2
0
mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-23 04:34:11 +08:00
linux-next/net/dsa/slave.c

1690 lines
41 KiB
C
Raw Normal View History

// SPDX-License-Identifier: GPL-2.0-or-later
net: Distributed Switch Architecture protocol support Distributed Switch Architecture is a protocol for managing hardware switch chips. It consists of a set of MII management registers and commands to configure the switch, and an ethernet header format to signal which of the ports of the switch a packet was received from or is intended to be sent to. The switches that this driver supports are typically embedded in access points and routers, and a typical setup with a DSA switch looks something like this: +-----------+ +-----------+ | | RGMII | | | +-------+ +------ 1000baseT MDI ("WAN") | | | 6-port +------ 1000baseT MDI ("LAN1") | CPU | | ethernet +------ 1000baseT MDI ("LAN2") | |MIImgmt| switch +------ 1000baseT MDI ("LAN3") | +-------+ w/5 PHYs +------ 1000baseT MDI ("LAN4") | | | | +-----------+ +-----------+ The switch driver presents each port on the switch as a separate network interface to Linux, polls the switch to maintain software link state of those ports, forwards MII management interface accesses to those network interfaces (e.g. as done by ethtool) to the switch, and exposes the switch's hardware statistics counters via the appropriate Linux kernel interfaces. This initial patch supports the MII management interface register layout of the Marvell 88E6123, 88E6161 and 88E6165 switch chips, and supports the "Ethertype DSA" packet tagging format. (There is no officially registered ethertype for the Ethertype DSA packet format, so we just grab a random one. The ethertype to use is programmed into the switch, and the switch driver uses the value of ETH_P_EDSA for this, so this define can be changed at any time in the future if the one we chose is allocated to another protocol or if Ethertype DSA gets its own officially registered ethertype, and everything will continue to work.) Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Tested-by: Nicolas Pitre <nico@marvell.com> Tested-by: Byron Bradley <byron.bbradley@gmail.com> Tested-by: Tim Ellis <tim.ellis@mac.com> Tested-by: Peter van Valderen <linux@ddcrew.com> Tested-by: Dirk Teurlings <dirk@upexia.nl> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-07 21:44:02 +08:00
/*
* net/dsa/slave.c - Slave device handling
dsa: add switch chip cascading support The initial version of the DSA driver only supported a single switch chip per network interface, while DSA-capable switch chips can be interconnected to form a tree of switch chips. This patch adds support for multiple switch chips on a network interface. An example topology for a 16-port device with an embedded CPU is as follows: +-----+ +--------+ +--------+ | |eth0 10| switch |9 10| switch | | CPU +----------+ +-------+ | | | | chip 0 | | chip 1 | +-----+ +---++---+ +---++---+ || || || || ||1000baseT ||1000baseT ||ports 1-8 ||ports 9-16 This requires a couple of interdependent changes in the DSA layer: - The dsa platform driver data needs to be extended: there is still only one netdevice per DSA driver instance (eth0 in the example above), but each of the switch chips in the tree needs its own mii_bus device pointer, MII management bus address, and port name array. (include/net/dsa.h) The existing in-tree dsa users need some small changes to deal with this. (arch/arm) - The DSA and Ethertype DSA tagging modules need to be extended to use the DSA device ID field on receive and demultiplex the packet accordingly, and fill in the DSA device ID field on transmit according to which switch chip the packet is heading to. (net/dsa/tag_{dsa,edsa}.c) - The concept of "CPU port", which is the switch chip port that the CPU is connected to (port 10 on switch chip 0 in the example), needs to be extended with the concept of "upstream port", which is the port on the switch chip that will bring us one hop closer to the CPU (port 10 for both switch chips in the example above). - The dsa platform data needs to specify which ports on which switch chips are links to other switch chips, so that we can enable DSA tagging mode on them. (For inter-switch links, we always use non-EtherType DSA tagging, since it has lower overhead. The CPU link uses dsa or edsa tagging depending on what the 'root' switch chip supports.) This is done by specifying "dsa" for the given port in the port array. - The dsa platform data needs to be extended with information on via which port to reach any given switch chip from any given switch chip. This info is specified via the per-switch chip data struct ->rtable[] array, which gives the nexthop ports for each of the other switches in the tree. For the example topology above, the dsa platform data would look something like this: static struct dsa_chip_data sw[2] = { { .mii_bus = &foo, .sw_addr = 1, .port_names[0] = "p1", .port_names[1] = "p2", .port_names[2] = "p3", .port_names[3] = "p4", .port_names[4] = "p5", .port_names[5] = "p6", .port_names[6] = "p7", .port_names[7] = "p8", .port_names[9] = "dsa", .port_names[10] = "cpu", .rtable = (s8 []){ -1, 9, }, }, { .mii_bus = &foo, .sw_addr = 2, .port_names[0] = "p9", .port_names[1] = "p10", .port_names[2] = "p11", .port_names[3] = "p12", .port_names[4] = "p13", .port_names[5] = "p14", .port_names[6] = "p15", .port_names[7] = "p16", .port_names[10] = "dsa", .rtable = (s8 []){ 10, -1, }, }, }, static struct dsa_platform_data pd = { .netdev = &foo, .nr_switches = 2, .sw = sw, }; Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Tested-by: Gary Thomas <gary@mlbassoc.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-03-20 17:52:09 +08:00
* Copyright (c) 2008-2009 Marvell Semiconductor
net: Distributed Switch Architecture protocol support Distributed Switch Architecture is a protocol for managing hardware switch chips. It consists of a set of MII management registers and commands to configure the switch, and an ethernet header format to signal which of the ports of the switch a packet was received from or is intended to be sent to. The switches that this driver supports are typically embedded in access points and routers, and a typical setup with a DSA switch looks something like this: +-----------+ +-----------+ | | RGMII | | | +-------+ +------ 1000baseT MDI ("WAN") | | | 6-port +------ 1000baseT MDI ("LAN1") | CPU | | ethernet +------ 1000baseT MDI ("LAN2") | |MIImgmt| switch +------ 1000baseT MDI ("LAN3") | +-------+ w/5 PHYs +------ 1000baseT MDI ("LAN4") | | | | +-----------+ +-----------+ The switch driver presents each port on the switch as a separate network interface to Linux, polls the switch to maintain software link state of those ports, forwards MII management interface accesses to those network interfaces (e.g. as done by ethtool) to the switch, and exposes the switch's hardware statistics counters via the appropriate Linux kernel interfaces. This initial patch supports the MII management interface register layout of the Marvell 88E6123, 88E6161 and 88E6165 switch chips, and supports the "Ethertype DSA" packet tagging format. (There is no officially registered ethertype for the Ethertype DSA packet format, so we just grab a random one. The ethertype to use is programmed into the switch, and the switch driver uses the value of ETH_P_EDSA for this, so this define can be changed at any time in the future if the one we chose is allocated to another protocol or if Ethertype DSA gets its own officially registered ethertype, and everything will continue to work.) Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Tested-by: Nicolas Pitre <nico@marvell.com> Tested-by: Byron Bradley <byron.bbradley@gmail.com> Tested-by: Tim Ellis <tim.ellis@mac.com> Tested-by: Peter van Valderen <linux@ddcrew.com> Tested-by: Dirk Teurlings <dirk@upexia.nl> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-07 21:44:02 +08:00
*/
#include <linux/list.h>
#include <linux/etherdevice.h>
#include <linux/netdevice.h>
net: Distributed Switch Architecture protocol support Distributed Switch Architecture is a protocol for managing hardware switch chips. It consists of a set of MII management registers and commands to configure the switch, and an ethernet header format to signal which of the ports of the switch a packet was received from or is intended to be sent to. The switches that this driver supports are typically embedded in access points and routers, and a typical setup with a DSA switch looks something like this: +-----------+ +-----------+ | | RGMII | | | +-------+ +------ 1000baseT MDI ("WAN") | | | 6-port +------ 1000baseT MDI ("LAN1") | CPU | | ethernet +------ 1000baseT MDI ("LAN2") | |MIImgmt| switch +------ 1000baseT MDI ("LAN3") | +-------+ w/5 PHYs +------ 1000baseT MDI ("LAN4") | | | | +-----------+ +-----------+ The switch driver presents each port on the switch as a separate network interface to Linux, polls the switch to maintain software link state of those ports, forwards MII management interface accesses to those network interfaces (e.g. as done by ethtool) to the switch, and exposes the switch's hardware statistics counters via the appropriate Linux kernel interfaces. This initial patch supports the MII management interface register layout of the Marvell 88E6123, 88E6161 and 88E6165 switch chips, and supports the "Ethertype DSA" packet tagging format. (There is no officially registered ethertype for the Ethertype DSA packet format, so we just grab a random one. The ethertype to use is programmed into the switch, and the switch driver uses the value of ETH_P_EDSA for this, so this define can be changed at any time in the future if the one we chose is allocated to another protocol or if Ethertype DSA gets its own officially registered ethertype, and everything will continue to work.) Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Tested-by: Nicolas Pitre <nico@marvell.com> Tested-by: Byron Bradley <byron.bbradley@gmail.com> Tested-by: Tim Ellis <tim.ellis@mac.com> Tested-by: Peter van Valderen <linux@ddcrew.com> Tested-by: Dirk Teurlings <dirk@upexia.nl> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-07 21:44:02 +08:00
#include <linux/phy.h>
#include <linux/phy_fixed.h>
#include <linux/phylink.h>
#include <linux/of_net.h>
#include <linux/of_mdio.h>
#include <linux/mdio.h>
#include <net/rtnetlink.h>
#include <net/pkt_cls.h>
#include <net/tc_act/tc_mirred.h>
#include <linux/if_bridge.h>
#include <linux/netpoll.h>
#include <linux/ptp_classify.h>
