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[/] [test_project/] [trunk/] [linux_sd_driver/] [drivers/] [net/] [mlx4/] [mcg.c] - Blame information for rev 62

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/*
 * Copyright (c) 2006, 2007 Cisco Systems, Inc.  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.
 */
 
#include <linux/init.h>
#include <linux/string.h>
#include <linux/slab.h>
 
#include <linux/mlx4/cmd.h>
 
#include "mlx4.h"
 
struct mlx4_mgm {
        __be32                  next_gid_index;
        __be32                  members_count;
        u32                     reserved[2];
        u8                      gid[16];
        __be32                  qp[MLX4_QP_PER_MGM];
};
 
static const u8 zero_gid[16];   /* automatically initialized to 0 */
 
static int mlx4_READ_MCG(struct mlx4_dev *dev, int index,
                         struct mlx4_cmd_mailbox *mailbox)
{
        return mlx4_cmd_box(dev, 0, mailbox->dma, index, 0, MLX4_CMD_READ_MCG,
                            MLX4_CMD_TIME_CLASS_A);
}
 
static int mlx4_WRITE_MCG(struct mlx4_dev *dev, int index,
                          struct mlx4_cmd_mailbox *mailbox)
{
        return mlx4_cmd(dev, mailbox->dma, index, 0, MLX4_CMD_WRITE_MCG,
                        MLX4_CMD_TIME_CLASS_A);
}
 
static int mlx4_MGID_HASH(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
                          u16 *hash)
{
        u64 imm;
        int err;
 
        err = mlx4_cmd_imm(dev, mailbox->dma, &imm, 0, 0, MLX4_CMD_MGID_HASH,
                           MLX4_CMD_TIME_CLASS_A);
 
        if (!err)
                *hash = imm;
 
        return err;
}
 
/*
 * 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 mlx4_dev *dev,
                    u8 *gid, struct mlx4_cmd_mailbox *mgm_mailbox,
                    u16 *hash, int *prev, int *index)
{
        struct mlx4_cmd_mailbox *mailbox;
        struct mlx4_mgm *mgm = mgm_mailbox->buf;
        u8 *mgid;
        int err;
 
        mailbox = mlx4_alloc_cmd_mailbox(dev);
        if (IS_ERR(mailbox))
                return -ENOMEM;
        mgid = mailbox->buf;
 
        memcpy(mgid, gid, 16);
 
        err = mlx4_MGID_HASH(dev, mailbox, hash);
        mlx4_free_cmd_mailbox(dev, mailbox);
        if (err)
                return err;
 
        if (0)
                mlx4_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 = mlx4_READ_MCG(dev, *index, mgm_mailbox);
                if (err)
                        return err;
 
                if (!memcmp(mgm->gid, zero_gid, 16)) {
                        if (*index != *hash) {
                                mlx4_err(dev, "Found zero MGID in AMGM.\n");
                                err = -EINVAL;
                        }
                        return err;
                }
 
                if (!memcmp(mgm->gid, gid, 16))
                        return err;
 
                *prev = *index;
                *index = be32_to_cpu(mgm->next_gid_index) >> 6;
        } while (*index);
 
        *index = -1;
        return err;
}
 
int mlx4_multicast_attach(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16])
{
        struct mlx4_priv *priv = mlx4_priv(dev);
        struct mlx4_cmd_mailbox *mailbox;
        struct mlx4_mgm *mgm;
        u32 members_count;
        u16 hash;
        int index, prev;
        int link = 0;
        int i;
        int err;
 
        mailbox = mlx4_alloc_cmd_mailbox(dev);
        if (IS_ERR(mailbox))
                return PTR_ERR(mailbox);
        mgm = mailbox->buf;
 
        mutex_lock(&priv->mcg_table.mutex);
 
        err = find_mgm(dev, gid, mailbox, &hash, &prev, &index);
        if (err)
                goto out;
 
        if (index != -1) {
                if (!memcmp(mgm->gid, zero_gid, 16))
                        memcpy(mgm->gid, gid, 16);
        } else {
                link = 1;
 
