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Release 4.11 drivers/net/ethernet/mellanox/mlxsw/switchib.c

/*
 * drivers/net/ethernet/mellanox/mlxsw/switchib.c
 * Copyright (c) 2016 Mellanox Technologies. All rights reserved.
 * Copyright (c) 2016 Elad Raz <eladr@mellanox.com>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 * 3. Neither the names of the copyright holders nor the names of its
 *    contributors may be used to endorse or promote products derived from
 *    this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/slab.h>
#include <linux/device.h>
#include <linux/skbuff.h>
#include <linux/if_vlan.h>
#include <net/switchdev.h>

#include "pci.h"
#include "core.h"
#include "reg.h"
#include "port.h"
#include "trap.h"
#include "txheader.h"
#include "ib.h"


static const char mlxsw_sib_driver_name[] = "mlxsw_switchib";

static const char mlxsw_sib2_driver_name[] = "mlxsw_switchib2";

struct mlxsw_sib_port;


struct mlxsw_sib {
	
struct mlxsw_sib_port **ports;
	
struct mlxsw_core *core;
	
const struct mlxsw_bus_info *bus_info;
};


struct mlxsw_sib_port {
	
struct mlxsw_sib *mlxsw_sib;
	
u8 local_port;
	struct {
		
u8 module;
	} 
mapping;
};

/* tx_v1_hdr_version
 * Tx header version.
 * Must be set to 1.
 */
MLXSW_ITEM32(tx_v1, hdr, version, 0x00, 28, 4);

/* tx_v1_hdr_ctl
 * Packet control type.
 * 0 - Ethernet control (e.g. EMADs, LACP)
 * 1 - Ethernet data
 */
MLXSW_ITEM32(tx_v1, hdr, ctl, 0x00, 26, 2);

/* tx_v1_hdr_proto
 * Packet protocol type. Must be set to 1 (Ethernet).
 */
MLXSW_ITEM32(tx_v1, hdr, proto, 0x00, 21, 3);

/* tx_v1_hdr_swid
 * Switch partition ID. Must be set to 0.
 */
MLXSW_ITEM32(tx_v1, hdr, swid, 0x00, 12, 3);

/* tx_v1_hdr_control_tclass
 * Indicates if the packet should use the control TClass and not one
 * of the data TClasses.
 */
MLXSW_ITEM32(tx_v1, hdr, control_tclass, 0x00, 6, 1);

/* tx_v1_hdr_port_mid
 * Destination local port for unicast packets.
 * Destination multicast ID for multicast packets.
 *
 * Control packets are directed to a specific egress port, while data
 * packets are transmitted through the CPU port (0) into the switch partition,
 * where forwarding rules are applied.
 */
MLXSW_ITEM32(tx_v1, hdr, port_mid, 0x04, 16, 16);

/* tx_v1_hdr_type
 * 0 - Data packets
 * 6 - Control packets
 */
MLXSW_ITEM32(tx_v1, hdr, type, 0x0C, 0, 4);


static void mlxsw_sib_tx_v1_hdr_construct(struct sk_buff *skb, const struct mlxsw_tx_info *tx_info) { char *txhdr = skb_push(skb, MLXSW_TXHDR_LEN); memset(txhdr, 0, MLXSW_TXHDR_LEN); mlxsw_tx_v1_hdr_version_set(txhdr, MLXSW_TXHDR_VERSION_1); mlxsw_tx_v1_hdr_ctl_set(txhdr, MLXSW_TXHDR_ETH_CTL); mlxsw_tx_v1_hdr_proto_set(txhdr, MLXSW_TXHDR_PROTO_ETH); mlxsw_tx_v1_hdr_swid_set(txhdr, 0); mlxsw_tx_v1_hdr_control_tclass_set(txhdr, 1); mlxsw_tx_v1_hdr_port_mid_set(txhdr, tx_info->local_port); mlxsw_tx_v1_hdr_type_set(txhdr, MLXSW_TXHDR_TYPE_CONTROL); }

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static int mlxsw_sib_port_admin_status_set(struct mlxsw_sib_port *mlxsw_sib_port, bool is_up) { struct mlxsw_sib *mlxsw_sib = mlxsw_sib_port->mlxsw_sib; char paos_pl[MLXSW_REG_PAOS_LEN]; mlxsw_reg_paos_pack(paos_pl, mlxsw_sib_port->local_port, is_up ? MLXSW_PORT_ADMIN_STATUS_UP : MLXSW_PORT_ADMIN_STATUS_DOWN); return mlxsw_reg_write(mlxsw_sib->core, MLXSW_REG(paos), paos_pl); }

