/*
* 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;
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);
kfree(pqp);
/* 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]);
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.vep_mc_steering) : 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.vep_mc_steering)
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.vep_mc_steering)
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.vep_mc_steering)
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.vep_mc_steering)
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.vep_mc_steering)
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.vep_mc_steering)
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);
}