                index = mlx4_bitmap_alloc(&priv->mcg_table.bitmap);
                if (index == -1) {
                        mlx4_err(dev, "No AMGM entries left\n");
                        err = -ENOMEM;
                        goto out;
                }
                index += dev->caps.num_mgms;
 
                err = mlx4_READ_MCG(dev, index, mailbox);
                if (err)
                        goto out;
 
                memset(mgm, 0, sizeof *mgm);
                memcpy(mgm->gid, gid, 16);
        }
 
        members_count = be32_to_cpu(mgm->members_count);
        if (members_count == MLX4_QP_PER_MGM) {
                mlx4_err(dev, "MGM at index %x is full.\n", index);
                err = -ENOMEM;
                goto out;
        }
 
        for (i = 0; i < members_count; ++i)
                if (mgm->qp[i] == cpu_to_be32(qp->qpn)) {
                        mlx4_dbg(dev, "QP %06x already a member of MGM\n", qp->qpn);
                        err = 0;
                        goto out;
                }
 
        mgm->qp[members_count++] = cpu_to_be32(qp->qpn);
        mgm->members_count       = cpu_to_be32(members_count);
 
        err = mlx4_WRITE_MCG(dev, index, mailbox);
        if (err)
                goto out;
 
        if (!link)
                goto out;
 
        err = mlx4_READ_MCG(dev, prev, mailbox);
        if (err)
                goto out;
 
        mgm->next_gid_index = cpu_to_be32(index << 6);
 
        err = mlx4_WRITE_MCG(dev, prev, mailbox);
        if (err)
                goto out;
 
out:
        if (err && link && index != -1) {
                if (index < dev->caps.num_mgms)
                        mlx4_warn(dev, "Got AMGM index %d < %d",
                                  index, dev->caps.num_mgms);
                else
                        mlx4_bitmap_free(&priv->mcg_table.bitmap,
                                         index - dev->caps.num_mgms);
        }
        mutex_unlock(&priv->mcg_table.mutex);
 
        mlx4_free_cmd_mailbox(dev, mailbox);
        return err;
}
EXPORT_SYMBOL_GPL(mlx4_multicast_attach);
 
int mlx4_multicast_detach(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16])
{
        struct mlx4_priv *priv = mlx4_priv(dev);
        struct mlx4_cmd_mailbox *mailbox;
        struct mlx4_mgm *mgm;
        u32 members_count;
        u16 hash;
        int prev, index;
        int i, loc;
        int err;
 
        mailbox = mlx4_alloc_cmd_mailbox(dev);
        if (IS_ERR(mailbox))
                return PTR_ERR(mailbox);
        mgm = mailbox->buf;
 
        mutex_lock(&priv->mcg_table.mutex);
 
        err = find_mgm(dev, gid, mailbox, &hash, &prev, &index);
        if (err)
                goto out;
 
        if (index == -1) {
                mlx4_err(dev, "MGID %04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x "
                          "not found\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]));
                err = -EINVAL;
                goto out;
        }
 
        members_count = be32_to_cpu(mgm->members_count);
        for (loc = -1, i = 0; i < members_count; ++i)
                if (mgm->qp[i] == cpu_to_be32(qp->qpn))
                        loc = i;
 
        if (loc == -1) {
                mlx4_err(dev, "QP %06x not found in MGM\n", qp->qpn);
                err = -EINVAL;
                goto out;
        }
 
 
        mgm->members_count = cpu_to_be32(--members_count);
        mgm->qp[loc]       = mgm->qp[i - 1];
        mgm->qp[i - 1]     = 0;
 
        err = mlx4_WRITE_MCG(dev, index, mailbox);
        if (err)
                goto out;
 
        if (i != 1)
                goto out;
 
        if (prev == -1) {
                /* Remove entry from MGM */
                int amgm_index = be32_to_cpu(mgm->next_gid_index) >> 6;
                if (amgm_index) {
                        err = mlx4_READ_MCG(dev, amgm_index, mailbox);
                        if (err)
                                goto out;
                } else
                        memset(mgm->gid, 0, 16);
 
                err = mlx4_WRITE_MCG(dev, index, mailbox);
                if (err)
                        goto out;
 