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static int mlxsw_sib_port_mtu_set(struct mlxsw_sib_port *mlxsw_sib_port, u16 mtu) { struct mlxsw_sib *mlxsw_sib = mlxsw_sib_port->mlxsw_sib; char pmtu_pl[MLXSW_REG_PMTU_LEN]; int max_mtu; int err; mlxsw_reg_pmtu_pack(pmtu_pl, mlxsw_sib_port->local_port, 0); err = mlxsw_reg_query(mlxsw_sib->core, MLXSW_REG(pmtu), pmtu_pl); if (err) return err; max_mtu = mlxsw_reg_pmtu_max_mtu_get(pmtu_pl); if (mtu > max_mtu) return -EINVAL; mlxsw_reg_pmtu_pack(pmtu_pl, mlxsw_sib_port->local_port, mtu); return mlxsw_reg_write(mlxsw_sib->core, MLXSW_REG(pmtu), pmtu_pl); }

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static int mlxsw_sib_port_set(struct mlxsw_sib_port *mlxsw_sib_port, u8 port) { struct mlxsw_sib *mlxsw_sib = mlxsw_sib_port->mlxsw_sib; char plib_pl[MLXSW_REG_PLIB_LEN] = {0}; int err; mlxsw_reg_plib_local_port_set(plib_pl, mlxsw_sib_port->local_port); mlxsw_reg_plib_ib_port_set(plib_pl, port); err = mlxsw_reg_write(mlxsw_sib->core, MLXSW_REG(plib), plib_pl); return err; }

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static int mlxsw_sib_port_swid_set(struct mlxsw_sib_port *mlxsw_sib_port, u8 swid) { struct mlxsw_sib *mlxsw_sib = mlxsw_sib_port->mlxsw_sib; char pspa_pl[MLXSW_REG_PSPA_LEN]; mlxsw_reg_pspa_pack(pspa_pl, swid, mlxsw_sib_port->local_port); return mlxsw_reg_write(mlxsw_sib->core, MLXSW_REG(pspa), pspa_pl); }

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static int mlxsw_sib_port_module_info_get(struct mlxsw_sib *mlxsw_sib, u8 local_port, u8 *p_module, u8 *p_width) { char pmlp_pl[MLXSW_REG_PMLP_LEN]; int err; mlxsw_reg_pmlp_pack(pmlp_pl, local_port); err = mlxsw_reg_query(mlxsw_sib->core, MLXSW_REG(pmlp), pmlp_pl); if (err) return err; *p_module = mlxsw_reg_pmlp_module_get(pmlp_pl, 0); *p_width = mlxsw_reg_pmlp_width_get(pmlp_pl); return 0; }

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static int mlxsw_sib_port_speed_set(struct mlxsw_sib_port *mlxsw_sib_port, u16 speed, u16 width) { struct mlxsw_sib *mlxsw_sib = mlxsw_sib_port->mlxsw_sib; char ptys_pl[MLXSW_REG_PTYS_LEN]; mlxsw_reg_ptys_ib_pack(ptys_pl, mlxsw_sib_port->local_port, speed, width); return mlxsw_reg_write(mlxsw_sib->core, MLXSW_REG(ptys), ptys_pl); }

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static bool mlxsw_sib_port_created(struct mlxsw_sib *mlxsw_sib, u8 local_port) { return mlxsw_sib->ports[local_port] != NULL; }

