diff options
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx4/port.c')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx4/port.c | 488 |
1 files changed, 488 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx4/port.c b/drivers/net/ethernet/mellanox/mlx4/port.c new file mode 100644 index 000000000000..163a314c148f --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlx4/port.c @@ -0,0 +1,488 @@ +/* + * Copyright (c) 2007 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/errno.h> +#include <linux/if_ether.h> + +#include <linux/mlx4/cmd.h> + +#include "mlx4.h" + +#define MLX4_MAC_VALID (1ull << 63) +#define MLX4_MAC_MASK 0xffffffffffffULL + +#define MLX4_VLAN_VALID (1u << 31) +#define MLX4_VLAN_MASK 0xfff + +void mlx4_init_mac_table(struct mlx4_dev *dev, struct mlx4_mac_table *table) +{ + int i; + + mutex_init(&table->mutex); + for (i = 0; i < MLX4_MAX_MAC_NUM; i++) { + table->entries[i] = 0; + table->refs[i] = 0; + } + table->max = 1 << dev->caps.log_num_macs; + table->total = 0; +} + +void mlx4_init_vlan_table(struct mlx4_dev *dev, struct mlx4_vlan_table *table) +{ + int i; + + mutex_init(&table->mutex); + for (i = 0; i < MLX4_MAX_VLAN_NUM; i++) { + table->entries[i] = 0; + table->refs[i] = 0; + } + table->max = (1 << dev->caps.log_num_vlans) - MLX4_VLAN_REGULAR; + table->total = 0; +} + +static int mlx4_set_port_mac_table(struct mlx4_dev *dev, u8 port, + __be64 *entries) +{ + struct mlx4_cmd_mailbox *mailbox; + u32 in_mod; + int err; + + mailbox = mlx4_alloc_cmd_mailbox(dev); + if (IS_ERR(mailbox)) + return PTR_ERR(mailbox); + + memcpy(mailbox->buf, entries, MLX4_MAC_TABLE_SIZE); + + in_mod = MLX4_SET_PORT_MAC_TABLE << 8 | port; + err = mlx4_cmd(dev, mailbox->dma, in_mod, 1, MLX4_CMD_SET_PORT, + MLX4_CMD_TIME_CLASS_B); + + mlx4_free_cmd_mailbox(dev, mailbox); + return err; +} + +static int mlx4_uc_steer_add(struct mlx4_dev *dev, u8 port, + u64 mac, int *qpn, u8 reserve) +{ + struct mlx4_qp qp; + u8 gid[16] = {0}; + int err; + + if (reserve) { + err = mlx4_qp_reserve_range(dev, 1, 1, qpn); + if (err) { + mlx4_err(dev, "Failed to reserve qp for mac registration\n"); + return err; + } + } + qp.qpn = *qpn; + + mac &= 0xffffffffffffULL; + mac = cpu_to_be64(mac << 16); + memcpy(&gid[10], &mac, ETH_ALEN); + gid[5] = port; + gid[7] = MLX4_UC_STEER << 1; + + err = mlx4_qp_attach_common(dev, &qp, gid, 0, + MLX4_PROT_ETH, MLX4_UC_STEER); + if (err && reserve) + mlx4_qp_release_range(dev, *qpn, 1); + + return err; +} + +static void mlx4_uc_steer_release(struct mlx4_dev *dev, u8 port, + u64 mac, int qpn, u8 free) +{ + struct mlx4_qp qp; + u8 gid[16] = {0}; + + qp.qpn = qpn; + mac &= 0xffffffffffffULL; + mac = cpu_to_be64(mac << 16); + memcpy(&gid[10], &mac, ETH_ALEN); + gid[5] = port; + gid[7] = MLX4_UC_STEER << 1; + + mlx4_qp_detach_common(dev, &qp, gid, MLX4_PROT_ETH, MLX4_UC_STEER); + if (free) + mlx4_qp_release_range(dev, qpn, 1); +} + +int