net: Distributed Switch Architecture protocol support Distributed Switch Architecture is a protocol for managing hardware switch chips. It consists of a set of MII management registers and commands to configure the switch, and an ethernet header format to signal which of the ports of the switch a packet was received from or is intended to be sent to. The switches that this driver supports are typically embedded in access points and routers, and a typical setup with a DSA switch looks something like this: +-----------+ +-----------+ | | RGMII | | | +-------+ +------ 1000baseT MDI ("WAN") | | | 6-port +------ 1000baseT MDI ("LAN1") | CPU | | ethernet +------ 1000baseT MDI ("LAN2") | |MIImgmt| switch +------ 1000baseT MDI ("LAN3") | +-------+ w/5 PHYs +------ 1000baseT MDI ("LAN4") | | | | +-----------+ +-----------+ The switch driver presents each port on the switch as a separate network interface to Linux, polls the switch to maintain software link state of those ports, forwards MII management interface accesses to those network interfaces (e.g. as done by ethtool) to the switch, and exposes the switch's hardware statistics counters via the appropriate Linux kernel interfaces. This initial patch supports the MII management interface register layout of the Marvell 88E6123, 88E6161 and 88E6165 switch chips, and supports the "Ethertype DSA" packet tagging format. (There is no officially registered ethertype for the Ethertype DSA packet format, so we just grab a random one. The ethertype to use is programmed into the switch, and the switch driver uses the value of ETH_P_EDSA for this, so this define can be changed at any time in the future if the one we chose is allocated to another protocol or if Ethertype DSA gets its own officially registered ethertype, and everything will continue to work.) Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Tested-by: Nicolas Pitre <nico@marvell.com> Tested-by: Byron Bradley <byron.bbradley@gmail.com> Tested-by: Tim Ellis <tim.ellis@mac.com> Tested-by: Peter van Valderen <linux@ddcrew.com> Tested-by: Dirk Teurlings <dirk@upexia.nl> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-07 21:44:02 +08:00
#include "dsa_priv.h"
static bool dsa_slave_dev_check(const struct net_device *dev);
net: Distributed Switch Architecture protocol support Distributed Switch Architecture is a protocol for managing hardware switch chips. It consists of a set of MII management registers and commands to configure the switch, and an ethernet header format to signal which of the ports of the switch a packet was received from or is intended to be sent to. The switches that this driver supports are typically embedded in access points and routers, and a typical setup with a DSA switch looks something like this: +-----------+ +-----------+ | | RGMII | | | +-------+ +------ 1000baseT MDI ("WAN") | | | 6-port +------ 1000baseT MDI ("LAN1") | CPU | | ethernet +------ 1000baseT MDI ("LAN2") | |MIImgmt| switch +------ 1000baseT MDI ("LAN3") | +-------+ w/5 PHYs +------ 1000baseT MDI ("LAN4") | | | | +-----------+ +-----------+ The switch driver presents each port on the switch as a separate network interface to Linux, polls the switch to maintain software link state of those ports, forwards MII management interface accesses to those network interfaces (e.g. as done by ethtool) to the switch, and exposes the switch's hardware statistics counters via the appropriate Linux kernel interfaces. This initial patch supports the MII management interface register layout of the Marvell 88E6123, 88E6161 and 88E6165 switch chips, and supports the "Ethertype DSA" packet tagging format. (There is no officially registered ethertype for the Ethertype DSA packet format, so we just grab a random one. The ethertype to use is programmed into the switch, and the switch driver uses the value of ETH_P_EDSA for this, so this define can be changed at any time in the future if the one we chose is allocated to another protocol or if Ethertype DSA gets its own officially registered ethertype, and everything will continue to work.) Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Tested-by: Nicolas Pitre <nico@marvell.com> Tested-by: Byron Bradley <byron.bbradley@gmail.com> Tested-by: Tim Ellis <tim.ellis@mac.com> Tested-by: Peter van Valderen <linux@ddcrew.com> Tested-by: Dirk Teurlings <dirk@upexia.nl> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-07 21:44:02 +08:00
/* slave mii_bus handling ***************************************************/
static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg)
{
struct dsa_switch *ds = bus->priv;
if (ds->phys_mii_mask & (1 << addr))
return ds->ops->phy_read(ds, addr, reg);
net: Distributed Switch Architecture protocol support Distributed Switch Architecture is a protocol for managing hardware switch chips. It consists of a set of MII management registers and commands to configure the switch, and an ethernet header format to signal which of the ports of the switch a packet was received from or is intended to be sent to. The switches that this driver supports are typically embedded in access points and routers, and a typical setup with a DSA switch looks something like this: +-----------+ +-----------+ | | RGMII | | | +-------+ +------ 1000baseT MDI ("WAN") | | | 6-port +------ 1000baseT MDI ("LAN1") | CPU | | ethernet +------ 1000baseT MDI ("LAN2") | |MIImgmt| switch +------ 1000baseT MDI ("LAN3") | +-------+ w/5 PHYs +------ 1000baseT MDI ("LAN4") | | | | +-----------+ +-----------+ The switch driver presents each port on the switch as a separate network interface to Linux, polls the switch to maintain software link state of those ports, forwards MII management interface accesses to those network interfaces (e.g. as done by ethtool) to the switch, and exposes the switch's hardware statistics counters via the appropriate Linux kernel interfaces. This initial patch supports the MII management interface register layout of the Marvell 88E6123, 88E6161 and 88E6165 switch chips, and supports the "Ethertype DSA" packet tagging format. (There is no officially registered ethertype for the Ethertype DSA packet format, so we just grab a random one. The ethertype to use is programmed into the switch, and the switch driver uses the value of ETH_P_EDSA for this, so this define can be changed at any time in the future if the one we chose is allocated to another protocol or if Ethertype DSA gets its own officially registered ethertype, and everything will continue to work.) Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Tested-by: Nicolas Pitre <nico@marvell.com> Tested-by: Byron Bradley <byron.bbradley@gmail.com> Tested-by: Tim Ellis <tim.ellis@mac.com> Tested-by: Peter van Valderen <linux@ddcrew.com> Tested-by: Dirk Teurlings <dirk@upexia.nl> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-07 21:44:02 +08:00
return 0xffff;
}
static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val)
{
struct dsa_switch *ds = bus->priv;
if (ds->phys_mii_mask & (1 << addr))
return ds->ops->phy_write(ds, addr, reg, val);
net: Distributed Switch Architecture protocol support Distributed Switch Architecture is a protocol for managing hardware switch chips. It consists of a set of MII management registers and commands to configure the switch, and an ethernet header format to signal which of the ports of the switch a packet was received from or is intended to be sent to. The switches that this driver supports are typically embedded in access points and routers, and a typical setup with a DSA switch looks something like this: +-----------+ +-----------+ | | RGMII | | | +-------+ +------ 1000baseT MDI ("WAN") | | | 6-port +------ 1000baseT MDI ("LAN1") | CPU | | ethernet +------ 1000baseT MDI ("LAN2") | |MIImgmt| switch +------ 1000baseT MDI ("LAN3") | +-------+ w/5 PHYs +------ 1000baseT MDI ("LAN4") | | | | +-----------+ +-----------+ The switch driver presents each port on the switch as a separate network interface to Linux, polls the switch to maintain software link state of those ports, forwards MII management interface accesses to those network interfaces (e.g. as done by ethtool) to the switch, and exposes the switch's hardware statistics counters via the appropriate Linux kernel interfaces. This initial patch supports the MII management interface register layout of the Marvell 88E6123, 88E6161 and 88E6165 switch chips, and supports the "Ethertype DSA" packet tagging format. (There is no officially registered ethertype for the Ethertype DSA packet format, so we just grab a random one. The ethertype to use is programmed into the switch, and the switch driver uses the value of ETH_P_EDSA for this, so this define can be changed at any time in the future if the one we chose is allocated to another protocol or if Ethertype DSA gets its own officially registered ethertype, and everything will continue to work.) Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Tested-by: Nicolas Pitre <nico@marvell.com> Tested-by: Byron Bradley <byron.bbradley@gmail.com> Tested-by: Tim Ellis <tim.ellis@mac.com> Tested-by: Peter van Valderen <linux@ddcrew.com> Tested-by: Dirk Teurlings <dirk@upexia.nl> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-07 21:44:02 +08:00
return 0;
}
void dsa_slave_mii_bus_init(struct dsa_switch *ds)
{
ds->slave_mii_bus->priv = (void *)ds;
ds->slave_mii_bus->name = "dsa slave smi";
ds->slave_mii_bus->read = dsa_slave_phy_read;
ds->slave_mii_bus->write = dsa_slave_phy_write;
snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d.%d",
ds->dst->index, ds->index);
ds->slave_mii_bus->parent = ds->dev;
ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask;
net: Distributed Switch Architecture protocol support Distributed Switch Architecture is a protocol for managing hardware switch chips. It consists of a set of MII management registers and commands to configure the switch, and an ethernet header format to signal which of the ports of the switch a packet was received from or is intended to be sent to. The switches that this driver supports are typically embedded in access points and routers, and a typical setup with a DSA switch looks something like this: +-----------+ +-----------+ | | RGMII | | | +-------+ +------ 1000baseT MDI ("WAN") | | | 6-port +------ 1000baseT MDI ("LAN1") | CPU | | ethernet +------ 1000baseT MDI ("LAN2") | |MIImgmt| switch +------ 1000baseT MDI ("LAN3") | +-------+ w/5 PHYs +------ 1000baseT MDI ("LAN4") | | | | +-----------+ +-----------+ The switch driver presents each port on the switch as a separate network interface to Linux, polls the switch to maintain software link state of those ports, forwards MII management interface accesses to those network interfaces (e.g. as done by ethtool) to the switch, and exposes the switch's hardware statistics counters via the appropriate Linux kernel interfaces. This initial patch supports the MII management interface register layout of the Marvell 88E6123, 88E6161 and 88E6165 switch chips, and supports the "Ethertype DSA" packet tagging format. (There is no officially registered ethertype for the Ethertype DSA packet format, so we just grab a random one. The ethertype to use is programmed into the switch, and the switch driver uses the value of ETH_P_EDSA for this, so this define can be changed at any time in the future if the one we chose is allocated to another protocol or if Ethertype DSA gets its own officially registered ethertype, and everything will continue to work.) Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Tested-by: Nicolas Pitre <nico@marvell.com> Tested-by: Byron Bradley <byron.bbradley@gmail.com> Tested-by: Tim Ellis <tim.ellis@mac.com> Tested-by: Peter van Valderen <linux@ddcrew.com> Tested-by: Dirk Teurlings <dirk@upexia.nl> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-07 21:44:02 +08:00
