mlx4: Move the Mellanox driver

Moves the Mellanox driver into drivers/net/ethernet/mellanox/ and
make the necessary Kconfig and Makefile changes.

CC: Roland Dreier <roland@kernel.org>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>

1 files changed, 0 insertions, 928 deletions

diff --git a/drivers/net/mlx4/mcg.c b/drivers/net/mlx4/mcg.c
deleted file mode 100644
index cd1784593a3..00000000000
--- a/drivers/net/mlx4/mcg.c
+++ /dev/null
@@ -1,928 +0,0 @@
-/*
- * Copyright (c) 2006, 2007 Cisco Systems, Inc.  All rights reserved.
- * Copyright (c) 2007, 2008 Mellanox Technologies. 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/string.h>
-#include <linux/etherdevice.h>
-
-#include <linux/mlx4/cmd.h>
-
-#include "mlx4.h"
-
-#define MGM_QPN_MASK       0x00FFFFFF
-#define MGM_BLCK_LB_BIT    30
-
-static const u8 zero_gid[16];	/* automatically initialized to 0 */
-
-static int mlx4_READ_ENTRY(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_ENTRY(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_WRITE_PROMISC(struct mlx4_dev *dev, u8 vep_num, u8 port, u8 steer,
-			      struct mlx4_cmd_mailbox *mailbox)
-{
-	u32 in_mod;
-
-	in_mod = (u32) vep_num << 24 | (u32) port << 16 | steer << 1;
-	return mlx4_cmd(dev, mailbox->dma, in_mod, 0x1,
-			MLX4_CMD_WRITE_MCG, MLX4_CMD_TIME_CLASS_A);
-}
-
-static int mlx4_GID_HASH(struct mlx4_dev *dev, struct mlx4_cmd_mailbox *mailbox,
-			 u16 *hash, u8 op_mod)
-{
-	u64 imm;
-	int err;
-
-	err = mlx4_cmd_imm(dev, mailbox->dma, &imm, 0, op_mod,
-			   MLX4_CMD_MGID_HASH, MLX4_CMD_TIME_CLASS_A);
-
-	if (!err)
-		*hash = imm;
-
-	return err;
-}
-
-static struct mlx4_promisc_qp *get_promisc_qp(struct mlx4_dev *dev, u8 pf_num,
-					      enum mlx4_steer_type steer,
-					      u32 qpn)
-{
-	struct mlx4_steer *s_steer = &mlx4_priv(dev)->steer[pf_num];
-	struct mlx4_promisc_qp *pqp;
-
-	list_for_each_entry(pqp, &s_steer->promisc_qps[steer], list) {
-		if (pqp->qpn == qpn)
-			return pqp;
-	}
-	/* not found */
-	return NULL;
-}
-
-/*
- * Add new entry to steering data structure.
- * All promisc QPs should be added as well
- */
-static int new_steering_entry(struct mlx4_dev *dev, u8 vep_num, u8 port,
-			      enum mlx4_steer_type steer,
-			      unsigned int index, u32 qpn)
-{
-	struct mlx4_steer *s_steer;
-	struct mlx4_cmd_mailbox *mailbox;
-	struct mlx4_mgm *mgm;
-	u32 members_count;
-	struct mlx4_steer_index *new_entry;
-	struct mlx4_promisc_qp *pqp;
-	struct mlx4_promisc_qp *dqp = NULL;
-	u32 prot;
-	int err;
-	u8 pf_num;
-
-	pf_num = (dev->caps.num_ports == 1) ? vep_num : (vep_num << 1) | (port - 1);
-	s_steer = &mlx4_priv(dev)->steer[pf_num];
-	new_entry = kzalloc(sizeof *new_entry, GFP_KERNEL);
-	if (!new_entry)
-		return -ENOMEM;
-
-	INIT_LIST_HEAD(&new_entry->duplicates);
-	new_entry->index = index;
-	list_add_tail(&new_entry->list, &s_steer->steer_entries[steer]);
-
-	/* If the given qpn is also a promisc qp,