                if (amgm_index) {
                        if (amgm_index < dev->caps.num_mgms)
                                mlx4_warn(dev, "MGM entry %d had AMGM index %d < %d",
                                          index, amgm_index, dev->caps.num_mgms);
                        else
                                mlx4_bitmap_free(&priv->mcg_table.bitmap,
                                                 amgm_index - dev->caps.num_mgms);
                }
        } else {
                /* Remove entry from AMGM */
                int cur_next_index = be32_to_cpu(mgm->next_gid_index) >> 6;
                err = mlx4_READ_MCG(dev, prev, mailbox);
                if (err)
                        goto out;
 
                mgm->next_gid_index = cpu_to_be32(cur_next_index << 6);
 
                err = mlx4_WRITE_MCG(dev, prev, mailbox);
                if (err)
                        goto out;
 
                if (index < dev->caps.num_mgms)
                        mlx4_warn(dev, "entry %d had next AMGM index %d < %d",
                                  prev, index, dev->caps.num_mgms);
                else
                        mlx4_bitmap_free(&priv->mcg_table.bitmap,
                                         index - dev->caps.num_mgms);
        }
 
out:
        mutex_unlock(&priv->mcg_table.mutex);
 
        mlx4_free_cmd_mailbox(dev, mailbox);
        return err;
}
EXPORT_SYMBOL_GPL(mlx4_multicast_detach);
 
int mlx4_init_mcg_table(struct mlx4_dev *dev)
{
        struct mlx4_priv *priv = mlx4_priv(dev);
        int err;
 
        err = mlx4_bitmap_init(&priv->mcg_table.bitmap,
                               dev->caps.num_amgms, dev->caps.num_amgms - 1, 0);
        if (err)
                return err;
 
        mutex_init(&priv->mcg_table.mutex);
 
        return 0;
}
 
void mlx4_cleanup_mcg_table(struct mlx4_dev *dev)
{
        mlx4_bitmap_cleanup(&mlx4_priv(dev)->mcg_table.bitmap);
}

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[/] [test_project/] [trunk/] [linux_sd_driver/] [drivers/] [net/] [mlx4/] [mcg.c] - Blame information for rev 62