}
/* slave device handling ****************************************************/
static int dsa_slave_get_iflink(const struct net_device *dev)
{
return dsa_slave_to_master(dev)->ifindex;
}
net: Distributed Switch Architecture protocol support Distributed Switch Architecture is a protocol for managing hardware switch chips. It consists of a set of MII management registers and commands to configure the switch, and an ethernet header format to signal which of the ports of the switch a packet was received from or is intended to be sent to. The switches that this driver supports are typically embedded in access points and routers, and a typical setup with a DSA switch looks something like this: +-----------+ +-----------+ | | RGMII | | | +-------+ +------ 1000baseT MDI ("WAN") | | | 6-port +------ 1000baseT MDI ("LAN1") | CPU | | ethernet +------ 1000baseT MDI ("LAN2") | |MIImgmt| switch +------ 1000baseT MDI ("LAN3") | +-------+ w/5 PHYs +------ 1000baseT MDI ("LAN4") | | | | +-----------+ +-----------+ The switch driver presents each port on the switch as a separate network interface to Linux, polls the switch to maintain software link state of those ports, forwards MII management interface accesses to those network interfaces (e.g. as done by ethtool) to the switch, and exposes the switch's hardware statistics counters via the appropriate Linux kernel interfaces. This initial patch supports the MII management interface register layout of the Marvell 88E6123, 88E6161 and 88E6165 switch chips, and supports the "Ethertype DSA" packet tagging format. (There is no officially registered ethertype for the Ethertype DSA packet format, so we just grab a random one. The ethertype to use is programmed into the switch, and the switch driver uses the value of ETH_P_EDSA for this, so this define can be changed at any time in the future if the one we chose is allocated to another protocol or if Ethertype DSA gets its own officially registered ethertype, and everything will continue to work.) Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Tested-by: Nicolas Pitre <nico@marvell.com> Tested-by: Byron Bradley <byron.bbradley@gmail.com> Tested-by: Tim Ellis <tim.ellis@mac.com> Tested-by: Peter van Valderen <linux@ddcrew.com> Tested-by: Dirk Teurlings <dirk@upexia.nl> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-07 21:44:02 +08:00
static int dsa_slave_open(struct net_device *dev)
{
struct net_device *master = dsa_slave_to_master(dev);
struct dsa_port *dp = dsa_slave_to_port(dev);
int err;
if (!(master->flags & IFF_UP))
return -ENETDOWN;
if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
err = dev_uc_add(master, dev->dev_addr);
if (err < 0)
goto out;
}
if (dev->flags & IFF_ALLMULTI) {
err = dev_set_allmulti(master, 1);
if (err < 0)
goto del_unicast;
}
if (dev->flags & IFF_PROMISC) {
err = dev_set_promiscuity(master, 1);
if (err < 0)
goto clear_allmulti;
}
err = dsa_port_enable(dp, dev->phydev);
if (err)
goto clear_promisc;
phylink_start(dp->pl);
net: Distributed Switch Architecture protocol support Distributed Switch Architecture is a protocol for managing hardware switch chips. It consists of a set of MII management registers and commands to configure the switch, and an ethernet header format to signal which of the ports of the switch a packet was received from or is intended to be sent to. The switches that this driver supports are typically embedded in access points and routers, and a typical setup with a DSA switch looks something like this: +-----------+ +-----------+ | | RGMII | | | +-------+ +------ 1000baseT MDI ("WAN") | | | 6-port +------ 1000baseT MDI ("LAN1") | CPU | | ethernet +------ 1000baseT MDI ("LAN2") | |MIImgmt| switch +------ 1000baseT MDI ("LAN3") | +-------+ w/5 PHYs +------ 1000baseT MDI ("LAN4") | | | | +-----------+ +-----------+ The switch driver presents each port on the switch as a separate network interface to Linux, polls the switch to maintain software link state of those ports, forwards MII management interface accesses to those network interfaces (e.g. as done by ethtool) to the switch, and exposes the switch's hardware statistics counters via the appropriate Linux kernel interfaces. This initial patch supports the MII management interface register layout of the Marvell 88E6123, 88E6161 and 88E6165 switch chips, and supports the "Ethertype DSA" packet tagging format. (There is no officially registered ethertype for the Ethertype DSA packet format, so we just grab a random one. The ethertype to use is programmed into the switch, and the switch driver uses the value of ETH_P_EDSA for this, so this define can be changed at any time in the future if the one we chose is allocated to another protocol or if Ethertype DSA gets its own officially registered ethertype, and everything will continue to work.) Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Tested-by: Nicolas Pitre <nico@marvell.com> Tested-by: Byron Bradley <byron.bbradley@gmail.com> Tested-by: Tim Ellis <tim.ellis@mac.com> Tested-by: Peter van Valderen <linux@ddcrew.com> Tested-by: Dirk Teurlings <dirk@upexia.nl> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-07 21:44:02 +08:00
return 0;
clear_promisc:
if (dev->flags & IFF_PROMISC)
dev_set_promiscuity(master, -1);
clear_allmulti:
if (dev->flags & IFF_ALLMULTI)
dev_set_allmulti(master, -1);
del_unicast:
if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
dev_uc_del(master, dev->dev_addr);
out:
return err;
net: Distributed Switch Architecture protocol support Distributed Switch Architecture is a protocol for managing hardware switch chips. It consists of a set of MII management registers and commands to configure the switch, and an ethernet header format to signal which of the ports of the switch a packet was received from or is intended to be sent to. The switches that this driver supports are typically embedded in access points and routers, and a typical setup with a DSA switch looks something like this: +-----------+ +-----------+ | | RGMII | | | +-------+ +------ 1000baseT MDI ("WAN") | | | 6-port +------ 1000baseT MDI ("LAN1") | CPU | | ethernet +------ 1000baseT MDI ("LAN2") | |MIImgmt| switch +------ 1000baseT MDI ("LAN3") | +-------+ w/5 PHYs +------ 1000baseT MDI ("LAN4") | | | | +-----------+ +-----------+ The switch driver presents each port on the switch as a separate network interface to Linux, polls the switch to maintain software link state of those ports, forwards MII management interface accesses to those network interfaces (e.g. as done by ethtool) to the switch, and exposes the switch's hardware statistics counters via the appropriate Linux kernel interfaces. This initial patch supports the MII management interface register layout of the Marvell 88E6123, 88E6161 and 88E6165 switch chips, and supports the "Ethertype DSA" packet tagging format. (There is no officially registered ethertype for the Ethertype DSA packet format, so we just grab a random one. The ethertype to use is programmed into the switch, and the switch driver uses the value of ETH_P_EDSA for this, so this define can be changed at any time in the future if the one we chose is allocated to another protocol or if Ethertype DSA gets its own officially registered ethertype, and everything will continue to work.) Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Tested-by: Nicolas Pitre <nico@marvell.com> Tested-by: Byron Bradley <byron.bbradley@gmail.com> Tested-by: Tim Ellis <tim.ellis@mac.com> Tested-by: Peter van Valderen <linux@ddcrew.com> Tested-by: Dirk Teurlings <dirk@upexia.nl> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-07 21:44:02 +08:00
}
static int dsa_slave_close(struct net_device *dev)
{
struct net_device *master = dsa_slave_to_master(dev);
struct dsa_port *dp = dsa_slave_to_port(dev);
net: dsa: Add support for deferred xmit Some hardware needs to take work to get convinced to receive frames on the CPU port (such as the sja1105 which takes temporary L2 forwarding rules over SPI that last for a single frame). Such work needs a sleepable context, and because the regular .ndo_start_xmit is atomic, this cannot be done in the tagger. So introduce a generic DSA mechanism that sets up a transmit skb queue and a workqueue for deferred transmission. The new driver callback (.port_deferred_xmit) is in dsa_switch and not in the tagger because the operations that require sleeping typically also involve interacting with the hardware, and not simply skb manipulations. Therefore having it there simplifies the structure a bit and makes it unnecessary to export functions from the driver to the tagger. The driver is responsible of calling dsa_enqueue_skb which transfers it to the master netdevice. This is so that it has a chance of performing some more work afterwards, such as cleanup or TX timestamping. To tell DSA that skb xmit deferral is required, I have thought about changing the return type of the tagger .xmit from struct sk_buff * into a enum dsa_tx_t that could potentially encode a DSA_XMIT_DEFER value. But the trailer tagger is reallocating every skb on xmit and therefore making a valid use of the pointer return value. So instead of reworking the API in complicated ways, right now a boolean property in the newly introduced DSA_SKB_CB is set. Signed-off-by: Vladimir Oltean <olteanv@gmail.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-05-05 18:19:25 +08:00
cancel_work_sync(&dp->xmit_work);
skb_queue_purge(&dp->xmit_queue);
phylink_stop(dp->pl);
dsa_port_disable(dp);
dev_mc_unsync(master, dev);
dev_uc_unsync(master, dev);
if (dev->flags & IFF_ALLMULTI)
dev_set_allmulti(master, -1);
if (dev->flags & IFF_PROMISC)
dev_set_promiscuity(master, -1);
if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
dev_uc_del(master, dev->dev_addr);