-	 * it should be inserted to duplicates list
-	 */
-	pqp = get_promisc_qp(dev, pf_num, steer, qpn);
-	if (pqp) {
-		dqp = kmalloc(sizeof *dqp, GFP_KERNEL);
-		if (!dqp) {
-			err = -ENOMEM;
-			goto out_alloc;
-		}
-		dqp->qpn = qpn;
-		list_add_tail(&dqp->list, &new_entry->duplicates);
-	}
-
-	/* if no promisc qps for this vep, we are done */
-	if (list_empty(&s_steer->promisc_qps[steer]))
-		return 0;
-
-	/* now need to add all the promisc qps to the new
-	 * steering entry, as they should also receive the packets
-	 * destined to this address */
-	mailbox = mlx4_alloc_cmd_mailbox(dev);
-	if (IS_ERR(mailbox)) {
-		err = -ENOMEM;
-		goto out_alloc;
-	}
-	mgm = mailbox->buf;
-
-	err = mlx4_READ_ENTRY(dev, index, mailbox);
-	if (err)
-		goto out_mailbox;
-
-	members_count = be32_to_cpu(mgm->members_count) & 0xffffff;
-	prot = be32_to_cpu(mgm->members_count) >> 30;
-	list_for_each_entry(pqp, &s_steer->promisc_qps[steer], list) {
-		/* don't add already existing qpn */
-		if (pqp->qpn == qpn)
-			continue;
-		if (members_count == MLX4_QP_PER_MGM) {
-			/* out of space */
-			err = -ENOMEM;
-			goto out_mailbox;
-		}
-
-		/* add the qpn */
-		mgm->qp[members_count++] = cpu_to_be32(pqp->qpn & MGM_QPN_MASK);
-	}
-	/* update the qps count and update the entry with all the promisc qps*/
-	mgm->members_count = cpu_to_be32(members_count | (prot << 30));
-	err = mlx4_WRITE_ENTRY(dev, index, mailbox);
-
-out_mailbox:
-	mlx4_free_cmd_mailbox(dev, mailbox);
-	if (!err)
-		return 0;
-out_alloc:
-	if (dqp) {
-		list_del(&dqp->list);
-		kfree(dqp);
-	}
-	list_del(&new_entry->list);
-	kfree(new_entry);
-	return err;
-}
-
-/* update the data structures with existing steering entry */
-static int existing_steering_entry(struct mlx4_dev *dev, u8 vep_num, u8 port,
-				   enum mlx4_steer_type steer,
-				   unsigned int index, u32 qpn)
-{
-	struct mlx4_steer *s_steer;
-	struct mlx4_steer_index *tmp_entry, *entry = NULL;
-	struct mlx4_promisc_qp *pqp;
-	struct mlx4_promisc_qp *dqp;
-	u8 pf_num;
-
-	pf_num = (dev->caps.num_ports == 1) ? vep_num : (vep_num << 1) | (port - 1);
-	s_steer = &mlx4_priv(dev)->steer[pf_num];
-
-	pqp = get_promisc_qp(dev, pf_num, steer, qpn);
-	if (!pqp)
-		return 0; /* nothing to do */
-
-	list_for_each_entry(tmp_entry, &s_steer->steer_entries[steer], list) {
-		if (tmp_entry->index == index) {
-			entry = tmp_entry;
-			break;
-		}
-	}
-	if (unlikely(!entry)) {
-		mlx4_warn(dev, "Steering entry at index %x is not registered\n", index);
-		return -EINVAL;
-	}
-
-	/* the given qpn is listed as a promisc qpn
-	 * we need to add it as a duplicate to this entry
-	 * for future references */
-	list_for_each_entry(dqp, &entry->duplicates, list) {
-		if (qpn == dqp->qpn)
-			return 0; /* qp is already duplicated */
-	}
-
-	/* add the qp as a duplicate on this index */
-	dqp = kmalloc(sizeof *dqp, GFP_KERNEL);
-	if (!dqp)
-		return -ENOMEM;
