
69 u8
*gid
, struct mthca_mailbox
*mgm_mailbox
,
70 u16
*hash
, int *prev
, int *index
)
72 struct mthca_mailbox
*mailbox
;
73 struct mthca_mgm
*mgm
= mgm_mailbox
->buf
;
78 mailbox
= mthca_alloc_mailbox(dev
, GFP_KERNEL
);
83 memcpy(mgid
, gid
, 16);
85 err
= mthca_MGID_HASH(dev
, mailbox
, hash
, &status
);
89 mthca_err(dev
, "MGID_HASH returned status %02x\n", status
);
95 mthca_dbg(dev
, "Hash for %04x:%04x:%04x:%04x:"
96 "%04x:%04x:%04x:%04x is %04x\n",
97 be16_to_cpu(((__be16
*) gid
)[0]),
98 be16_to_cpu(((__be16
*) gid
)[1]),
99 be16_to_cpu(((__be16
*) gid
)[2]),
100 be16_to_cpu(((__be16
*) gid
)[3]),
101 be16_to_cpu(((__be16
*) gid
)[4]),
102 be16_to_cpu(((__be16
*) gid
)[5]),
103 be16_to_cpu(((__be16
*) gid
)[6]),
104 be16_to_cpu(((__be16
*) gid
)[7]),
111 err
= mthca_READ_MGM(dev
, *index
, mgm_mailbox
, &status
);
115 mthca_err(dev
, "READ_MGM returned status %02x\n", status
);
119 if (!memcmp(mgm
->gid
, zero_gid
, 16)) {
120 if (*index
!= *hash
) {
121 mthca_err(dev
, "Found zero MGID in AMGM.\n");
127 if (!memcmp(mgm
->gid
, gid
, 16))
131 *index
= be32_to_cpu(mgm
->next_gid_index
) >> 5;
137 mthca_free_mailbox(dev
, mailbox
);
141 int mthca_multicast_attach(struct ib_qp
*ibqp
, union ib_gid
*gid
, u16 lid
)
143 struct mthca_dev
*dev
= to_mdev(ibqp
->device
);
144 struct mthca_mailbox
*mailbox
;
145 struct mthca_mgm
*mgm
;
153 mailbox
= mthca_alloc_mailbox(dev
, GFP_KERNEL
);
155 return PTR_ERR(mailbox
);
158 if (down_interruptible(&dev
->mcg_table
.sem
))
161 err
= find_mgm(dev
, gid
->raw
, mailbox
, &hash
, &prev
, &index
);
166 if (!memcmp(mgm
->gid
, zero_gid
, 16))
167 memcpy(mgm
->gid
, gid
->raw
, 16);
171 index
= mthca_alloc(&dev
->mcg_table
.alloc
);
173 mthca_err(dev
, "No AMGM entries left\n");
178 err
= mthca_READ_MGM(dev
, index
, mailbox
, &status
);
182 mthca_err(dev
, "READ_MGM returned status %02x\n", status
);
187 memcpy(mgm
->gid
, gid
->raw
, 16);
188 mgm
->next_gid_index
= 0;
191 for (i
= 0; i
< MTHCA_QP_PER_MGM
; ++i
)
192 if (!(mgm
->qp
[i
] & cpu_to_be32(1 << 31))) {
193 mgm
->qp
[i
] = cpu_to_be32(ibqp
->qp_num
| (1 << 31));
197 if (i
== MTHCA_QP_PER_MGM
) {
198 mthca_err(dev
, "MGM at index %x is full.\n", index
);
203 err
= mthca_WRITE_MGM(dev
, index
, mailbox
, &status
);
207 mthca_err(dev
, "WRITE_MGM returned status %02x\n", status
);
214 err
= mthca_READ_MGM(dev
, prev
, mailbox
, &status
);
218 mthca_err(dev
, "READ_MGM returned status %02x\n", status
);
223 mgm
->next_gid_index
= cpu_to_be32(index
<< 5);
225 err
= mthca_WRITE_MGM(dev
, prev
, mailbox
, &status
);
229 mthca_err(dev
