blob: ab7a29846bfa4a84b266bf253f626860644a3378 [file] [log] [blame]
/*
* 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);
}
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);
}
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);
}
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;
}
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);
}
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;
}
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);
}
static bool mlxsw_sib_port_created(struct mlxsw_sib *mlxsw_sib, u8 local_port)
{
return mlxsw_sib->ports[local_port] != NULL;
}
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;
}
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;
}
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);
}
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);
}
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);
}
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;
}
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);
}
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);
}
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;
}
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);
}
}
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);
}
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;
}
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);
}
static const 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;
}
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);
}
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);