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static int __mlxsw_sib_port_create(struct mlxsw_sib *mlxsw_sib, u8 local_port, u8 module, u8 width) { struct mlxsw_sib_port *mlxsw_sib_port; int err; mlxsw_sib_port = kzalloc(sizeof(*mlxsw_sib_port), GFP_KERNEL); if (!mlxsw_sib_port) return -ENOMEM; mlxsw_sib_port->mlxsw_sib = mlxsw_sib; mlxsw_sib_port->local_port = local_port; mlxsw_sib_port->mapping.module = module; err = mlxsw_sib_port_swid_set(mlxsw_sib_port, 0); if (err) { dev_err(mlxsw_sib->bus_info->dev, "Port %d: Failed to set SWID\n", mlxsw_sib_port->local_port); goto err_port_swid_set; } /* Expose the IB port number as it's front panel name */ err = mlxsw_sib_port_set(mlxsw_sib_port, module + 1); if (err) { dev_err(mlxsw_sib->bus_info->dev, "Port %d: Failed to set IB port\n", mlxsw_sib_port->local_port); goto err_port_ib_set; } /* Supports all speeds from SDR to FDR (bitmask) and support bus width * of 1x, 2x and 4x (3 bits bitmask) */ err = mlxsw_sib_port_speed_set(mlxsw_sib_port, MLXSW_REG_PTYS_IB_SPEED_EDR - 1, BIT(3) - 1); if (err) { dev_err(mlxsw_sib->bus_info->dev, "Port %d: Failed to set speed\n", mlxsw_sib_port->local_port); goto err_port_speed_set; } /* Change to the maximum MTU the device supports, the SMA will take * care of the active MTU */ err = mlxsw_sib_port_mtu_set(mlxsw_sib_port, MLXSW_IB_DEFAULT_MTU); if (err) { dev_err(mlxsw_sib->bus_info->dev, "Port %d: Failed to set MTU\n", mlxsw_sib_port->local_port); goto err_port_mtu_set; } err = mlxsw_sib_port_admin_status_set(mlxsw_sib_port, true); if (err) { dev_err(mlxsw_sib->bus_info->dev, "Port %d: Failed to change admin state to UP\n", mlxsw_sib_port->local_port); goto err_port_admin_set; } mlxsw_core_port_ib_set(mlxsw_sib->core, mlxsw_sib_port->local_port, mlxsw_sib_port); mlxsw_sib->ports[local_port] = mlxsw_sib_port; return 0; err_port_admin_set: err_port_mtu_set: err_port_speed_set: err_port_ib_set: mlxsw_sib_port_swid_set(mlxsw_sib_port, MLXSW_PORT_SWID_DISABLED_PORT); err_port_swid_set: kfree(mlxsw_sib_port); return err; }

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static int mlxsw_sib_port_create(struct mlxsw_sib *mlxsw_sib, u8 local_port, u8 module, u8 width) { int err; err = mlxsw_core_port_init(mlxsw_sib->core, local_port); if (err) { dev_err(mlxsw_sib->bus_info->dev, "Port %d: Failed to init core port\n", local_port); return err; } err = __mlxsw_sib_port_create(mlxsw_sib, local_port, module, width); if (err) goto err_port_create; return 0; err_port_create: mlxsw_core_port_fini(mlxsw_sib->core, local_port); return err; }

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static void __mlxsw_sib_port_remove(struct mlxsw_sib *mlxsw_sib, u8 local_port) { struct mlxsw_sib_port *mlxsw_sib_port = mlxsw_sib->ports[local_port]; mlxsw_core_port_clear(mlxsw_sib->core, local_port, mlxsw_sib); mlxsw_sib->ports[local_port] = NULL; mlxsw_sib_port_admin_status_set(mlxsw_sib_port, false); mlxsw_sib_port_swid_set(mlxsw_sib_port, MLXSW_PORT_SWID_DISABLED_PORT); kfree(mlxsw_sib_port); }

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static void mlxsw_sib_port_remove(struct mlxsw_sib *mlxsw_sib, u8 local_port) { __mlxsw_sib_port_remove(mlxsw_sib, local_port); mlxsw_core_port_fini(mlxsw_sib->core, local_port); }

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static void mlxsw_sib_ports_remove(struct mlxsw_sib *mlxsw_sib) { int i; for (i = 1; i < MLXSW_PORT_MAX_IB_PORTS; i++) if (mlxsw_sib_port_created(mlxsw_sib, i)) mlxsw_sib_port_remove(mlxsw_sib, i); kfree(mlxsw_sib->ports); }

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static int mlxsw_sib_ports_create(struct mlxsw_sib *mlxsw_sib) { size_t alloc_size; u8 module, width; int i; int err; alloc_size = sizeof(struct mlxsw_sib_port *) * MLXSW_PORT_MAX_IB_PORTS; mlxsw_sib->ports = kzalloc(alloc_size, GFP_KERNEL); if (!mlxsw_sib->ports) return -ENOMEM; for (i = 1; i < MLXSW_PORT_MAX_IB_PORTS; i++) { err = mlxsw_sib_port_module_info_get(mlxsw_sib, i, &module, &width); if (err) goto err_port_module_info_get; if (!width) continue; err = mlxsw_sib_port_create(mlxsw_sib, i, module, width); if (err) goto err_port_create; } return 0; err_port_create: err_port_module_info_get: for (i--; i >= 1; i--) if (mlxsw_sib_port_created(mlxsw_sib, i)) mlxsw_sib_port_remove(mlxsw_sib, i); kfree(mlxsw_sib->ports); return err; }

