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Diffstat (limited to 'drivers/net/mlx4/mcg.c')
-rw-r--r--drivers/net/mlx4/mcg.c363
1 files changed, 0 insertions, 363 deletions
diff --git a/drivers/net/mlx4/mcg.c b/drivers/net/mlx4/mcg.c
deleted file mode 100644
index c4f88b7ef7b..00000000000
--- a/drivers/net/mlx4/mcg.c
+++ /dev/null
@@ -1,363 +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/mlx4/cmd.h>
-
-#include "mlx4.h"
-
-#define MGM_QPN_MASK 0x00FFFFFF
-#define MGM_BLCK_LB_BIT 30
-
-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 %pI6 is %04x\n", gid, *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],
- int block_mcast_loopback)
-{
- 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;
-
- 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 ((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);
-
- 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 %pI6 not found\n", gid);
- err = -EINVAL;
- goto out;
- }
-
- members_count = be32_to_cpu(mgm->members_count);
- 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);
- mgm->qp[loc] = mgm->qp[i - 1];
- mgm->qp[i - 1] = 0;
-
- if (i != 1) {
- err = mlx4_WRITE_MCG(dev, index, mailbox);
- 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, 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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