Line No.	Rev	Author	Line
1	62	marcus.erl	`/*`
2			`* Copyright (c) 2006, 2007 Cisco Systems, Inc. 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
33			`#include <linux/init.h>`
34			`#include <linux/string.h>`
35			`#include <linux/slab.h>`
36
37			`#include <linux/mlx4/cmd.h>`
38
39			`#include "mlx4.h"`
40
41			`struct mlx4_mgm {`
42			`__be32 next_gid_index;`
43			`__be32 members_count;`
44			`u32 reserved[2];`
45			`u8 gid[16];`
46			`__be32 qp[MLX4_QP_PER_MGM];`
47			`};`
48
49			`static const u8 zero_gid[16]; /* automatically initialized to 0 */`
50
51			`static int mlx4_READ_MCG(struct mlx4_dev *dev, int index,`
52			`struct mlx4_cmd_mailbox *mailbox)`
53			`{`
54			`return mlx4_cmd_box(dev, 0, mailbox->dma, index, 0, MLX4_CMD_READ_MCG,`
55			`MLX4_CMD_TIME_CLASS_A);`
56			`}`
57
58			`static int mlx4_WRITE_MCG(struct mlx4_dev *dev, int index,`
59			`struct mlx4_cmd_mailbox *mailbox)`
60			`{`
61			`return mlx4_cmd(dev, mailbox->dma, index, 0, MLX4_CMD_WRITE_MCG,`
62			`MLX4_CMD_TIME_CLASS_A);`
63			`}`
64
65			`static int mlx4_MGID_HASH(struct mlx4_dev dev, struct mlx4_cmd_mailbox mailbox,`
66			`u16 *hash)`
67			`{`
68			`u64 imm;`
69			`int err;`
70
71			`err = mlx4_cmd_imm(dev, mailbox->dma, &imm, 0, 0, MLX4_CMD_MGID_HASH,`
72			`MLX4_CMD_TIME_CLASS_A);`
73
74			`if (!err)`
75			`*hash = imm;`
76
77			`return err;`
78			`}`
79
80			`/*`
81			`* Caller must hold MCG table semaphore. gid and mgm parameters must`
82			`* be properly aligned for command interface.`
83			`*`
84			`* Returns 0 unless a firmware command error occurs.`
85			`*`
86			`* If GID is found in MGM or MGM is empty, index = hash, *prev = -1`
87			`* and *mgm holds MGM entry.`
88			`*`
89			`* if GID is found in AMGM, index = index in AMGM, prev = index of`
90			`* previous entry in hash chain and *mgm holds AMGM entry.`
91			`*`
92			`* If no AMGM exists for given gid, index = -1, prev = index of last`
93			`* entry in hash chain and *mgm holds end of hash chain.`
94			`*/`
95			`static int find_mgm(struct mlx4_dev *dev,`
96			`u8 gid, struct mlx4_cmd_mailbox mgm_mailbox,`
97			`u16 hash, int prev, int *index)`
98			`{`
99			`struct mlx4_cmd_mailbox *mailbox;`
100			`struct mlx4_mgm *mgm = mgm_mailbox->buf;`
101			`u8 *mgid;`
102			`int err;`
103
104			`mailbox = mlx4_alloc_cmd_mailbox(dev);`
105			`if (IS_ERR(mailbox))`
106			`return -ENOMEM;`
107			`mgid = mailbox->buf;`
108
109			`memcpy(mgid, gid, 16);`
110
111			`err = mlx4_MGID_HASH(dev, mailbox, hash);`
112			`mlx4_free_cmd_mailbox(dev, mailbox);`
113			`if (err)`
114			`return err;`
115
116			`if (0)`
117			`mlx4_dbg(dev, "Hash for %04x:%04x:%04x:%04x:"`
118			`"%04x:%04x:%04x:%04x is %04x\n",`
119			`be16_to_cpu(((__be16 *) gid)[0]),`
120			`be16_to_cpu(((__be16 *) gid)[1]),`
121			`be16_to_cpu(((__be16 *) gid)[2]),`
122			`be16_to_cpu(((__be16 *) gid)[3]),`
123			`be16_to_cpu(((__be16 *) gid)[4]),`
124			`be16_to_cpu(((__be16 *) gid)[5]),`
125			`be16_to_cpu(((__be16 *) gid)[6]),`
126			`be16_to_cpu(((__be16 *) gid)[7]),`
127			`*hash);`
128
129			`index = hash;`
130			`*prev = -1;`
131
132			`do {`
133			`err = mlx4_READ_MCG(dev, *index, mgm_mailbox);`
134			`if (err)`
135			`return err;`
136
137			`if (!memcmp(mgm->gid, zero_gid, 16)) {`
138			`if (index != hash) {`
139			`mlx4_err(dev, "Found zero MGID in AMGM.\n");`