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static void mlxsw_sib_pude_ib_event_func(struct mlxsw_sib_port *mlxsw_sib_port, enum mlxsw_reg_pude_oper_status status) { if (status == MLXSW_PORT_OPER_STATUS_UP) pr_info("ib link for port %d - up\n", mlxsw_sib_port->mapping.module + 1); else pr_info("ib link for port %d - down\n", mlxsw_sib_port->mapping.module + 1); }

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static void mlxsw_sib_pude_event_func(const struct mlxsw_reg_info *reg, char *pude_pl, void *priv) { struct mlxsw_sib *mlxsw_sib = priv; struct mlxsw_sib_port *mlxsw_sib_port; enum mlxsw_reg_pude_oper_status status; u8 local_port; local_port = mlxsw_reg_pude_local_port_get(pude_pl); mlxsw_sib_port = mlxsw_sib->ports[local_port]; if (!mlxsw_sib_port) { dev_warn(mlxsw_sib->bus_info->dev, "Port %d: Link event received for non-existent port\n", local_port); return; } status = mlxsw_reg_pude_oper_status_get(pude_pl); mlxsw_sib_pude_ib_event_func(mlxsw_sib_port, status); }

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static const struct mlxsw_listener mlxsw_sib_listener[] = { MLXSW_EVENTL(mlxsw_sib_pude_event_func, PUDE, EMAD), };
static int mlxsw_sib_taps_init(struct mlxsw_sib *mlxsw_sib) { int i; int err; for (i = 0; i < ARRAY_SIZE(mlxsw_sib_listener); i++) { err = mlxsw_core_trap_register(mlxsw_sib->core, &mlxsw_sib_listener[i], mlxsw_sib); if (err) goto err_rx_listener_register; } return 0; err_rx_listener_register: for (i--; i >= 0; i--) { mlxsw_core_trap_unregister(mlxsw_sib->core, &mlxsw_sib_listener[i], mlxsw_sib); } return err; }

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static void mlxsw_sib_traps_fini(struct mlxsw_sib *mlxsw_sib) { int i; for (i = 0; i < ARRAY_SIZE(mlxsw_sib_listener); i++) { mlxsw_core_trap_unregister(mlxsw_sib->core, &mlxsw_sib_listener[i], mlxsw_sib); } }

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static int mlxsw_sib_basic_trap_groups_set(struct mlxsw_core *mlxsw_core) { char htgt_pl[MLXSW_REG_HTGT_LEN]; mlxsw_reg_htgt_pack(htgt_pl, MLXSW_REG_HTGT_TRAP_GROUP_EMAD, MLXSW_REG_HTGT_INVALID_POLICER, MLXSW_REG_HTGT_DEFAULT_PRIORITY, MLXSW_REG_HTGT_DEFAULT_TC); mlxsw_reg_htgt_swid_set(htgt_pl, MLXSW_PORT_SWID_ALL_SWIDS); mlxsw_reg_htgt_local_path_rdq_set(htgt_pl, MLXSW_REG_HTGT_LOCAL_PATH_RDQ_SIB_EMAD); return mlxsw_reg_write(mlxsw_core, MLXSW_REG(htgt), htgt_pl); }

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static int mlxsw_sib_init(struct mlxsw_core *mlxsw_core, const struct mlxsw_bus_info *mlxsw_bus_info) { struct mlxsw_sib *mlxsw_sib = mlxsw_core_driver_priv(mlxsw_core); int err; mlxsw_sib->core = mlxsw_core; mlxsw_sib->bus_info = mlxsw_bus_info; err = mlxsw_sib_ports_create(mlxsw_sib); if (err) { dev_err(mlxsw_sib->bus_info->dev, "Failed to create ports\n"); return err; } err = mlxsw_sib_taps_init(mlxsw_sib); if (err) { dev_err(mlxsw_sib->bus_info->dev, "Failed to set traps\n"); goto err_traps_init_err; } return 0; err_traps_init_err: mlxsw_sib_ports_remove(mlxsw_sib); return err; }