-	dqp->qpn = qpn;
-	list_add_tail(&dqp->list, &entry->duplicates);
-
-	return 0;
-}
-
-/* Check whether a qpn is a duplicate on steering entry
- * If so, it should not be removed from mgm */
-static bool check_duplicate_entry(struct mlx4_dev *dev, u8 vep_num, u8 port,
-				  enum mlx4_steer_type steer,
-				  unsigned int index, u32 qpn)
-{
-	struct mlx4_steer *s_steer;
-	struct mlx4_steer_index *tmp_entry, *entry = NULL;
-	struct mlx4_promisc_qp *dqp, *tmp_dqp;
-	u8 pf_num;
-
-	pf_num = (dev->caps.num_ports == 1) ? vep_num : (vep_num << 1) | (port - 1);
-	s_steer = &mlx4_priv(dev)->steer[pf_num];
-
-	/* if qp is not promisc, it cannot be duplicated */
-	if (!get_promisc_qp(dev, pf_num, steer, qpn))
-		return false;
-
-	/* The qp is promisc qp so it is a duplicate on this index
-	 * Find the index entry, and remove the duplicate */
-	list_for_each_entry(tmp_entry, &s_steer->steer_entries[steer], list) {
-		if (tmp_entry->index == index) {
-			entry = tmp_entry;
-			break;
-		}
-	}
-	if (unlikely(!entry)) {
-		mlx4_warn(dev, "Steering entry for index %x is not registered\n", index);
-		return false;
-	}
-	list_for_each_entry_safe(dqp, tmp_dqp, &entry->duplicates, list) {
-		if (dqp->qpn == qpn) {
-			list_del(&dqp->list);
-			kfree(dqp);
-		}
-	}
-	return true;
-}
-
-/* I a steering entry contains only promisc QPs, it can be removed. */
-static bool can_remove_steering_entry(struct mlx4_dev *dev, u8 vep_num, u8 port,
-				      enum mlx4_steer_type steer,
-				      unsigned int index, u32 tqpn)
-{
-	struct mlx4_steer *s_steer;
-	struct mlx4_cmd_mailbox *mailbox;
-	struct mlx4_mgm *mgm;
-	struct mlx4_steer_index *entry = NULL, *tmp_entry;
-	u32 qpn;
-	u32 members_count;
-	bool ret = false;
-	int i;
-	u8 pf_num;
-
-	pf_num = (dev->caps.num_ports == 1) ? vep_num : (vep_num << 1) | (port - 1);
-	s_steer = &mlx4_priv(dev)->steer[pf_num];
-
-	mailbox = mlx4_alloc_cmd_mailbox(dev);
-	if (IS_ERR(mailbox))
-		return false;
-	mgm = mailbox->buf;
-
-	if (mlx4_READ_ENTRY(dev, index, mailbox))
-		goto out;
-	members_count = be32_to_cpu(mgm->members_count) & 0xffffff;
-	for (i = 0;  i < members_count; i++) {
-		qpn = be32_to_cpu(mgm->qp[i]) & MGM_QPN_MASK;
-		if (!get_promisc_qp(dev, pf_num, steer, qpn) && qpn != tqpn) {
-			/* the qp is not promisc, the entry can't be removed */
-			goto out;
-		}
-	}
-	 /* All the qps currently registered for this entry are promiscuous,
-	  * Checking for duplicates */
-	ret = true;
-	list_for_each_entry_safe(entry, tmp_entry, &s_steer->steer_entries[steer], list) {
-		if (entry->index == index) {
-			if (list_empty(&entry->duplicates)) {
-				list_del(&entry->list);
-				kfree(entry);
-			} else {
-				/* This entry contains duplicates so it shouldn't be removed */
-				ret = false;
-				goto out;
-			}
-		}
-	}
-
-out:
-	mlx4_free_cmd_mailbox(dev, mailbox);
-	return ret;
-}
-
-static int add_promisc_qp(struct mlx4_dev *dev, u8 vep_num, u8 port,