140			`err = -EINVAL;`
141			`}`
142			`return err;`
143			`}`
144
145			`if (!memcmp(mgm->gid, gid, 16))`
146			`return err;`
147
148			`prev = index;`
149			`*index = be32_to_cpu(mgm->next_gid_index) >> 6;`
150			`} while (*index);`
151
152			`*index = -1;`
153			`return err;`
154			`}`
155
156			`int mlx4_multicast_attach(struct mlx4_dev dev, struct mlx4_qp qp, u8 gid[16])`
157			`{`
158			`struct mlx4_priv *priv = mlx4_priv(dev);`
159			`struct mlx4_cmd_mailbox *mailbox;`
160			`struct mlx4_mgm *mgm;`
161			`u32 members_count;`
162			`u16 hash;`
163			`int index, prev;`
164			`int link = 0;`
165			`int i;`
166			`int err;`
167
168			`mailbox = mlx4_alloc_cmd_mailbox(dev);`
169			`if (IS_ERR(mailbox))`
170			`return PTR_ERR(mailbox);`
171			`mgm = mailbox->buf;`
172
173			`mutex_lock(&priv->mcg_table.mutex);`
174
175			`err = find_mgm(dev, gid, mailbox, &hash, &prev, &index);`
176			`if (err)`
177			`goto out;`
178
179			`if (index != -1) {`
180			`if (!memcmp(mgm->gid, zero_gid, 16))`
181			`memcpy(mgm->gid, gid, 16);`
182			`} else {`
183			`link = 1;`
184
185			`index = mlx4_bitmap_alloc(&priv->mcg_table.bitmap);`
186			`if (index == -1) {`
187			`mlx4_err(dev, "No AMGM entries left\n");`
188			`err = -ENOMEM;`
189			`goto out;`
190			`}`
191			`index += dev->caps.num_mgms;`
192
193			`err = mlx4_READ_MCG(dev, index, mailbox);`
194			`if (err)`
195			`goto out;`
196
197			`memset(mgm, 0, sizeof *mgm);`
198			`memcpy(mgm->gid, gid, 16);`
199			`}`
200
201			`members_count = be32_to_cpu(mgm->members_count);`
202			`if (members_count == MLX4_QP_PER_MGM) {`
203			`mlx4_err(dev, "MGM at index %x is full.\n", index);`
204			`err = -ENOMEM;`
205			`goto out;`
206			`}`
207
208			`for (i = 0; i < members_count; ++i)`
209			`if (mgm->qp[i] == cpu_to_be32(qp->qpn)) {`
210			`mlx4_dbg(dev, "QP %06x already a member of MGM\n", qp->qpn);`
211			`err = 0;`
212			`goto out;`
213			`}`
214
215			`mgm->qp[members_count++] = cpu_to_be32(qp->qpn);`
216			`mgm->members_count = cpu_to_be32(members_count);`
217
218			`err = mlx4_WRITE_MCG(dev, index, mailbox);`
219			`if (err)`
220			`goto out;`
221
222			`if (!link)`
223			`goto out;`
224
225			`err = mlx4_READ_MCG(dev, prev, mailbox);`
226			`if (err)`
227			`goto out;`
228
229			`mgm->next_gid_index = cpu_to_be32(index << 6);`
230
231			`err = mlx4_WRITE_MCG(dev, prev, mailbox);`
232			`if (err)`
233			`goto out;`
234
235			`out:`
236			`if (err && link && index != -1) {`
237			`if (index < dev->caps.num_mgms)`
238			`mlx4_warn(dev, "Got AMGM index %d < %d",`
239			`index, dev->caps.num_mgms);`
240			`else`
241			`mlx4_bitmap_free(&priv->mcg_table.bitmap,`
242			`index - dev->caps.num_mgms);`
243			`}`
244			`mutex_unlock(&priv->mcg_table.mutex);`
245
246			`mlx4_free_cmd_mailbox(dev, mailbox);`
247			`return err;`
248			`}`
249			`EXPORT_SYMBOL_GPL(mlx4_multicast_attach);`
250
251			`int mlx4_multicast_detach(struct mlx4_dev dev, struct mlx4_qp qp, u8 gid[16])`
252			`{`
253			`struct mlx4_priv *priv = mlx4_priv(dev);`
254			`struct mlx4_cmd_mailbox *mailbox;`
255			`struct mlx4_mgm *mgm;`
256			`u32 members_count;`
257			`u16 hash;`
258			`int prev, index;`
259			`int i, loc;`
260			`int err;`
261
262			`mailbox = mlx4_alloc_cmd_mailbox(dev);`
263			`if (IS_ERR(mailbox))`
264			`return PTR_ERR(mailbox);`