mlx4_register_mac(struct mlx4_dev *dev, u8 port, u64 mac, int *qpn, u8 wrap) +{ + struct mlx4_port_info *info = &mlx4_priv(dev)->port[port]; + struct mlx4_mac_table *table = &info->mac_table; + struct mlx4_mac_entry *entry; + int i, err = 0; + int free = -1; + + if (dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_UC_STEER) { + err = mlx4_uc_steer_add(dev, port, mac, qpn, 1); + if (!err) { + entry = kmalloc(sizeof *entry, GFP_KERNEL); + if (!entry) { + mlx4_uc_steer_release(dev, port, mac, *qpn, 1); + return -ENOMEM; + } + entry->mac = mac; + err = radix_tree_insert(&info->mac_tree, *qpn, entry); + if (err) { + mlx4_uc_steer_release(dev, port, mac, *qpn, 1); + return err; + } + } else + return err; + } + mlx4_dbg(dev, "Registering MAC: 0x%llx\n", (unsigned long long) mac); + mutex_lock(&table->mutex); + for (i = 0; i < MLX4_MAX_MAC_NUM - 1; i++) { + if (free < 0 && !table->refs[i]) { + free = i; + continue; + } + + if (mac == (MLX4_MAC_MASK & be64_to_cpu(table->entries[i]))) { + /* MAC already registered, increase references count */ + ++table->refs[i]; + goto out; + } + } + + if (free < 0) { + err = -ENOMEM; + goto out; + } + + mlx4_dbg(dev, "Free MAC index is %d\n", free); + + if (table->total == table->max) { + /* No free mac entries */ + err = -ENOSPC; + goto out; + } + + /* Register new MAC */ + table->refs[free] = 1; + table->entries[free] = cpu_to_be64(mac | MLX4_MAC_VALID); + + err = mlx4_set_port_mac_table(dev, port, table->entries); + if (unlikely(err)) { + mlx4_err(dev, "Failed adding MAC: 0x%llx\n", (unsigned long long) mac); + table->refs[free] = 0; + table->entries[free] = 0; + goto out; + } + + if (!(dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_UC_STEER)) + *qpn = info->base_qpn + free; + ++table->total; +out: + mutex_unlock(&table->mutex); + return err; +} +EXPORT_SYMBOL_GPL(mlx4_register_mac); + +static int validate_index(struct mlx4_dev *dev, + struct mlx4_mac_table *table, int index) +{ + int err = 0; + + if (index < 0 || index >= table->max || !table->entries[index]) { + mlx4_warn(dev, "No valid Mac entry for the given index\n"); + err = -EINVAL; + } + return err; +} + +static int find_index(struct mlx4_dev *dev, + struct mlx4_mac_table *table, u64 mac) +{ + int i; + for (i = 0; i < MLX4_MAX_MAC_NUM; i++) { + if (mac == (MLX4_MAC_MASK & be64_to_cpu(table->entries[i]))) + return i; + } + /* Mac not found */ + return -EINVAL; +} + +void mlx4_unregister_mac(struct mlx4_dev *dev, u8 port, int qpn) +{ + struct mlx4_port_info *info = &mlx4_priv(dev)->port[port]; + struct mlx4_mac_table *table = &info->mac_table; + int index = qpn - info->base_qpn; + struct mlx4_mac_entry *entry; + + if (dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_UC_STEER) { + entry = radix_tree_lookup(&info->mac_tree, qpn); + if (entry) { + mlx4_uc_steer_release(dev, port, entry->mac, qpn, 1); + radix_tree_delete(&info->mac_tree, qpn); + index = find_index(dev, table, entry->mac); + kfree(entry); + } + } + + mutex_lock(&table->mutex); + + if (validate_index(dev, table, index)) + goto out; + + /* Check whether this address has reference count */ + if (!