net: Distributed Switch Architecture protocol support Distributed Switch Architecture is a protocol for managing hardware switch chips. It consists of a set of MII management registers and commands to configure the switch, and an ethernet header format to signal which of the ports of the switch a packet was received from or is intended to be sent to. The switches that this driver supports are typically embedded in access points and routers, and a typical setup with a DSA switch looks something like this: +-----------+ +-----------+ | | RGMII | | | +-------+ +------ 1000baseT MDI ("WAN") | | | 6-port +------ 1000baseT MDI ("LAN1") | CPU | | ethernet +------ 1000baseT MDI ("LAN2") | |MIImgmt| switch +------ 1000baseT MDI ("LAN3") | +-------+ w/5 PHYs +------ 1000baseT MDI ("LAN4") | | | | +-----------+ +-----------+ The switch driver presents each port on the switch as a separate network interface to Linux, polls the switch to maintain software link state of those ports, forwards MII management interface accesses to those network interfaces (e.g. as done by ethtool) to the switch, and exposes the switch's hardware statistics counters via the appropriate Linux kernel interfaces. This initial patch supports the MII management interface register layout of the Marvell 88E6123, 88E6161 and 88E6165 switch chips, and supports the "Ethertype DSA" packet tagging format. (There is no officially registered ethertype for the Ethertype DSA packet format, so we just grab a random one. The ethertype to use is programmed into the switch, and the switch driver uses the value of ETH_P_EDSA for this, so this define can be changed at any time in the future if the one we chose is allocated to another protocol or if Ethertype DSA gets its own officially registered ethertype, and everything will continue to work.) Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Tested-by: Nicolas Pitre <nico@marvell.com> Tested-by: Byron Bradley <byron.bbradley@gmail.com> Tested-by: Tim Ellis <tim.ellis@mac.com> Tested-by: Peter van Valderen <linux@ddcrew.com> Tested-by: Dirk Teurlings <dirk@upexia.nl> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-07 21:44:02 +08:00
return 0;
}
static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
{
struct net_device *master = dsa_slave_to_master(dev);
if (dev->flags & IFF_UP) {
if (change & IFF_ALLMULTI)
dev_set_allmulti(master,
dev->flags & IFF_ALLMULTI ? 1 : -1);
if (change & IFF_PROMISC)
dev_set_promiscuity(master,
dev->flags & IFF_PROMISC ? 1 : -1);
}
net: Distributed Switch Architecture protocol support Distributed Switch Architecture is a protocol for managing hardware switch chips. It consists of a set of MII management registers and commands to configure the switch, and an ethernet header format to signal which of the ports of the switch a packet was received from or is intended to be sent to. The switches that this driver supports are typically embedded in access points and routers, and a typical setup with a DSA switch looks something like this: +-----------+ +-----------+ | | RGMII | | | +-------+ +------ 1000baseT MDI ("WAN") | | | 6-port +------ 1000baseT MDI ("LAN1") | CPU | | ethernet +------ 1000baseT MDI ("LAN2") | |MIImgmt| switch +------ 1000baseT MDI ("LAN3") | +-------+ w/5 PHYs +------ 1000baseT MDI ("LAN4") | | | | +-----------+ +-----------+ The switch driver presents each port on the switch as a separate network interface to Linux, polls the switch to maintain software link state of those ports, forwards MII management interface accesses to those network interfaces (e.g. as done by ethtool) to the switch, and exposes the switch's hardware statistics counters via the appropriate Linux kernel interfaces. This initial patch supports the MII management interface register layout of the Marvell 88E6123, 88E6161 and 88E6165 switch chips, and supports the "Ethertype DSA" packet tagging format. (There is no officially registered ethertype for the Ethertype DSA packet format, so we just grab a random one. The ethertype to use is programmed into the switch, and the switch driver uses the value of ETH_P_EDSA for this, so this define can be changed at any time in the future if the one we chose is allocated to another protocol or if Ethertype DSA gets its own officially registered ethertype, and everything will continue to work.) Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Tested-by: Nicolas Pitre <nico@marvell.com> Tested-by: Byron Bradley <byron.bbradley@gmail.com> Tested-by: Tim Ellis <tim.ellis@mac.com> Tested-by: Peter van Valderen <linux@ddcrew.com> Tested-by: Dirk Teurlings <dirk@upexia.nl> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-07 21:44:02 +08:00
}
static void dsa_slave_set_rx_mode(struct net_device *dev)
{
struct net_device *master = dsa_slave_to_master(dev);
net: Distributed Switch Architecture protocol support Distributed Switch Architecture is a protocol for managing hardware switch chips. It consists of a set of MII management registers and commands to configure the switch, and an ethernet header format to signal which of the ports of the switch a packet was received from or is intended to be sent to. The switches that this driver supports are typically embedded in access points and routers, and a typical setup with a DSA switch looks something like this: +-----------+ +-----------+ | | RGMII | | | +-------+ +------ 1000baseT MDI ("WAN") | | | 6-port +------ 1000baseT MDI ("LAN1") | CPU | | ethernet +------ 1000baseT MDI ("LAN2") | |MIImgmt| switch +------ 1000baseT MDI ("LAN3") | +-------+ w/5 PHYs +------ 1000baseT MDI ("LAN4") | | | | +-----------+ +-----------+ The switch driver presents each port on the switch as a separate network interface to Linux, polls the switch to maintain software link state of those ports, forwards MII management interface accesses to those network interfaces (e.g. as done by ethtool) to the switch, and exposes the switch's hardware statistics counters via the appropriate Linux kernel interfaces. This initial patch supports the MII management interface register layout of the Marvell 88E6123, 88E6161 and 88E6165 switch chips, and supports the "Ethertype DSA" packet tagging format. (There is no officially registered ethertype for the Ethertype DSA packet format, so we just grab a random one. The ethertype to use is programmed into the switch, and the switch driver uses the value of ETH_P_EDSA for this, so this define can be changed at any time in the future if the one we chose is allocated to another protocol or if Ethertype DSA gets its own officially registered ethertype, and everything will continue to work.) Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Tested-by: Nicolas Pitre <nico@marvell.com> Tested-by: Byron Bradley <byron.bbradley@gmail.com> Tested-by: Tim Ellis <tim.ellis@mac.com> Tested-by: Peter van Valderen <linux@ddcrew.com> Tested-by: Dirk Teurlings <dirk@upexia.nl> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-07 21:44:02 +08:00
dev_mc_sync(master, dev);
dev_uc_sync(master, dev);
net: Distributed Switch Architecture protocol support Distributed Switch Architecture is a protocol for managing hardware switch chips. It consists of a set of MII management registers and commands to configure the switch, and an ethernet header format to signal which of the ports of the switch a packet was received from or is intended to be sent to. The switches that this driver supports are typically embedded in access points and routers, and a typical setup with a DSA switch looks something like this: +-----------+ +-----------+ | | RGMII | | | +-------+ +------ 1000baseT MDI ("WAN") | | | 6-port +------ 1000baseT MDI ("LAN1") | CPU | | ethernet +------ 1000baseT MDI ("LAN2") | |MIImgmt| switch +------ 1000baseT MDI ("LAN3") | +-------+ w/5 PHYs +------ 1000baseT MDI ("LAN4") | | | | +-----------+ +-----------+ The switch driver presents each port on the switch as a separate network interface to Linux, polls the switch to maintain software link state of those ports, forwards MII management interface accesses to those network interfaces (e.g. as done by ethtool) to the switch, and exposes the switch's hardware statistics counters via the appropriate Linux kernel interfaces. This initial patch supports the MII management interface register layout of the Marvell 88E6123, 88E6161 and 88E6165 switch chips, and supports the "Ethertype DSA" packet tagging format. (There is no officially registered ethertype for the Ethertype DSA packet format, so we just grab a random one. The ethertype to use is programmed into the switch, and the switch driver uses the value of ETH_P_EDSA for this, so this define can be changed at any time in the future if the one we chose is allocated to another protocol or if Ethertype DSA gets its own officially registered ethertype, and everything will continue to work.) Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Tested-by: Nicolas Pitre <nico@marvell.com> Tested-by: Byron Bradley <byron.bbradley@gmail.com> Tested-by: Tim Ellis <tim.ellis@mac.com> Tested-by: Peter van Valderen <linux@ddcrew.com> Tested-by: Dirk Teurlings <dirk@upexia.nl> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-07 21:44:02 +08:00
}
static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
net: Distributed Switch Architecture protocol support Distributed Switch Architecture is a protocol for managing hardware switch chips. It consists of a set of MII management registers and commands to configure the switch, and an ethernet header format to signal which of the ports of the switch a packet was received from or is intended to be sent to. The switches that this driver supports are typically embedded in access points and routers, and a typical setup with a DSA switch looks something like this: +-----------+ +-----------+ | | RGMII | | | +-------+ +------ 1000baseT MDI ("WAN") | | | 6-port +------ 1000baseT MDI ("LAN1") | CPU | | ethernet +------ 1000baseT MDI ("LAN2") | |MIImgmt| switch +------ 1000baseT MDI ("LAN3") | +-------+ w/5 PHYs +------ 1000baseT MDI ("LAN4") | | | | +-----------+ +-----------+ The switch driver presents each port on the switch as a separate network interface to Linux, polls the switch to maintain software link state of those ports, forwards MII management interface accesses to those network interfaces (e.g. as done by ethtool) to the switch, and exposes the switch's hardware statistics counters via the appropriate Linux kernel interfaces. This initial patch supports the MII management interface register layout of the Marvell 88E6123, 88E6161 and 88E6165 switch chips, and supports the "Ethertype DSA" packet tagging format. (There is no officially registered ethertype for the Ethertype DSA packet format, so we just grab a random one. The ethertype to use is programmed into the switch, and the switch driver uses the value of ETH_P_EDSA for this, so this define can be changed at any time in the future if the one we chose is allocated to another protocol or if Ethertype DSA gets its own officially registered ethertype, and everything will continue to work.) Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Tested-by: Nicolas Pitre <nico@marvell.com> Tested-by: Byron Bradley <byron.bbradley@gmail.com> Tested-by: Tim Ellis <tim.ellis@mac.com> Tested-by: Peter van Valderen <linux@ddcrew.com> Tested-by: Dirk Teurlings <dirk@upexia.nl> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-07 21:44:02 +08:00