265			`mgm = mailbox->buf;`
266
267			`mutex_lock(&priv->mcg_table.mutex);`
268
269			`err = find_mgm(dev, gid, mailbox, &hash, &prev, &index);`
270			`if (err)`
271			`goto out;`
272
273			`if (index == -1) {`
274			`mlx4_err(dev, "MGID %04x:%04x:%04x:%04x:%04x:%04x:%04x:%04x "`
275			`"not found\n",`
276			`be16_to_cpu(((__be16 *) gid)[0]),`
277			`be16_to_cpu(((__be16 *) gid)[1]),`
278			`be16_to_cpu(((__be16 *) gid)[2]),`
279			`be16_to_cpu(((__be16 *) gid)[3]),`
280			`be16_to_cpu(((__be16 *) gid)[4]),`
281			`be16_to_cpu(((__be16 *) gid)[5]),`
282			`be16_to_cpu(((__be16 *) gid)[6]),`
283			`be16_to_cpu(((__be16 *) gid)[7]));`
284			`err = -EINVAL;`
285			`goto out;`
286			`}`
287
288			`members_count = be32_to_cpu(mgm->members_count);`
289			`for (loc = -1, i = 0; i < members_count; ++i)`
290			`if (mgm->qp[i] == cpu_to_be32(qp->qpn))`
291			`loc = i;`
292
293			`if (loc == -1) {`
294			`mlx4_err(dev, "QP %06x not found in MGM\n", qp->qpn);`
295			`err = -EINVAL;`
296			`goto out;`
297			`}`
298
299
300			`mgm->members_count = cpu_to_be32(--members_count);`
301			`mgm->qp[loc] = mgm->qp[i - 1];`
302			`mgm->qp[i - 1] = 0;`
303
304			`err = mlx4_WRITE_MCG(dev, index, mailbox);`
305			`if (err)`
306			`goto out;`
307
308			`if (i != 1)`
309			`goto out;`
310
311			`if (prev == -1) {`
312			`/* Remove entry from MGM */`
313			`int amgm_index = be32_to_cpu(mgm->next_gid_index) >> 6;`
314			`if (amgm_index) {`
315			`err = mlx4_READ_MCG(dev, amgm_index, mailbox);`
316			`if (err)`
317			`goto out;`
318			`} else`
319			`memset(mgm->gid, 0, 16);`
320
321			`err = mlx4_WRITE_MCG(dev, index, mailbox);`
322			`if (err)`
323			`goto out;`
324
325			`if (amgm_index) {`
326			`if (amgm_index < dev->caps.num_mgms)`
327			`mlx4_warn(dev, "MGM entry %d had AMGM index %d < %d",`
328			`index, amgm_index, dev->caps.num_mgms);`
329			`else`
330			`mlx4_bitmap_free(&priv->mcg_table.bitmap,`
331			`amgm_index - dev->caps.num_mgms);`
332			`}`
333			`} else {`
334			`/* Remove entry from AMGM */`
335			`int cur_next_index = be32_to_cpu(mgm->next_gid_index) >> 6;`
336			`err = mlx4_READ_MCG(dev, prev, mailbox);`
337			`if (err)`
338			`goto out;`
339
340			`mgm->next_gid_index = cpu_to_be32(cur_next_index << 6);`
341
342			`err = mlx4_WRITE_MCG(dev, prev, mailbox);`
343			`if (err)`
344			`goto out;`
345
346			`if (index < dev->caps.num_mgms)`
347			`mlx4_warn(dev, "entry %d had next AMGM index %d < %d",`
348			`prev, index, dev->caps.num_mgms);`
349			`else`
350			`mlx4_bitmap_free(&priv->mcg_table.bitmap,`
351			`index - dev->caps.num_mgms);`
352			`}`
353
354			`out:`
355			`mutex_unlock(&priv->mcg_table.mutex);`
356
357			`mlx4_free_cmd_mailbox(dev, mailbox);`
358			`return err;`
359			`}`
360			`EXPORT_SYMBOL_GPL(mlx4_multicast_detach);`
361
362			`int mlx4_init_mcg_table(struct mlx4_dev *dev)`
363			`{`
364			`struct mlx4_priv *priv = mlx4_priv(dev);`
365			`int err;`
366
367			`err = mlx4_bitmap_init(&priv->mcg_table.bitmap,`
368			`dev->caps.num_amgms, dev->caps.num_amgms - 1, 0);`
369			`if (err)`
370			`return err;`
371
372			`mutex_init(&priv->mcg_table.mutex);`
373
374			`return 0;`
375			`}`
376
377			`void mlx4_cleanup_mcg_table(struct mlx4_dev *dev)`
378			`{`
379			`mlx4_bitmap_cleanup(&mlx4_priv(dev)->mcg_table.bitmap);`
380			`}`