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static void mlxsw_sib_fini(struct mlxsw_core *mlxsw_core) { struct mlxsw_sib *mlxsw_sib = mlxsw_core_driver_priv(mlxsw_core); mlxsw_sib_traps_fini(mlxsw_sib); mlxsw_sib_ports_remove(mlxsw_sib); }

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static struct mlxsw_config_profile mlxsw_sib_config_profile = { .used_max_system_port = 1, .max_system_port = 48000, .used_max_ib_mc = 1, .max_ib_mc = 27, .used_max_pkey = 1, .max_pkey = 32, .swid_config = { { .used_type = 1, .type = MLXSW_PORT_SWID_TYPE_IB, } }, .resource_query_enable = 0, }; static struct mlxsw_driver mlxsw_sib_driver = { .kind = mlxsw_sib_driver_name, .priv_size = sizeof(struct mlxsw_sib), .init = mlxsw_sib_init, .fini = mlxsw_sib_fini, .basic_trap_groups_set = mlxsw_sib_basic_trap_groups_set, .txhdr_construct = mlxsw_sib_tx_v1_hdr_construct, .txhdr_len = MLXSW_TXHDR_LEN, .profile = &mlxsw_sib_config_profile, }; static struct mlxsw_driver mlxsw_sib2_driver = { .kind = mlxsw_sib2_driver_name, .priv_size = sizeof(struct mlxsw_sib), .init = mlxsw_sib_init, .fini = mlxsw_sib_fini, .basic_trap_groups_set = mlxsw_sib_basic_trap_groups_set, .txhdr_construct = mlxsw_sib_tx_v1_hdr_construct, .txhdr_len = MLXSW_TXHDR_LEN, .profile = &mlxsw_sib_config_profile, }; static const struct pci_device_id mlxsw_sib_pci_id_table[] = { {PCI_VDEVICE(MELLANOX, PCI_DEVICE_ID_MELLANOX_SWITCHIB), 0}, {0, }, }; static struct pci_driver mlxsw_sib_pci_driver = { .name = mlxsw_sib_driver_name, .id_table = mlxsw_sib_pci_id_table, }; static const struct pci_device_id mlxsw_sib2_pci_id_table[] = { {PCI_VDEVICE(MELLANOX, PCI_DEVICE_ID_MELLANOX_SWITCHIB2), 0}, {0, }, }; static struct pci_driver mlxsw_sib2_pci_driver = { .name = mlxsw_sib2_driver_name, .id_table = mlxsw_sib2_pci_id_table, };
static int __init mlxsw_sib_module_init(void) { int err; err = mlxsw_core_driver_register(&mlxsw_sib_driver); if (err) return err; err = mlxsw_core_driver_register(&mlxsw_sib2_driver); if (err) goto err_sib2_driver_register; err = mlxsw_pci_driver_register(&mlxsw_sib_pci_driver); if (err) goto err_sib_pci_driver_register; err = mlxsw_pci_driver_register(&mlxsw_sib2_pci_driver); if (err) goto err_sib2_pci_driver_register; return 0; err_sib2_pci_driver_register: mlxsw_pci_driver_unregister(&mlxsw_sib_pci_driver); err_sib_pci_driver_register: mlxsw_core_driver_unregister(&mlxsw_sib2_driver); err_sib2_driver_register: mlxsw_core_driver_unregister(&mlxsw_sib_driver); return err; }

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static void __exit mlxsw_sib_module_exit(void) { mlxsw_pci_driver_unregister(&mlxsw_sib2_pci_driver); mlxsw_pci_driver_unregister(&mlxsw_sib_pci_driver); mlxsw_core_driver_unregister(&mlxsw_sib2_driver); mlxsw_core_driver_unregister(&mlxsw_sib_driver); }

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module_init(mlxsw_sib_module_init); module_exit(mlxsw_sib_module_exit); MODULE_LICENSE("Dual BSD/GPL"); MODULE_AUTHOR("Elad Raz <eladr@@mellanox.com>"); MODULE_DESCRIPTION("Mellanox SwitchIB and SwitchIB-2 driver"); MODULE_ALIAS("mlxsw_switchib2"); MODULE_DEVICE_TABLE(pci, mlxsw_sib_pci_id_table); MODULE_DEVICE_TABLE(pci, mlxsw_sib2_pci_id_table);

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Nogah Frankel1566.49%480.00%
Total2403100.00%5100.00%
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