{
struct net_device *master = dsa_slave_to_master(dev);
struct sockaddr *addr = a;
int err;
if (!is_valid_ether_addr(addr->sa_data))
return -EADDRNOTAVAIL;
if (!(dev->flags & IFF_UP))
goto out;
if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
err = dev_uc_add(master, addr->sa_data);
if (err < 0)
return err;
}
if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
dev_uc_del(master, dev->dev_addr);
out:
ether_addr_copy(dev->dev_addr, addr->sa_data);
net: Distributed Switch Architecture protocol support Distributed Switch Architecture is a protocol for managing hardware switch chips. It consists of a set of MII management registers and commands to configure the switch, and an ethernet header format to signal which of the ports of the switch a packet was received from or is intended to be sent to. The switches that this driver supports are typically embedded in access points and routers, and a typical setup with a DSA switch looks something like this: +-----------+ +-----------+ | | RGMII | | | +-------+ +------ 1000baseT MDI ("WAN") | | | 6-port +------ 1000baseT MDI ("LAN1") | CPU | | ethernet +------ 1000baseT MDI ("LAN2") | |MIImgmt| switch +------ 1000baseT MDI ("LAN3") | +-------+ w/5 PHYs +------ 1000baseT MDI ("LAN4") | | | | +-----------+ +-----------+ The switch driver presents each port on the switch as a separate network interface to Linux, polls the switch to maintain software link state of those ports, forwards MII management interface accesses to those network interfaces (e.g. as done by ethtool) to the switch, and exposes the switch's hardware statistics counters via the appropriate Linux kernel interfaces. This initial patch supports the MII management interface register layout of the Marvell 88E6123, 88E6161 and 88E6165 switch chips, and supports the "Ethertype DSA" packet tagging format. (There is no officially registered ethertype for the Ethertype DSA packet format, so we just grab a random one. The ethertype to use is programmed into the switch, and the switch driver uses the value of ETH_P_EDSA for this, so this define can be changed at any time in the future if the one we chose is allocated to another protocol or if Ethertype DSA gets its own officially registered ethertype, and everything will continue to work.) Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Tested-by: Nicolas Pitre <nico@marvell.com> Tested-by: Byron Bradley <byron.bbradley@gmail.com> Tested-by: Tim Ellis <tim.ellis@mac.com> Tested-by: Peter van Valderen <linux@ddcrew.com> Tested-by: Dirk Teurlings <dirk@upexia.nl> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-07 21:44:02 +08:00
return 0;
}
struct dsa_slave_dump_ctx {
struct net_device *dev;
struct sk_buff *skb;
struct netlink_callback *cb;
int idx;
};
static int
dsa_slave_port_fdb_do_dump(const unsigned char *addr, u16 vid,
bool is_static, void *data)
{
struct dsa_slave_dump_ctx *dump = data;
u32 portid = NETLINK_CB(dump->cb->skb).portid;
u32 seq = dump->cb->nlh->nlmsg_seq;
struct nlmsghdr *nlh;
struct ndmsg *ndm;
if (dump->idx < dump->cb->args[2])
goto skip;
nlh = nlmsg_put(dump->skb, portid, seq, RTM_NEWNEIGH,
sizeof(*ndm), NLM_F_MULTI);
if (!nlh)
return -EMSGSIZE;
ndm = nlmsg_data(nlh);
ndm->ndm_family = AF_BRIDGE;
ndm->ndm_pad1 = 0;
ndm->ndm_pad2 = 0;
ndm->ndm_flags = NTF_SELF;
ndm->ndm_type = 0;
ndm->ndm_ifindex = dump->dev->ifindex;
ndm->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE;
if (nla_put(dump->skb, NDA_LLADDR, ETH_ALEN, addr))
goto nla_put_failure;
if (vid && nla_put_u16(dump->skb, NDA_VLAN, vid))
goto nla_put_failure;
nlmsg_end(dump->skb, nlh);
skip:
dump->idx++;
return 0;
nla_put_failure:
nlmsg_cancel(dump->skb, nlh);
return -EMSGSIZE;
}
static int
dsa_slave_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
struct net_device *dev, struct net_device *filter_dev,
int *idx)
{
struct dsa_port *dp = dsa_slave_to_port(dev);
struct dsa_slave_dump_ctx dump = {
.dev = dev,
.skb = skb,
.cb = cb,
.idx = *idx,
};
int err;
err = dsa_port_fdb_dump(dp, dsa_slave_port_fdb_do_dump, &dump);
*idx = dump.idx;
return err;
}
net: Distributed Switch Architecture protocol support Distributed Switch Architecture is a protocol for managing hardware switch chips. It consists of a set of MII management registers and commands to configure the switch, and an ethernet header format to signal which of the ports of the switch a packet was received from or is intended to be sent to. The switches that this driver supports are typically embedded in access points and routers, and a typical setup with a DSA switch looks something like this: +-----------+ +-----------+ | | RGMII | | | +-------+ +------ 1000baseT MDI ("WAN") | | | 6-port +------ 1000baseT MDI ("LAN1") | CPU | | ethernet +------ 1000baseT MDI ("LAN2") | |MIImgmt| switch +------ 1000baseT MDI ("LAN3") | +-------+ w/5 PHYs +------ 1000baseT MDI ("LAN4") | | | | +-----------+ +-----------+ The switch driver presents each port on the switch as a separate network interface to Linux, polls the switch to maintain software link state of those ports, forwards MII management interface accesses to those network interfaces (e.g. as done by ethtool) to the switch, and exposes the switch's hardware statistics counters via the appropriate Linux kernel interfaces. This initial patch supports the MII management interface register layout of the Marvell 88E6123, 88E6161 and 88E6165 switch chips, and supports the "Ethertype DSA" packet tagging format. (There is no officially registered ethertype for the Ethertype DSA packet format, so we just grab a random one. The ethertype to use is programmed into the switch, and the switch driver uses the value of ETH_P_EDSA for this, so this define can be changed at any time in the future if the one we chose is allocated to another protocol or if Ethertype DSA gets its own officially registered ethertype, and everything will continue to work.) Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Tested-by: Nicolas Pitre <nico@marvell.com> Tested-by: Byron Bradley <byron.bbradley@gmail.com> Tested-by: Tim Ellis <tim.ellis@mac.com> Tested-by: Peter van Valderen <linux@ddcrew.com> Tested-by: Dirk Teurlings <dirk@upexia.nl> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-07 21:44:02 +08:00
static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
struct dsa_slave_priv *p = netdev_priv(dev);
struct dsa_switch *ds = p->dp->ds;
int port = p->dp->index;
/* Pass through to switch driver if it supports timestamping */
switch (cmd) {
case SIOCGHWTSTAMP:
if (ds->ops->port_hwtstamp_get)
return ds->ops->port_hwtstamp_get(ds, port, ifr);
break;
case SIOCSHWTSTAMP:
if (ds->ops->port_hwtstamp_set)
return ds->ops->port_hwtstamp_set(ds, port, ifr);
break;
}
return phylink_mii_ioctl(p->dp->pl, ifr, cmd);
net: Distributed Switch Architecture protocol support Distributed Switch Architecture is a protocol for managing hardware switch chips. It consists of a set of MII management registers and commands to configure the switch, and an ethernet header format to signal which of the ports of the switch a packet was received from or is intended to be sent to. The switches that this driver supports are typically embedded in access points and routers, and a typical setup with a DSA switch looks something like this: +-----------+ +-----------+ | | RGMII | | | +-------+ +------ 1000baseT MDI ("WAN") | | | 6-port +------ 1000baseT MDI ("LAN1") | CPU | | ethernet +------ 1000baseT MDI ("LAN2") | |MIImgmt| switch +------ 1000baseT MDI ("LAN3") | +-------+ w/5 PHYs +------ 1000baseT MDI ("LAN4") | | | | +-----------+ +-----------+ The switch driver presents each port on the switch as a separate network interface to Linux, polls the switch to maintain software link state of those ports, forwards MII management interface accesses to those network interfaces (e.g. as done by ethtool) to the switch, and exposes the switch's hardware statistics counters via the appropriate Linux kernel interfaces. This initial patch supports the MII management interface register layout of the Marvell 88E6123, 88E6161 and 88E6165 switch chips, and supports the "Ethertype DSA" packet tagging format. (There is no officially registered ethertype for the Ethertype DSA packet format, so we just grab a random one. The ethertype to use is programmed into the switch, and the switch driver uses the value of ETH_P_EDSA for this, so this define can be changed at any time in the future if the one we chose is allocated to another protocol or if Ethertype DSA gets its own officially registered ethertype, and everything will continue to work.) Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Tested-by: Nicolas Pitre <nico@marvell.com> Tested-by: Byron Bradley <byron.bbradley@gmail.com> Tested-by: Tim Ellis <tim.ellis@mac.com> Tested-by: Peter van Valderen <linux@ddcrew.com> Tested-by: Dirk Teurlings <dirk@upexia.nl> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-07 21:44:02 +08:00
}
static int dsa_slave_port_attr_set(struct net_device *dev,
const struct switchdev_attr *attr,
struct switchdev_trans *trans)
{
struct dsa_port *dp = dsa_slave_to_port(dev);
int ret;
switch (attr->id) {
case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
ret = dsa_port_set_state(dp, attr->u.stp_state, trans);
break;
case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
ret = dsa_port_vlan_filtering(dp, attr->u.vlan_filtering,
trans);
break;
case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
ret = dsa_port_ageing_time(dp, attr->u.ageing_time, trans);
break;
case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
ret = dsa_port_pre_bridge_flags(dp, attr->u.brport_flags,
trans);
break;
case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
ret = dsa_port_bridge_flags(dp, attr->u.brport_flags, trans);
break;
default:
ret = -EOPNOTSUPP;
break;
}
return ret;
}
static int dsa_slave_port_obj_add(struct net_device *dev,
const struct switchdev_obj *obj,
struct switchdev_trans *trans,
struct netlink_ext_ack *extack)
{
struct dsa_port *dp = dsa_slave_to_port(dev);
int err;
/* For the prepare phase, ensure the full set of changes is feasable in
* one go in order to signal a failure properly. If an operation is not
* supported, return -EOPNOTSUPP.
