395 lines
9.5 KiB
C
395 lines
9.5 KiB
C
/*
|
|
* Copyright (c) 2004 Topspin Communications. All rights reserved.
|
|
*
|
|
* This software is available to you under a choice of one of two
|
|
* licenses. You may choose to be licensed under the terms of the GNU
|
|
* General Public License (GPL) Version 2, available from the file
|
|
* COPYING in the main directory of this source tree, or the
|
|
* OpenIB.org BSD license below:
|
|
*
|
|
* Redistribution and use in source and binary forms, with or
|
|
* without modification, are permitted provided that the following
|
|
* conditions are met:
|
|
*
|
|
* - Redistributions of source code must retain the above
|
|
* copyright notice, this list of conditions and the following
|
|
* disclaimer.
|
|
*
|
|
* - Redistributions in binary form must reproduce the above
|
|
* copyright notice, this list of conditions and the following
|
|
* disclaimer in the documentation and/or other materials
|
|
* provided with the distribution.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
|
|
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
|
|
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
|
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
* SOFTWARE.
|
|
*
|
|
* $Id: mthca_mcg.c 1349 2004-12-16 21:09:43Z roland $
|
|
*/
|
|
|
|
#include <linux/init.h>
|
|
#include <linux/string.h>
|
|
#include <linux/slab.h>
|
|
|
|
#include "mthca_dev.h"
|
|
#include "mthca_cmd.h"
|
|
|
|
struct mthca_mgm {
|
|
__be32 next_gid_index;
|
|
u32 reserved[3];
|
|
u8 gid[16];
|
|
__be32 qp[MTHCA_QP_PER_MGM];
|
|
};
|
|
|
|
static const u8 zero_gid[16]; /* automatically initialized to 0 */
|
|
|
|
/*
|
|
* Caller must hold MCG table semaphore. gid and mgm parameters must
|
|
* be properly aligned for command interface.
|
|
*
|
|
* Returns 0 unless a firmware command error occurs.
|
|
*
|
|
* If GID is found in MGM or MGM is empty, *index = *hash, *prev = -1
|
|
* and *mgm holds MGM entry.
|
|
*
|
|
* if GID is found in AMGM, *index = index in AMGM, *prev = index of
|
|
* previous entry in hash chain and *mgm holds AMGM entry.
|
|
*
|
|
* If no AMGM exists for given gid, *index = -1, *prev = index of last
|
|
* entry in hash chain and *mgm holds end of hash chain.
|
|
*/
|
|
static int find_mgm(struct mthca_dev *dev,
|
|
u8 *gid, struct mthca_mailbox *mgm_mailbox,
|
|
u16 *hash, int *prev, int *index)
|
|
{
|
|
struct mthca_mailbox *mailbox;
|
|
struct mthca_mgm *mgm = mgm_mailbox->buf;
|
|
u8 *mgid;
|
|
int err;
|
|
u8 status;
|
|
|
|
mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
|
|
if (IS_ERR(mailbox))
|
|
return -ENOMEM;
|
|
mgid = mailbox->buf;
|
|
|
|
memcpy(mgid, gid, 16);
|
|
|
|
err = mthca_MGID_HASH(dev, mailbox, hash, &status);
|
|
if (err)
|
|
goto out;
|
|
if (status) {
|
|
mthca_err(dev, "MGID_HASH returned status %02x\n", status);
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if (0)
|
|
mthca_dbg(dev, "Hash for %04x:%04x:%04x:%04x:"
|
|
"%04x:%04x:%04x:%04x is %04x\n",
|
|
be16_to_cpu(((__be16 *) gid)[0]),
|
|
be16_to_cpu(((__be16 *) gid)[1]),
|
|
be16_to_cpu(((__be16 *) gid)[2]),
|
|
be16_to_cpu(((__be16 *) gid)[3]),
|
|
be16_to_cpu(((__be16 *) gid)[4]),
|
|
be16_to_cpu(((__be16 *) gid)[5]),
|
|
be16_to_cpu(((__be16 *) gid)[6]),
|
|
be16_to_cpu(((__be16 *) gid)[7]),
|
|
*hash);
|
|
|
|
*index = *hash;
|
|
*prev = -1;
|
|
|
|
do {
|
|
err = mthca_READ_MGM(dev, *index, mgm_mailbox, &status);
|
|
if (err)
|
|
goto out;
|
|
if (status) {
|
|
mthca_err(dev, "READ_MGM returned status %02x\n", status);