-			  enum mlx4_steer_type steer, u32 qpn)
-{
-	struct mlx4_steer *s_steer;
-	struct mlx4_cmd_mailbox *mailbox;
-	struct mlx4_mgm *mgm;
-	struct mlx4_steer_index *entry;
-	struct mlx4_promisc_qp *pqp;
-	struct mlx4_promisc_qp *dqp;
-	u32 members_count;
-	u32 prot;
-	int i;
-	bool found;
-	int last_index;
-	int err;
-	u8 pf_num;
-	struct mlx4_priv *priv = mlx4_priv(dev);
-	pf_num = (dev->caps.num_ports == 1) ? vep_num : (vep_num << 1) | (port - 1);
-	s_steer = &mlx4_priv(dev)->steer[pf_num];
-
-	mutex_lock(&priv->mcg_table.mutex);
-
-	if (get_promisc_qp(dev, pf_num, steer, qpn)) {
-		err = 0;  /* Noting to do, already exists */
-		goto out_mutex;
-	}
-
-	pqp = kmalloc(sizeof *pqp, GFP_KERNEL);
-	if (!pqp) {
-		err = -ENOMEM;
-		goto out_mutex;
-	}
-	pqp->qpn = qpn;
-
-	mailbox = mlx4_alloc_cmd_mailbox(dev);
-	if (IS_ERR(mailbox)) {
-		err = -ENOMEM;
-		goto out_alloc;
-	}
-	mgm = mailbox->buf;
-
-	/* the promisc qp needs to be added for each one of the steering
-	 * entries, if it already exists, needs to be added as a duplicate
-	 * for this entry */
-	list_for_each_entry(entry, &s_steer->steer_entries[steer], list) {
-		err = mlx4_READ_ENTRY(dev, entry->index, mailbox);
-		if (err)
-			goto out_mailbox;
-
-		members_count = be32_to_cpu(mgm->members_count) & 0xffffff;
-		prot = be32_to_cpu(mgm->members_count) >> 30;
-		found = false;
-		for (i = 0; i < members_count; i++) {
-			if ((be32_to_cpu(mgm->qp[i]) & MGM_QPN_MASK) == qpn) {
-				/* Entry already exists, add to duplicates */
-				dqp = kmalloc(sizeof *dqp, GFP_KERNEL);
-				if (!dqp)
-					goto out_mailbox;
-				dqp->qpn = qpn;
-				list_add_tail(&dqp->list, &entry->duplicates);
-				found = true;
-			}
-		}
-		if (!found) {
-			/* Need to add the qpn to mgm */
-			if (members_count == MLX4_QP_PER_MGM) {
-				/* entry is full */
-				err = -ENOMEM;
-				goto out_mailbox;
-			}
-			mgm->qp[members_count++] = cpu_to_be32(qpn & MGM_QPN_MASK);
-			mgm->members_count = cpu_to_be32(members_count | (prot << 30));
-			err = mlx4_WRITE_ENTRY(dev, entry->index, mailbox);
-			if (err)
-				goto out_mailbox;
-		}
-		last_index = entry->index;
-	}
-
-	/* add the new qpn to list of promisc qps */
-	list_add_tail(&pqp->list, &s_steer->promisc_qps[steer]);
-	/* now need to add all the promisc qps to default entry */
-	memset(mgm, 0, sizeof *mgm);
-	members_count = 0;
-	list_for_each_entry(dqp, &s_steer->promisc_qps[steer], list)
-		mgm->qp[members_count++] = cpu_to_be32(dqp->qpn & MGM_QPN_MASK);
-	mgm->members_count = cpu_to_be32(members_count | MLX4_PROT_ETH << 30);
-
-	err = mlx4_WRITE_PROMISC(dev, vep_num, port, steer, mailbox);
-	if (err)
-		goto out_list;
-
-	mlx4_free_cmd_mailbox(dev, mailbox);
-	mutex_unlock(&priv->mcg_table.mutex);
-	return 0;
-
-out_list:
-	list_del(&pqp->list);
-out_mailbox:
-	mlx4_free_cmd_mailbox(dev, mailbox);
-out_alloc:
-	kfree(pqp);
-out_mutex:
-	mutex_unlock(&priv->mcg_table.mutex);