*/
switch (obj->id) {
case SWITCHDEV_OBJ_ID_PORT_MDB:
if (obj->orig_dev != dev)
return -EOPNOTSUPP;
err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj), trans);
break;
case SWITCHDEV_OBJ_ID_HOST_MDB:
/* DSA can directly translate this to a normal MDB add,
* but on the CPU port.
*/
err = dsa_port_mdb_add(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj),
trans);
break;
case SWITCHDEV_OBJ_ID_PORT_VLAN:
if (obj->orig_dev != dev)
return -EOPNOTSUPP;
err = dsa_port_vlan_add(dp, SWITCHDEV_OBJ_PORT_VLAN(obj),
trans);
break;
default:
err = -EOPNOTSUPP;
break;
}
return err;
}
static int dsa_slave_port_obj_del(struct net_device *dev,
const struct switchdev_obj *obj)
{
struct dsa_port *dp = dsa_slave_to_port(dev);
int err;
switch (obj->id) {
case SWITCHDEV_OBJ_ID_PORT_MDB:
if (obj->orig_dev != dev)
return -EOPNOTSUPP;
err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
break;
case SWITCHDEV_OBJ_ID_HOST_MDB:
/* DSA can directly translate this to a normal MDB add,
* but on the CPU port.
*/
err = dsa_port_mdb_del(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj));
break;
case SWITCHDEV_OBJ_ID_PORT_VLAN:
if (obj->orig_dev != dev)
return -EOPNOTSUPP;
err = dsa_port_vlan_del(dp, SWITCHDEV_OBJ_PORT_VLAN(obj));
break;
default:
err = -EOPNOTSUPP;
break;
}
return err;
}
static int dsa_slave_get_port_parent_id(struct net_device *dev,
struct netdev_phys_item_id *ppid)
{
struct dsa_port *dp = dsa_slave_to_port(dev);
struct dsa_switch *ds = dp->ds;
struct dsa_switch_tree *dst = ds->dst;
/* For non-legacy ports, devlink is used and it takes
* care of the name generation. This ndo implementation
* should be removed with legacy support.
*/
if (dp->ds->devlink)
return -EOPNOTSUPP;
ppid->id_len = sizeof(dst->index);
memcpy(&ppid->id, &dst->index, ppid->id_len);
return 0;
}
static inline netdev_tx_t dsa_slave_netpoll_send_skb(struct net_device *dev,
struct sk_buff *skb)
{
#ifdef CONFIG_NET_POLL_CONTROLLER
struct dsa_slave_priv *p = netdev_priv(dev);
if (p->netpoll)
netpoll_send_skb(p->netpoll, skb);
#else
BUG();
#endif
return NETDEV_TX_OK;
}
static void dsa_skb_tx_timestamp(struct dsa_slave_priv *p,
struct sk_buff *skb)
{
struct dsa_switch *ds = p->dp->ds;
struct sk_buff *clone;
unsigned int type;
type = ptp_classify_raw(skb);
if (type == PTP_CLASS_NONE)
return;
if (!ds->ops->port_txtstamp)
return;
clone = skb_clone_sk(skb);
if (!clone)
return;
DSA_SKB_CB(skb)->clone = clone;
if (ds->ops->port_txtstamp(ds, p->dp->index, clone, type))
return;
kfree_skb(clone);
}
net: dsa: Add support for deferred xmit Some hardware needs to take work to get convinced to receive frames on the CPU port (such as the sja1105 which takes temporary L2 forwarding rules over SPI that last for a single frame). Such work needs a sleepable context, and because the regular .ndo_start_xmit is atomic, this cannot be done in the tagger. So introduce a generic DSA mechanism that sets up a transmit skb queue and a workqueue for deferred transmission. The new driver callback (.port_deferred_xmit) is in dsa_switch and not in the tagger because the operations that require sleeping typically also involve interacting with the hardware, and not simply skb manipulations. Therefore having it there simplifies the structure a bit and makes it unnecessary to export functions from the driver to the tagger. The driver is responsible of calling dsa_enqueue_skb which transfers it to the master netdevice. This is so that it has a chance of performing some more work afterwards, such as cleanup or TX timestamping. To tell DSA that skb xmit deferral is required, I have thought about changing the return type of the tagger .xmit from struct sk_buff * into a enum dsa_tx_t that could potentially encode a DSA_XMIT_DEFER value. But the trailer tagger is reallocating every skb on xmit and therefore making a valid use of the pointer return value. So instead of reworking the API in complicated ways, right now a boolean property in the newly introduced DSA_SKB_CB is set. Signed-off-by: Vladimir Oltean <olteanv@gmail.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-05-05 18:19:25 +08:00
netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev)
{
/* SKB for netpoll still need to be mangled with the protocol-specific
* tag to be successfully transmitted
*/
if (unlikely(netpoll_tx_running(dev)))
return dsa_slave_netpoll_send_skb(dev, skb);
/* Queue the SKB for transmission on the parent interface, but
* do not modify its EtherType
*/
skb->dev = dsa_slave_to_master(dev);
dev_queue_xmit(skb);
return NETDEV_TX_OK;
}
EXPORT_SYMBOL_GPL(dsa_enqueue_skb);
static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct dsa_slave_priv *p = netdev_priv(dev);
struct pcpu_sw_netstats *s;
struct sk_buff *nskb;
s = this_cpu_ptr(p->stats64);
u64_stats_update_begin(&s->syncp);
s->tx_packets++;
s->tx_bytes += skb->len;
u64_stats_update_end(&s->syncp);
DSA_SKB_CB(skb)->deferred_xmit = false;
DSA_SKB_CB(skb)->clone = NULL;
/* Identify PTP protocol packets, clone them, and pass them to the
* switch driver
*/
dsa_skb_tx_timestamp(p, skb);
/* Transmit function may have to reallocate the original SKB,
* in which case it must have freed it. Only free it here on error.