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if (!memcmp(mgm->gid, zero_gid, 16)) {
|
|
if (*index != *hash) {
|
|
mthca_err(dev, "Found zero MGID in AMGM.\n");
|
|
err = -EINVAL;
|
|
}
|
|
goto out;
|
|
}
|
|
|
|
if (!memcmp(mgm->gid, gid, 16))
|
|
goto out;
|
|
|
|
*prev = *index;
|
|
*index = be32_to_cpu(mgm->next_gid_index) >> 6;
|
|
} while (*index);
|
|
|
|
*index = -1;
|
|
|
|
out:
|
|
mthca_free_mailbox(dev, mailbox);
|
|
return err;
|
|
}
|
|
|
|
int mthca_multicast_attach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
|
|
{
|
|
struct mthca_dev *dev = to_mdev(ibqp->device);
|
|
struct mthca_mailbox *mailbox;
|
|
struct mthca_mgm *mgm;
|
|
u16 hash;
|
|
int index, prev;
|
|
int link = 0;
|
|
int i;
|
|
int err;
|
|
u8 status;
|
|
|
|
mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
|
|
if (IS_ERR(mailbox))
|
|
return PTR_ERR(mailbox);
|
|
mgm = mailbox->buf;
|
|
|
|
mutex_lock(&dev->mcg_table.mutex);
|
|
|
|
err = find_mgm(dev, gid->raw, mailbox, &hash, &prev, &index);
|
|
if (err)
|
|
goto out;
|
|
|
|
if (index != -1) {
|
|
if (!memcmp(mgm->gid, zero_gid, 16))
|
|
memcpy(mgm->gid, gid->raw, 16);
|
|
} else {
|
|
link = 1;
|
|
|
|
index = mthca_alloc(&dev->mcg_table.alloc);
|
|
if (index == -1) {
|
|
mthca_err(dev, "No AMGM entries left\n");
|
|
err = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
err = mthca_READ_MGM(dev, index, mailbox, &status);
|
|
if (err)
|
|
goto out;
|
|
if (status) {
|
|
mthca_err(dev, "READ_MGM returned status %02x\n", status);
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
memset(mgm, 0, sizeof *mgm);
|
|
memcpy(mgm->gid, gid->raw, 16);
|
|
}
|
|
|
|
for (i = 0; i < MTHCA_QP_PER_MGM; ++i)
|
|
if (mgm->qp[i] == cpu_to_be32(ibqp->qp_num | (1 << 31))) {
|
|
mthca_dbg(dev, "QP %06x already a member of MGM\n",
|
|
ibqp->qp_num);
|
|
err = 0;
|
|
goto out;
|
|
} else if (!(mgm->qp[i] & cpu_to_be32(1 << 31))) {
|
|
mgm->qp[i] = cpu_to_be32(ibqp->qp_num | (1 << 31));
|
|
break;
|
|
}
|
|
|
|
if (i == MTHCA_QP_PER_MGM) {
|
|
mthca_err(dev, "MGM at index %x is full.\n", index);
|
|
err = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
err = mthca_WRITE_MGM(dev, index, mailbox, &status);
|
|
if (err)
|
|
goto out;
|
|
if (status) {
|
|
mthca_err(dev, "WRITE_MGM returned status %02x\n", status);
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if (!link)
|
|
goto out;
|
|
|
|
err = mthca_READ_MGM(dev, prev, mailbox, &status);
|
|
if (err)
|
|
goto out;
|
|
if (status) {
|
|
mthca_err(dev, "READ_MGM returned status %02x\n", status);
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
mgm->next_gid_index = cpu_to_be32(index << 6);
|
|
|
|
err = mthca_WRITE_MGM(dev, prev, mailbox, &status);
|
|
if (err)
|
|
goto out;
|
|
if (status) {
|
|
mthca_err(dev, "WRITE_MGM returned status %02x\n", status);
|
|
err = -EINVAL;
|
|
}
|
|
|
|
out:
|
|
if (err && link && index != -1) {
|
|
BUG_ON(index < dev->limits.num_mgms);
|
|
mthca_free(&dev->mcg_table.alloc, index);
|
|
}
|
|
mutex_unlock(&dev->mcg_table.mutex);
|
|
|
|
mthca_free_mailbox(dev, mailbox);
|
|
return err;
|
|
}
|
|
|
|
int mthca_multicast_detach(struct ib_qp *ibqp, union ib_gid *gid, u16 lid)
|
|
{
|
|
struct mthca_dev *dev = to_mdev(ibqp->device);
|
|
struct mthca_mailbox *mailbox;
|
|
struct mthca_mgm *mgm;
|
|
u16 hash;
|
|
int prev, index;
|
|
int i, loc;
|
|
int err;
|
|
u8 status;
|
|
|
|
mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL);
|
|
if (IS_ERR(mailbox))
|