-	return err;
-}
-
-static int remove_promisc_qp(struct mlx4_dev *dev, u8 vep_num, u8 port,
-			     enum mlx4_steer_type steer, u32 qpn)
-{
-	struct mlx4_priv *priv = mlx4_priv(dev);
-	struct mlx4_steer *s_steer;
-	struct mlx4_cmd_mailbox *mailbox;
-	struct mlx4_mgm *mgm;
-	struct mlx4_steer_index *entry;
-	struct mlx4_promisc_qp *pqp;
-	struct mlx4_promisc_qp *dqp;
-	u32 members_count;
-	bool found;
-	bool back_to_list = false;
-	int loc, i;
-	int err;
-	u8 pf_num;
-
-	pf_num = (dev->caps.num_ports == 1) ? vep_num : (vep_num << 1) | (port - 1);
-	s_steer = &mlx4_priv(dev)->steer[pf_num];
-	mutex_lock(&priv->mcg_table.mutex);
-
-	pqp = get_promisc_qp(dev, pf_num, steer, qpn);
-	if (unlikely(!pqp)) {
-		mlx4_warn(dev, "QP %x is not promiscuous QP\n", qpn);
-		/* nothing to do */
-		err = 0;
-		goto out_mutex;
-	}
-
-	/*remove from list of promisc qps */
-	list_del(&pqp->list);
-
-	/* set the default entry not to include the removed one */
-	mailbox = mlx4_alloc_cmd_mailbox(dev);
-	if (IS_ERR(mailbox)) {
-		err = -ENOMEM;
-		back_to_list = true;
-		goto out_list;
-	}
-	mgm = mailbox->buf;
-	members_count = 0;
-	list_for_each_entry(dqp, &s_steer->promisc_qps[steer], list)
-		mgm->qp[members_count++] = cpu_to_be32(dqp->qpn & MGM_QPN_MASK);
-	mgm->members_count = cpu_to_be32(members_count | MLX4_PROT_ETH << 30);
-
-	err = mlx4_WRITE_PROMISC(dev, vep_num, port, steer, mailbox);
-	if (err)
-		goto out_mailbox;
-
-	/* remove the qp from all the steering entries*/
-	list_for_each_entry(entry, &s_steer->steer_entries[steer], list) {
-		found = false;
-		list_for_each_entry(dqp, &entry->duplicates, list) {
-			if (dqp->qpn == qpn) {
-				found = true;
-				break;
-			}
-		}
-		if (found) {
-			/* a duplicate, no need to change the mgm,
-			 * only update the duplicates list */
-			list_del(&dqp->list);
-			kfree(dqp);
-		} else {
-			err = mlx4_READ_ENTRY(dev, entry->index, mailbox);
-				if (err)
-					goto out_mailbox;
-			members_count = be32_to_cpu(mgm->members_count) & 0xffffff;
-			for (loc = -1, i = 0; i < members_count; ++i)
-				if ((be32_to_cpu(mgm->qp[i]) & MGM_QPN_MASK) == qpn)
-					loc = i;
-
-			mgm->members_count = cpu_to_be32(--members_count |
-							 (MLX4_PROT_ETH << 30));
-			mgm->qp[loc] = mgm->qp[i - 1];
-			mgm->qp[i - 1] = 0;
-
-			err = mlx4_WRITE_ENTRY(dev, entry->index, mailbox);
-				if (err)
-					goto out_mailbox;
-		}
-
-	}
-
-out_mailbox:
-	mlx4_free_cmd_mailbox(dev, mailbox);
-out_list:
-	if (back_to_list)
-		list_add_tail(&pqp->list, &s_steer->promisc_qps[steer]);
-	else
-		kfree(pqp);
-out_mutex:
-	mutex_unlock(&priv->mcg_table.mutex);
-	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_entry(struct mlx4_dev *dev, u8 port,
-		      u8 *gid, enum mlx4_protocol prot,
-		      enum mlx4_steer_type steer,
-		      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;
-	u8 op_mod = (prot == MLX4_PROT_ETH) ?
