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Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx4/mcg.c')
-rw-r--r--drivers/net/ethernet/mellanox/mlx4/mcg.c928
1 files changed, 928 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx4/mcg.c b/drivers/net/ethernet/mellanox/mlx4/mcg.c
new file mode 100644
index 00000000000..cd1784593a3
--- /dev/null
+++ b/drivers/net/ethernet/mellanox/mlx4/mcg.c
@@ -0,0 +1,928 @@
+/*
+ * 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);
+}