|
return PTR_ERR(mailbox);
|
|
mgm = mailbox->buf;
|
|
|
|
mutex_lock(&dev->mcg_table.mutex);
|
|
|
|
err = find_mgm(dev, gid->raw, mailbox, &hash, &prev, &index);
|
|
if (err)
|
|
goto out;
|
|
|
|
if (index == -1) {
|
|
mthca_err(dev, "MGID %04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x "
|
|
"not found\n",
|
|
be16_to_cpu(((__be16 *) gid->raw)[0]),
|
|
be16_to_cpu(((__be16 *) gid->raw)[1]),
|
|
be16_to_cpu(((__be16 *) gid->raw)[2]),
|
|
be16_to_cpu(((__be16 *) gid->raw)[3]),
|
|
be16_to_cpu(((__be16 *) gid->raw)[4]),
|
|
be16_to_cpu(((__be16 *) gid->raw)[5]),
|
|
be16_to_cpu(((__be16 *) gid->raw)[6]),
|
|
be16_to_cpu(((__be16 *) gid->raw)[7]));
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
for (loc = -1, i = 0; i < MTHCA_QP_PER_MGM; ++i) {
|
|
if (mgm->qp[i] == cpu_to_be32(ibqp->qp_num | (1 << 31)))
|
|
loc = i;
|
|
if (!(mgm->qp[i] & cpu_to_be32(1 << 31)))
|
|
break;
|
|
}
|
|
|
|
if (loc == -1) {
|
|
mthca_err(dev, "QP %06x not found in MGM\n", ibqp->qp_num);
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
mgm->qp[loc] = mgm->qp[i - 1];
|
|
mgm->qp[i - 1] = 0;
|
|
|
|
err = mthca_WRITE_MGM(dev, index, mailbox, &status);
|
|
if (err)
|
|
goto out;
|
|
if (status) {
|
|
mthca_err(dev, "WRITE_MGM returned status %02x\n", status);
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
if (i != 1)
|
|
goto out;
|
|
|
|
if (prev == -1) {
|
|
/* Remove entry from MGM */
|
|
int amgm_index_to_free = be32_to_cpu(mgm->next_gid_index) >> 6;
|
|
if (amgm_index_to_free) {
|
|
err = mthca_READ_MGM(dev, amgm_index_to_free,
|
|
mailbox, &status);
|
|
if (err)
|
|
goto out;
|
|
if (status) {
|
|
mthca_err(dev, "READ_MGM returned status %02x\n",
|
|
status);
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
} else
|
|
memset(mgm->gid, 0, 16);
|
|
|
|
err = mthca_WRITE_MGM(dev, index, mailbox, &status);
|
|
if (err)
|
|
goto out;
|
|
if (status) {
|
|
mthca_err(dev, "WRITE_MGM returned status %02x\n", status);
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
if (amgm_index_to_free) {
|
|
BUG_ON(amgm_index_to_free < dev->limits.num_mgms);
|
|
mthca_free(&dev->mcg_table.alloc, amgm_index_to_free);
|
|
}
|
|
} else {
|
|
/* Remove entry from AMGM */
|
|
int curr_next_index = be32_to_cpu(mgm->next_gid_index) >> 6;
|
|
err = mthca_READ_MGM(dev, prev, mailbox, &status);
|
|
if (err)
|
|
goto out;
|
|
if (status) {
|
|
mthca_err(dev, "READ_MGM returned status %02x\n", status);
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
mgm->next_gid_index = cpu_to_be32(curr_next_index << 6);
|
|
|
|
err = mthca_WRITE_MGM(dev, prev, mailbox, &status);
|
|
if (err)
|
|
goto out;
|
|
if (status) {
|
|
mthca_err(dev, "WRITE_MGM returned status %02x\n", status);
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
BUG_ON(index < dev->limits.num_mgms);
|
|
mthca_free(&dev->mcg_table.alloc, index);
|
|
}
|
|
|
|
out:
|
|
mutex_unlock(&dev->mcg_table.mutex);
|
|
|
|
mthca_free_mailbox(dev, mailbox);
|
|
return err;
|
|
}
|
|
|
|
int __devinit mthca_init_mcg_table(struct mthca_dev *dev)
|
|
{
|
|
int err;
|
|
int table_size = dev->limits.num_mgms + dev->limits.num_amgms;
|
|
|
|
err = mthca_alloc_init(&dev->mcg_table.alloc,
|
|
table_size,
|
|
table_size - 1,
|
|
dev->limits.num_mgms);
|
|
if (err)
|
|
return err;
|
|
|
|
mutex_init(&dev->mcg_table.mutex);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void __devexit mthca_cleanup_mcg_table(struct mthca_dev *dev)
|
|
{
|
|
mthca_alloc_cleanup(&dev->mcg_table.alloc);
|
|
}
|