, "WRITE_MGM returned status %02x\n", status
);
234 up(&dev
->mcg_table
.sem
);
235 mthca_free_mailbox(dev
, mailbox
);
239 int mthca_multicast_detach(struct ib_qp
*ibqp
, union ib_gid
*gid
, u16 lid
)
241 struct mthca_dev
*dev
= to_mdev(ibqp
->device
);
242 struct mthca_mailbox
*mailbox
;
243 struct mthca_mgm
*mgm
;
250 mailbox
= mthca_alloc_mailbox(dev
, GFP_KERNEL
);
252 return PTR_ERR(mailbox
);
255 if (down_interruptible(&dev
->mcg_table
.sem
))
258 err
= find_mgm(dev
, gid
->raw
, mailbox
, &hash
, &prev
, &index
);
263 mthca_err(dev
, "MGID %04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x "
265 be16_to_cpu(((__be16
*) gid
->raw
)[0]),
266 be16_to_cpu(((__be16
*) gid
->raw
)[1]),
267 be16_to_cpu(((__be16
*) gid
->raw
)[2]),
268 be16_to_cpu(((__be16
*) gid
->raw
)[3]),
269 be16_to_cpu(((__be16
*) gid
->raw
)[4]),
270 be16_to_cpu(((__be16
*) gid
->raw
)[5]),
271 be16_to_cpu(((__be16
*) gid
->raw
)[6]),
272 be16_to_cpu(((__be16
*) gid
->raw
)[7]));
277 for (loc
= -1, i
= 0; i
< MTHCA_QP_PER_MGM
; ++i
) {
278 if (mgm
->qp
[i
] == cpu_to_be32(ibqp
->qp_num
| (1 << 31)))
280 if (!(mgm
->qp
[i
] & cpu_to_be32(1 << 31)))
285 mthca_err(dev
, "QP %06x not found in MGM\n", ibqp
->qp_num
);
290 mgm
->qp
[loc
] = mgm
->qp
[i
- 1];
293 err
= mthca_WRITE_MGM(dev
, index
, mailbox
, &status
);
297 mthca_err(dev
, "WRITE_MGM returned status %02x\n", status
);
308 /* Remove entry from MGM */
309 if (be32_to_cpu(mgm
->next_gid_index
) >> 5) {
310 err
= mthca_READ_MGM(dev
,
311 be32_to_cpu(mgm
->next_gid_index
) >> 5,
316 mthca_err(dev
, "READ_MGM returned status %02x\n",
322 memset(mgm
->gid
, 0, 16);
324 err
= mthca_WRITE_MGM(dev
, index
, mailbox
, &status
);
328 mthca_err(dev
, "WRITE_MGM returned status %02x\n", status
);
333 /* Remove entry from AMGM */
334 index
= be32_to_cpu(mgm
->next_gid_index
) >> 5;
335 err
= mthca_READ_MGM(dev
, prev
, mailbox
, &status
);
339 mthca_err(dev
, "READ_MGM returned status %02x\n", status
);
344 mgm
->next_gid_index
= cpu_to_be32(index
<< 5);
346 err
= mthca_WRITE_MGM(dev
, prev
, mailbox
, &status
);
350 mthca_err(dev
, "WRITE_MGM returned status %02x\n", status
);
357 up(&dev
->mcg_table
.sem
);
358 mthca_free_mailbox(dev
, mailbox
);
362 int __devinit
mthca_init_mcg_table(struct mthca_dev
*dev
)
366 err
= mthca_alloc_init(&dev
->mcg_table
.alloc
,
367 dev
->limits
.num_amgms
,
368 dev
->limits
.num_amgms
- 1,
373 init_MUTEX(&dev
->mcg_table
.sem
);
378 void __devexit
mthca_cleanup_mcg_table(struct mthca_dev
*dev
)
380 mthca_alloc_cleanup(&dev
->mcg_table
.alloc
);
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