*/
nskb = p->xmit(skb, dev);
if (!nskb) {
net: dsa: Add support for deferred xmit Some hardware needs to take work to get convinced to receive frames on the CPU port (such as the sja1105 which takes temporary L2 forwarding rules over SPI that last for a single frame). Such work needs a sleepable context, and because the regular .ndo_start_xmit is atomic, this cannot be done in the tagger. So introduce a generic DSA mechanism that sets up a transmit skb queue and a workqueue for deferred transmission. The new driver callback (.port_deferred_xmit) is in dsa_switch and not in the tagger because the operations that require sleeping typically also involve interacting with the hardware, and not simply skb manipulations. Therefore having it there simplifies the structure a bit and makes it unnecessary to export functions from the driver to the tagger. The driver is responsible of calling dsa_enqueue_skb which transfers it to the master netdevice. This is so that it has a chance of performing some more work afterwards, such as cleanup or TX timestamping. To tell DSA that skb xmit deferral is required, I have thought about changing the return type of the tagger .xmit from struct sk_buff * into a enum dsa_tx_t that could potentially encode a DSA_XMIT_DEFER value. But the trailer tagger is reallocating every skb on xmit and therefore making a valid use of the pointer return value. So instead of reworking the API in complicated ways, right now a boolean property in the newly introduced DSA_SKB_CB is set. Signed-off-by: Vladimir Oltean <olteanv@gmail.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-05-05 18:19:25 +08:00
if (!DSA_SKB_CB(skb)->deferred_xmit)
kfree_skb(skb);
return NETDEV_TX_OK;
}
net: dsa: Add support for deferred xmit Some hardware needs to take work to get convinced to receive frames on the CPU port (such as the sja1105 which takes temporary L2 forwarding rules over SPI that last for a single frame). Such work needs a sleepable context, and because the regular .ndo_start_xmit is atomic, this cannot be done in the tagger. So introduce a generic DSA mechanism that sets up a transmit skb queue and a workqueue for deferred transmission. The new driver callback (.port_deferred_xmit) is in dsa_switch and not in the tagger because the operations that require sleeping typically also involve interacting with the hardware, and not simply skb manipulations. Therefore having it there simplifies the structure a bit and makes it unnecessary to export functions from the driver to the tagger. The driver is responsible of calling dsa_enqueue_skb which transfers it to the master netdevice. This is so that it has a chance of performing some more work afterwards, such as cleanup or TX timestamping. To tell DSA that skb xmit deferral is required, I have thought about changing the return type of the tagger .xmit from struct sk_buff * into a enum dsa_tx_t that could potentially encode a DSA_XMIT_DEFER value. But the trailer tagger is reallocating every skb on xmit and therefore making a valid use of the pointer return value. So instead of reworking the API in complicated ways, right now a boolean property in the newly introduced DSA_SKB_CB is set. Signed-off-by: Vladimir Oltean <olteanv@gmail.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-05-05 18:19:25 +08:00
return dsa_enqueue_skb(nskb, dev);
}
net: dsa: Add support for deferred xmit Some hardware needs to take work to get convinced to receive frames on the CPU port (such as the sja1105 which takes temporary L2 forwarding rules over SPI that last for a single frame). Such work needs a sleepable context, and because the regular .ndo_start_xmit is atomic, this cannot be done in the tagger. So introduce a generic DSA mechanism that sets up a transmit skb queue and a workqueue for deferred transmission. The new driver callback (.port_deferred_xmit) is in dsa_switch and not in the tagger because the operations that require sleeping typically also involve interacting with the hardware, and not simply skb manipulations. Therefore having it there simplifies the structure a bit and makes it unnecessary to export functions from the driver to the tagger. The driver is responsible of calling dsa_enqueue_skb which transfers it to the master netdevice. This is so that it has a chance of performing some more work afterwards, such as cleanup or TX timestamping. To tell DSA that skb xmit deferral is required, I have thought about changing the return type of the tagger .xmit from struct sk_buff * into a enum dsa_tx_t that could potentially encode a DSA_XMIT_DEFER value. But the trailer tagger is reallocating every skb on xmit and therefore making a valid use of the pointer return value. So instead of reworking the API in complicated ways, right now a boolean property in the newly introduced DSA_SKB_CB is set. Signed-off-by: Vladimir Oltean <olteanv@gmail.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-05-05 18:19:25 +08:00
void *dsa_defer_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct dsa_port *dp = dsa_slave_to_port(dev);
net: dsa: Add support for deferred xmit Some hardware needs to take work to get convinced to receive frames on the CPU port (such as the sja1105 which takes temporary L2 forwarding rules over SPI that last for a single frame). Such work needs a sleepable context, and because the regular .ndo_start_xmit is atomic, this cannot be done in the tagger. So introduce a generic DSA mechanism that sets up a transmit skb queue and a workqueue for deferred transmission. The new driver callback (.port_deferred_xmit) is in dsa_switch and not in the tagger because the operations that require sleeping typically also involve interacting with the hardware, and not simply skb manipulations. Therefore having it there simplifies the structure a bit and makes it unnecessary to export functions from the driver to the tagger. The driver is responsible of calling dsa_enqueue_skb which transfers it to the master netdevice. This is so that it has a chance of performing some more work afterwards, such as cleanup or TX timestamping. To tell DSA that skb xmit deferral is required, I have thought about changing the return type of the tagger .xmit from struct sk_buff * into a enum dsa_tx_t that could potentially encode a DSA_XMIT_DEFER value. But the trailer tagger is reallocating every skb on xmit and therefore making a valid use of the pointer return value. So instead of reworking the API in complicated ways, right now a boolean property in the newly introduced DSA_SKB_CB is set. Signed-off-by: Vladimir Oltean <olteanv@gmail.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-05-05 18:19:25 +08:00
DSA_SKB_CB(skb)->deferred_xmit = true;
skb_queue_tail(&dp->xmit_queue, skb);
schedule_work(&dp->xmit_work);
return NULL;
}
EXPORT_SYMBOL_GPL(dsa_defer_xmit);
static void dsa_port_xmit_work(struct work_struct *work)
{
struct dsa_port *dp = container_of(work, struct dsa_port, xmit_work);
struct dsa_switch *ds = dp->ds;
struct sk_buff *skb;
if (unlikely(!ds->ops->port_deferred_xmit))
return;
while ((skb = skb_dequeue(&dp->xmit_queue)) != NULL)
ds->ops->port_deferred_xmit(ds, dp->index, skb);
}
net: Distributed Switch Architecture protocol support Distributed Switch Architecture is a protocol for managing hardware switch chips. It consists of a set of MII management registers and commands to configure the switch, and an ethernet header format to signal which of the ports of the switch a packet was received from or is intended to be sent to. The switches that this driver supports are typically embedded in access points and routers, and a typical setup with a DSA switch looks something like this: +-----------+ +-----------+ | | RGMII | | | +-------+ +------ 1000baseT MDI ("WAN") | | | 6-port +------ 1000baseT MDI ("LAN1") | CPU | | ethernet +------ 1000baseT MDI ("LAN2") | |MIImgmt| switch +------ 1000baseT MDI ("LAN3") | +-------+ w/5 PHYs +------ 1000baseT MDI ("LAN4") | | | | +-----------+ +-----------+ The switch driver presents each port on the switch as a separate network interface to Linux, polls the switch to maintain software link state of those ports, forwards MII management interface accesses to those network interfaces (e.g. as done by ethtool) to the switch, and exposes the switch's hardware statistics counters via the appropriate Linux kernel interfaces. This initial patch supports the MII management interface register layout of the Marvell 88E6123, 88E6161 and 88E6165 switch chips, and supports the "Ethertype DSA" packet tagging format. (There is no officially registered ethertype for the Ethertype DSA packet format, so we just grab a random one. The ethertype to use is programmed into the switch, and the switch driver uses the value of ETH_P_EDSA for this, so this define can be changed at any time in the future if the one we chose is allocated to another protocol or if Ethertype DSA gets its own officially registered ethertype, and everything will continue to work.) Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Tested-by: Nicolas Pitre <nico@marvell.com> Tested-by: Byron Bradley <byron.bbradley@gmail.com> Tested-by: Tim Ellis <tim.ellis@mac.com> Tested-by: Peter van Valderen <linux@ddcrew.com> Tested-by: Dirk Teurlings <dirk@upexia.nl> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-07 21:44:02 +08:00
/* ethtool operations *******************************************************/
static void dsa_slave_get_drvinfo(struct net_device *dev,
struct ethtool_drvinfo *drvinfo)
{
strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
net: Distributed Switch Architecture protocol support Distributed Switch Architecture is a protocol for managing hardware switch chips. It consists of a set of MII management registers and commands to configure the switch, and an ethernet header format to signal which of the ports of the switch a packet was received from or is intended to be sent to. The switches that this driver supports are typically embedded in access points and routers, and a typical setup with a DSA switch looks something like this: +-----------+ +-----------+ | | RGMII | | | +-------+ +------ 1000baseT MDI ("WAN") | | | 6-port +------ 1000baseT MDI ("LAN1") | CPU | | ethernet +------ 1000baseT MDI ("LAN2") | |MIImgmt| switch +------ 1000baseT MDI ("LAN3") | +-------+ w/5 PHYs +------ 1000baseT MDI ("LAN4") | | | | +-----------+ +-----------+ The switch driver presents each port on the switch as a separate network interface to Linux, polls the switch to maintain software link state of those ports, forwards MII management interface accesses to those network interfaces (e.g. as done by ethtool) to the switch, and exposes the switch's hardware statistics counters via the appropriate Linux kernel interfaces. This initial patch supports the MII management interface register layout of the Marvell 88E6123, 88E6161 and 88E6165 switch chips, and supports the "Ethertype DSA" packet tagging format. (There is no officially registered ethertype for the Ethertype DSA packet format, so we just grab a random one. The ethertype to use is programmed into the switch, and the switch driver uses the value of ETH_P_EDSA for this, so this define can be changed at any time in the future if the one we chose is allocated to another protocol or if Ethertype DSA gets its own officially registered ethertype, and everything will continue to work.) Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Tested-by: Nicolas Pitre <nico@marvell.com> Tested-by: Byron Bradley <byron.bbradley@gmail.com> Tested-by: Tim Ellis <tim.ellis@mac.com> Tested-by: Peter van Valderen <linux@ddcrew.com> Tested-by: Dirk Teurlings <dirk@upexia.nl> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-07 21:44:02 +08:00
}
static int dsa_slave_get_regs_len(struct net_device *dev)
{
struct dsa_port *dp = dsa_slave_to_port(dev);