-		!!(dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_MC_STEER) : 0;
-
-	mailbox = mlx4_alloc_cmd_mailbox(dev);
-	if (IS_ERR(mailbox))
-		return -ENOMEM;
-	mgid = mailbox->buf;
-
-	memcpy(mgid, gid, 16);
-
-	err = mlx4_GID_HASH(dev, mailbox, hash, op_mod);
-	mlx4_free_cmd_mailbox(dev, mailbox);
-	if (err)
-		return err;
-
-	if (0)
-		mlx4_dbg(dev, "Hash for %pI6 is %04x\n", gid, *hash);
-
-	*index = *hash;
-	*prev  = -1;
-
-	do {
-		err = mlx4_READ_ENTRY(dev, *index, mgm_mailbox);
-		if (err)
-			return err;
-
-		if (!(be32_to_cpu(mgm->members_count) & 0xffffff)) {
-			if (*index != *hash) {
-				mlx4_err(dev, "Found zero MGID in AMGM.\n");
-				err = -EINVAL;
-			}
-			return err;
-		}
-
-		if (!memcmp(mgm->gid, gid, 16) &&
-		    be32_to_cpu(mgm->members_count) >> 30 == prot)
-			return err;
-
-		*prev = *index;
-		*index = be32_to_cpu(mgm->next_gid_index) >> 6;
-	} while (*index);
-
-	*index = -1;
-	return err;
-}
-
-int mlx4_qp_attach_common(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16],
-			  int block_mcast_loopback, enum mlx4_protocol prot,
-			  enum mlx4_steer_type steer)
-{
-	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;
-	u8 port = gid[5];
-	u8 new_entry = 0;
-
-	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_entry(dev, port, gid, prot, steer,
-			 mailbox, &hash, &prev, &index);
-	if (err)
-		goto out;
-
-	if (index != -1) {
-		if (!(be32_to_cpu(mgm->members_count) & 0xffffff)) {
-			new_entry = 1;
-			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;
-
-		memset(mgm, 0, sizeof *mgm);
-		memcpy(mgm->gid, gid, 16);
-	}
-
-	members_count = be32_to_cpu(mgm->members_count) & 0xffffff;
-	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 ((be32_to_cpu(mgm->qp[i]) & MGM_QPN_MASK) == qp->qpn) {
-			mlx4_dbg(dev, "QP %06x already a member of MGM\n", qp->qpn);
-			err = 0;
-			goto out;
-		}
-
-	if (block_mcast_loopback)
-		mgm->qp[members_count++] = cpu_to_be32((qp->qpn & MGM_QPN_MASK) |
-						       (1U << MGM_BLCK_LB_BIT));
-	else
-		mgm->qp[members_count++] = cpu_to_be32(qp->qpn & MGM_QPN_MASK);
-
-	mgm->members_count = cpu_to_be32(members_count | (u32) prot << 30);
-
-	err = mlx4_WRITE_ENTRY(dev, index, mailbox);
-	if (err)
-		goto out;
-
-	if (!link)
-		goto out;
-
-	err = mlx4_READ_ENTRY(dev, prev, mailbox);
-	if (err)
-		goto out;
-
-	mgm->next_gid_index = cpu_to_be32(index << 6);
-
-	err = mlx4_WRITE_ENTRY(dev, prev, mailbox);
-	if (err)
-		goto out;
-
-out:
-	if (prot == MLX4_PROT_ETH) {
-		/* manage the steering entry for promisc mode */
-		if (new_entry)
-			new_steering_entry(dev, 0, port, steer, index, qp->qpn);
-		else
-			existing_steering_entry(dev, 0, port, steer,
-						index, qp->qpn);
-	}
-	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;
-}
-
-int mlx4_qp_detach_common(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16],
-			  enum mlx4_protocol prot, enum mlx4_steer_type steer)
-{
-	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;
-	u8 port = gid[5];
-	bool removed_entry = false;
-
-	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_entry(dev, port, gid, prot, steer,
-			 mailbox, &hash, &prev, &index);
-	if (err)
-		goto out;
-
-	if (index == -1) {
-		mlx4_err(dev, "MGID %pI6 not found\n", gid);
-		err = -EINVAL;
-		goto out;
-	}
-
-	/* if this pq is also a promisc qp, it shouldn't be removed */
-	if (prot == MLX4_PROT_ETH &&
-	    check_duplicate_entry(dev, 0, port, steer, index, qp->qpn))
-		goto out;
-
-	members_count = be32_to_cpu(mgm->members_count) & 0xffffff;