(--table->refs[index])) { + table->entries[index] = 0; + mlx4_set_port_mac_table(dev, port, table->entries); + --table->total; + } +out: + mutex_unlock(&table->mutex); +} +EXPORT_SYMBOL_GPL(mlx4_unregister_mac); + +int mlx4_replace_mac(struct mlx4_dev *dev, u8 port, int qpn, u64 new_mac, u8 wrap) +{ + struct mlx4_port_info *info = &mlx4_priv(dev)->port[port]; + struct mlx4_mac_table *table = &info->mac_table; + int index = qpn - info->base_qpn; + struct mlx4_mac_entry *entry; + int err; + + if (dev->caps.flags & MLX4_DEV_CAP_FLAG_VEP_UC_STEER) { + entry = radix_tree_lookup(&info->mac_tree, qpn); + if (!entry) + return -EINVAL; + index = find_index(dev, table, entry->mac); + mlx4_uc_steer_release(dev, port, entry->mac, qpn, 0); + entry->mac = new_mac; + err = mlx4_uc_steer_add(dev, port, entry->mac, &qpn, 0); + if (err || index < 0) + return err; + } + + mutex_lock(&table->mutex); + + err = validate_index(dev, table, index); + if (err) + goto out; + + table->entries[index] = cpu_to_be64(new_mac | MLX4_MAC_VALID); + + err = mlx4_set_port_mac_table(dev, port, table->entries); + if (unlikely(err)) { + mlx4_err(dev, "Failed adding MAC: 0x%llx\n", (unsigned long long) new_mac); + table->entries[index] = 0; + } +out: + mutex_unlock(&table->mutex); + return err; +} +EXPORT_SYMBOL_GPL(mlx4_replace_mac); +static int mlx4_set_port_vlan_table(struct mlx4_dev *dev, u8 port, + __be32 *entries) +{ + struct mlx4_cmd_mailbox *mailbox; + u32 in_mod; + int err; + + mailbox = mlx4_alloc_cmd_mailbox(dev); + if (IS_ERR(mailbox)) + return PTR_ERR(mailbox); + + memcpy(mailbox->buf, entries, MLX4_VLAN_TABLE_SIZE); + in_mod = MLX4_SET_PORT_VLAN_TABLE << 8 | port; + err = mlx4_cmd(dev, mailbox->dma, in_mod, 1, MLX4_CMD_SET_PORT, + MLX4_CMD_TIME_CLASS_B); + + mlx4_free_cmd_mailbox(dev, mailbox); + + return err; +} + +int mlx4_find_cached_vlan(struct mlx4_dev *dev, u8 port, u16 vid, int *idx) +{ + struct mlx4_vlan_table *table = &mlx4_priv(dev)->port[port].vlan_table; + int i; + + for (i = 0; i < MLX4_MAX_VLAN_NUM; ++i) { + if (table->refs[i] && + (vid == (MLX4_VLAN_MASK & + be32_to_cpu(table->entries[i])))) { + /* VLAN already registered, increase reference count */ + *idx = i; + return 0; + } + } + + return -ENOENT; +} +EXPORT_SYMBOL_GPL(mlx4_find_cached_vlan); + +int mlx4_register_vlan(struct mlx4_dev *dev, u8 port, u16 vlan, int *index) +{ + struct mlx4_vlan_table *table = &mlx4_priv(dev)->port[port].vlan_table; + int i, err = 0; + int free = -1; + + mutex_lock(&table->mutex); + + if (table->total == table->max) { + /* No free vlan entries */ + err = -ENOSPC; + goto out; + } + + for (i = MLX4_VLAN_REGULAR; i < MLX4_MAX_VLAN_NUM; i++) { + if (free < 0 && (table->refs[i] == 0)) { + free = i; + continue; + } + + if (table->refs[i] && + (vlan == (MLX4_VLAN_MASK & + be32_to_cpu(table->entries[i])))) { + /* Vlan already registered, increase references count */ + *index = i; + ++table->refs[i]; + goto out; + } + } + + if (free < 0) { + err = -ENOMEM; + goto out; + } + + /* Register new MAC */ + table->refs[free] = 1; + table->entries[free] = cpu_to_be32(vlan | MLX4_VLAN_VALID); + + err = mlx4_set_port_vlan_table(dev, port, table->entries); + if (unlikely(err)) { + mlx4_warn(dev, "Failed adding vlan: %u\n", vlan); + table->refs[free] = 0; + table->entries[free] = 0; + goto out; + } + + *index = free; + ++table->total; +out: + mutex_unlock(&table->mutex); + return err; +} +EXPORT_SYMBOL_GPL(mlx4_register_vlan); + +void mlx4_unregister_vlan(struct mlx4_dev *dev, u8 port, int index) +{ + struct mlx4_vlan_table *table = &mlx4_priv(dev)->port[port].vlan_table; + + if (index < MLX4_VLAN_REGULAR) { + mlx4_warn(dev, "Trying to free special vlan index %d\n", index); + return; + } + + mutex_lock(&table->mutex); + if (!table->refs[index]) { + mlx4_warn(dev, "No vlan entry for index %d\n", index); + goto out; + } + if (--table->refs[index]) { + mlx4_dbg(dev, "Have more references for index %d," + "no need to modify vlan table\n", index); + goto out; + } + table->entries[index] = 0; + mlx4_set_port_vlan_table(dev, port, table->entries); + --table->total; +out: + mutex_unlock(&table->mutex); +} +EXPORT_SYMBOL_GPL(mlx4_unregister_vlan); + +int mlx4_get_port_ib_caps(struct mlx4_dev *dev, u8 port, __be32 *caps) +{ + struct mlx4_cmd_mailbox *inmailbox, *outmailbox; + u8 *inbuf, *outbuf; + int err; + + inmailbox = mlx4_alloc_cmd_mailbox(dev); + if (IS_ERR(inmailbox)) + return PTR_ERR(inmailbox); + + outmailbox = mlx4_alloc_cmd_mailbox(dev); + if (IS_ERR(outmailbox)) { + mlx4_free_cmd_mailbox(dev, inmailbox); + return PTR_ERR(outmailbox); + } + + inbuf = inmailbox->buf; + outbuf = outmailbox->buf; + memset(inbuf, 0, 256); + memset(outbuf, 0, 256); + inbuf[0] = 1; + inbuf[1] = 1; + inbuf[2] = 1; + inbuf[3] = 1; + *(__be16 *) (&inbuf[16]) = cpu_to_be16(0x0015); + *(__be32 *) (&inbuf[20]) = cpu_to_be32(port); + + err = mlx4_cmd_box(dev, inmailbox->dma, outmailbox->dma, port, 3, + MLX4_CMD_MAD_IFC, MLX4_CMD_TIME_CLASS_C); + if (!err) + *caps = *(__be32 *) (outbuf + 84); + mlx4_free_cmd_mailbox(dev, inmailbox); + mlx4_free_cmd_mailbox(dev, outmailbox); + return err; +} + +int mlx4_SET_PORT(struct mlx4_dev *dev, u8 port) +{ + struct mlx4_cmd_mailbox *mailbox; + int err; + + if (dev->caps.port_type[port] == MLX4_PORT_TYPE_ETH) + return 0; + + mailbox = mlx4_alloc_cmd_mailbox(dev); + if (IS_ERR(mailbox)) + return PTR_ERR(mailbox); + + memset(mailbox->buf, 0, 256); + + ((__be32 *) mailbox->buf)[1] = dev->caps.ib_port_def_cap[port]; + err = mlx4_cmd(dev, mailbox->dma, port, 0, MLX4_CMD_SET_PORT, + MLX4_CMD_TIME_CLASS_B); + + mlx4_free_cmd_mailbox(dev, mailbox); + return err; +} |