-	for (loc = -1, i = 0; i < members_count; ++i)
-		if ((be32_to_cpu(mgm->qp[i]) & MGM_QPN_MASK) == 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 | (u32) prot << 30);
-	mgm->qp[loc]       = mgm->qp[i - 1];
-	mgm->qp[i - 1]     = 0;
-
-	if (prot == MLX4_PROT_ETH)
-		removed_entry = can_remove_steering_entry(dev, 0, port, steer, index, qp->qpn);
-	if (i != 1 && (prot != MLX4_PROT_ETH || !removed_entry)) {
-		err = mlx4_WRITE_ENTRY(dev, index, mailbox);
-		goto out;
-	}
-
-	/* We are going to delete the entry, members count should be 0 */
-	mgm->members_count = cpu_to_be32((u32) prot << 30);
-
-	if (prev == -1) {
-		/* Remove entry from MGM */
-		int amgm_index = be32_to_cpu(mgm->next_gid_index) >> 6;
-		if (amgm_index) {
-			err = mlx4_READ_ENTRY(dev, amgm_index, mailbox);
-			if (err)
-				goto out;
-		} else
-			memset(mgm->gid, 0, 16);
-
-		err = mlx4_WRITE_ENTRY(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_ENTRY(dev, prev, mailbox);
-		if (err)
-			goto out;
-
-		mgm->next_gid_index = cpu_to_be32(cur_next_index << 6);
-
-		err = mlx4_WRITE_ENTRY(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;
-}
-
-
-int mlx4_multicast_attach(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16],
-			  int block_mcast_loopback, enum mlx4_protocol prot)
-{
-	enum mlx4_steer_type steer;
-
-	steer = (is_valid_ether_addr(&gid[10])) ? MLX4_UC_STEER : MLX4_MC_STEER;
-
-	if (prot == MLX4_PROT_ETH &&
-			!(dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_MC_STEER))
-		return 0;
-
-	if (prot == MLX4_PROT_ETH)
-		gid[7] |= (steer << 1);
-
-	return mlx4_qp_attach_common(dev, qp, gid,
-				     block_mcast_loopback, prot,
-				     steer);
-}
-EXPORT_SYMBOL_GPL(mlx4_multicast_attach);
-
-int mlx4_multicast_detach(struct mlx4_dev *dev, struct mlx4_qp *qp, u8 gid[16],
-			  enum mlx4_protocol prot)
-{
-	enum mlx4_steer_type steer;
-
-	steer = (is_valid_ether_addr(&gid[10])) ? MLX4_UC_STEER : MLX4_MC_STEER;
-
-	if (prot == MLX4_PROT_ETH &&
-			!(dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_MC_STEER))
-		return 0;
-
-	if (prot == MLX4_PROT_ETH) {
-		gid[7] |= (steer << 1);
-	}
-
-	return mlx4_qp_detach_common(dev, qp, gid, prot, steer);
-}
-EXPORT_SYMBOL_GPL(mlx4_multicast_detach);
-
-
-int mlx4_multicast_promisc_add(struct mlx4_dev *dev, u32 qpn, u8 port)
-{
-	if (!(dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_MC_STEER))
-		return 0;
-
-
-	return add_promisc_qp(dev, 0, port, MLX4_MC_STEER, qpn);
-}
-EXPORT_SYMBOL_GPL(mlx4_multicast_promisc_add);
-
-int mlx4_multicast_promisc_remove(struct mlx4_dev *dev, u32 qpn, u8 port)
-{
-	if (!(dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_MC_STEER))
-		return 0;
-
-
-	return remove_promisc_qp(dev, 0, port, MLX4_MC_STEER, qpn);
-}
-EXPORT_SYMBOL_GPL(mlx4_multicast_promisc_remove);
-
-int mlx4_unicast_promisc_add(struct mlx4_dev *dev, u32 qpn, u8 port)
-{
-	if (!(dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_MC_STEER))
-		return 0;
-
-
-	return add_promisc_qp(dev, 0, port, MLX4_UC_STEER, qpn);
-}
-EXPORT_SYMBOL_GPL(mlx4_unicast_promisc_add);
-
-int mlx4_unicast_promisc_remove(struct mlx4_dev *dev, u32 qpn, u8 port)
-{
-	if (!(dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_MC_STEER))
-		return 0;
-
-	return remove_promisc_qp(dev, 0, port, MLX4_UC_STEER, qpn);
-}
-EXPORT_SYMBOL_GPL(mlx4_unicast_promisc_remove);
-
-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, 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);
-}