struct dsa_switch *ds = dp->ds;
if (ds->ops->get_regs_len)
return ds->ops->get_regs_len(ds, dp->index);
return -EOPNOTSUPP;
}
static void
dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
{
struct dsa_port *dp = dsa_slave_to_port(dev);
struct dsa_switch *ds = dp->ds;
if (ds->ops->get_regs)
ds->ops->get_regs(ds, dp->index, regs, _p);
}
static int dsa_slave_nway_reset(struct net_device *dev)
{
struct dsa_port *dp = dsa_slave_to_port(dev);
return phylink_ethtool_nway_reset(dp->pl);
}
static int dsa_slave_get_eeprom_len(struct net_device *dev)
{
struct dsa_port *dp = dsa_slave_to_port(dev);
struct dsa_switch *ds = dp->ds;
if (ds->cd && ds->cd->eeprom_len)
return ds->cd->eeprom_len;
if (ds->ops->get_eeprom_len)
return ds->ops->get_eeprom_len(ds);
return 0;
}
static int dsa_slave_get_eeprom(struct net_device *dev,
struct ethtool_eeprom *eeprom, u8 *data)
{
struct dsa_port *dp = dsa_slave_to_port(dev);
struct dsa_switch *ds = dp->ds;
if (ds->ops->get_eeprom)
return ds->ops->get_eeprom(ds, eeprom, data);
return -EOPNOTSUPP;
}
static int dsa_slave_set_eeprom(struct net_device *dev,
struct ethtool_eeprom *eeprom, u8 *data)
{
struct dsa_port *dp = dsa_slave_to_port(dev);
struct dsa_switch *ds = dp->ds;
if (ds->ops->set_eeprom)
return ds->ops->set_eeprom(ds, eeprom, data);
return -EOPNOTSUPP;
}
net: Distributed Switch Architecture protocol support Distributed Switch Architecture is a protocol for managing hardware switch chips. It consists of a set of MII management registers and commands to configure the switch, and an ethernet header format to signal which of the ports of the switch a packet was received from or is intended to be sent to. The switches that this driver supports are typically embedded in access points and routers, and a typical setup with a DSA switch looks something like this: +-----------+ +-----------+ | | RGMII | | | +-------+ +------ 1000baseT MDI ("WAN") | | | 6-port +------ 1000baseT MDI ("LAN1") | CPU | | ethernet +------ 1000baseT MDI ("LAN2") | |MIImgmt| switch +------ 1000baseT MDI ("LAN3") | +-------+ w/5 PHYs +------ 1000baseT MDI ("LAN4") | | | | +-----------+ +-----------+ The switch driver presents each port on the switch as a separate network interface to Linux, polls the switch to maintain software link state of those ports, forwards MII management interface accesses to those network interfaces (e.g. as done by ethtool) to the switch, and exposes the switch's hardware statistics counters via the appropriate Linux kernel interfaces. This initial patch supports the MII management interface register layout of the Marvell 88E6123, 88E6161 and 88E6165 switch chips, and supports the "Ethertype DSA" packet tagging format. (There is no officially registered ethertype for the Ethertype DSA packet format, so we just grab a random one. The ethertype to use is programmed into the switch, and the switch driver uses the value of ETH_P_EDSA for this, so this define can be changed at any time in the future if the one we chose is allocated to another protocol or if Ethertype DSA gets its own officially registered ethertype, and everything will continue to work.) Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Tested-by: Nicolas Pitre <nico@marvell.com> Tested-by: Byron Bradley <byron.bbradley@gmail.com> Tested-by: Tim Ellis <tim.ellis@mac.com> Tested-by: Peter van Valderen <linux@ddcrew.com> Tested-by: Dirk Teurlings <dirk@upexia.nl> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-07 21:44:02 +08:00
static void dsa_slave_get_strings(struct net_device *dev,
uint32_t stringset, uint8_t *data)
{
struct dsa_port *dp = dsa_slave_to_port(dev);
struct dsa_switch *ds = dp->ds;
net: Distributed Switch Architecture protocol support Distributed Switch Architecture is a protocol for managing hardware switch chips. It consists of a set of MII management registers and commands to configure the switch, and an ethernet header format to signal which of the ports of the switch a packet was received from or is intended to be sent to. The switches that this driver supports are typically embedded in access points and routers, and a typical setup with a DSA switch looks something like this: +-----------+ +-----------+ | | RGMII | | | +-------+ +------ 1000baseT MDI ("WAN") | | | 6-port +------ 1000baseT MDI ("LAN1") | CPU | | ethernet +------ 1000baseT MDI ("LAN2") | |MIImgmt| switch +------ 1000baseT MDI ("LAN3") | +-------+ w/5 PHYs +------ 1000baseT MDI ("LAN4") | | | | +-----------+ +-----------+ The switch driver presents each port on the switch as a separate network interface to Linux, polls the switch to maintain software link state of those ports, forwards MII management interface accesses to those network interfaces (e.g. as done by ethtool) to the switch, and exposes the switch's hardware statistics counters via the appropriate Linux kernel interfaces. This initial patch supports the MII management interface register layout of the Marvell 88E6123, 88E6161 and 88E6165 switch chips, and supports the "Ethertype DSA" packet tagging format. (There is no officially registered ethertype for the Ethertype DSA packet format, so we just grab a random one. The ethertype to use is programmed into the switch, and the switch driver uses the value of ETH_P_EDSA for this, so this define can be changed at any time in the future if the one we chose is allocated to another protocol or if Ethertype DSA gets its own officially registered ethertype, and everything will continue to work.) Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Tested-by: Nicolas Pitre <nico@marvell.com> Tested-by: Byron Bradley <byron.bbradley@gmail.com> Tested-by: Tim Ellis <tim.ellis@mac.com> Tested-by: Peter van Valderen <linux@ddcrew.com> Tested-by: Dirk Teurlings <dirk@upexia.nl> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-07 21:44:02 +08:00
if (stringset == ETH_SS_STATS) {
int len = ETH_GSTRING_LEN;
strncpy(data, "tx_packets", len);
strncpy(data + len, "tx_bytes", len);
strncpy(data + 2 * len, "rx_packets", len);
strncpy(data + 3 * len, "rx_bytes", len);
if (ds->ops->get_strings)
ds->ops->get_strings(ds, dp->index, stringset,
data + 4 * len);
net: Distributed Switch Architecture protocol support Distributed Switch Architecture is a protocol for managing hardware switch chips. It consists of a set of MII management registers and commands to configure the switch, and an ethernet header format to signal which of the ports of the switch a packet was received from or is intended to be sent to. The switches that this driver supports are typically embedded in access points and routers, and a typical setup with a DSA switch looks something like this: +-----------+ +-----------+ | | RGMII | | | +-------+ +------ 1000baseT MDI ("WAN") | | | 6-port +------ 1000baseT MDI ("LAN1") | CPU | | ethernet +------ 1000baseT MDI ("LAN2") | |MIImgmt| switch +------ 1000baseT MDI ("LAN3") | +-------+ w/5 PHYs +------ 1000baseT MDI ("LAN4") | | | | +-----------+ +-----------+ The switch driver presents each port on the switch as a separate network interface to Linux, polls the switch to maintain software link state of those ports, forwards MII management interface accesses to those network interfaces (e.g. as done by ethtool) to the switch, and exposes the switch's hardware statistics counters via the appropriate Linux kernel interfaces. This initial patch supports the MII management interface register layout of the Marvell 88E6123, 88E6161 and 88E6165 switch chips, and supports the "Ethertype DSA" packet tagging format. (There is no officially registered ethertype for the Ethertype DSA packet format, so we just grab a random one. The ethertype to use is programmed into the switch, and the switch driver uses the value of ETH_P_EDSA for this, so this define can be changed at any time in the future if the one we chose is allocated to another protocol or if Ethertype DSA gets its own officially registered ethertype, and everything will continue to work.) Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Tested-by: Nicolas Pitre <nico@marvell.com> Tested-by: Byron Bradley <byron.bbradley@gmail.com> Tested-by: Tim Ellis <tim.ellis@mac.com> Tested-by: Peter van Valderen <linux@ddcrew.com> Tested-by: Dirk Teurlings <dirk@upexia.nl> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-07 21:44:02 +08:00
}
}
static void dsa_slave_get_ethtool_stats(struct net_device *dev,
struct ethtool_stats *stats,
uint64_t *data)
{
struct dsa_port *dp = dsa_slave_to_port(dev);
net: Distributed Switch Architecture protocol support Distributed Switch Architecture is a protocol for managing hardware switch chips. It consists of a set of MII management registers and commands to configure the switch, and an ethernet header format to signal which of the ports of the switch a packet was received from or is intended to be sent to. The switches that this driver supports are typically embedded in access points and routers, and a typical setup with a DSA switch looks something like this: +-----------+ +-----------+ | | RGMII | | | +-------+ +------ 1000baseT MDI ("WAN") | | | 6-port +------ 1000baseT MDI ("LAN1") | CPU | | ethernet +------ 1000baseT MDI ("LAN2") | |MIImgmt| switch +------ 1000baseT MDI ("LAN3") | +-------+ w/5 PHYs +------ 1000baseT MDI ("LAN4") | | | | +-----------+ +-----------+ The switch driver presents each port on the switch as a separate network interface to Linux, polls the switch to maintain software link state of those ports, forwards MII management interface accesses to those network interfaces (e.g. as done by ethtool) to the switch, and exposes the switch's hardware statistics counters via the appropriate Linux kernel interfaces. This initial patch supports the MII management interface register layout of the Marvell 88E6123, 88E6161 and 88E6165 switch chips, and supports the "Ethertype DSA" packet tagging format. (There is no officially registered ethertype for the Ethertype DSA packet format, so we just grab a random one. The ethertype to use is programmed into the switch, and the switch driver uses the value of ETH_P_EDSA for this, so this define can be changed at any time in the future if the one we chose is allocated to another protocol or if Ethertype DSA gets its own officially registered ethertype, and everything will continue to work.) Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Tested-by: Nicolas Pitre <nico@marvell.com> Tested-by: Byron Bradley <byron.bbradley@gmail.com> Tested-by: Tim Ellis <tim.ellis@mac.com> Tested-by: Peter van Valderen <linux@ddcrew.com> Tested-by: Dirk Teurlings <dirk@upexia.nl> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-07 21:44:02 +08:00
struct dsa_slave_priv *p = netdev_priv(dev);
struct dsa_switch *ds = dp->ds;
struct pcpu_sw_netstats *s;
unsigned int start;
int i;
for_each_possible_cpu(i) {
u64 tx_packets, tx_bytes, rx_packets, rx_bytes;
s = per_cpu_ptr(p->stats64, i);
do {
start = u64_stats_fetch_begin_irq(&s->syncp);
tx_packets = s->tx_packets;
tx_bytes = s->tx_bytes;
rx_packets = s->rx_packets;
rx_bytes = s->rx_bytes;
} while (u64_stats_fetch_retry_irq(&s->syncp, start));
data[0] += tx_packets;
data[1] += tx_bytes;
data[2] += rx_packets;
data[3] += rx_bytes;
}
if (ds->ops->get_ethtool_stats)
ds->ops->get_ethtool_stats(ds, dp->index, data + 4);
net: Distributed Switch Architecture protocol support Distributed Switch Architecture is a protocol for managing hardware switch chips. It consists of a set of MII management registers and commands to configure the switch, and an ethernet header format to signal which of the ports of the switch a packet was received from or is intended to be sent to. The switches that this driver supports are typically embedded in access points and routers, and a typical setup with a DSA switch looks something like this: +-----------+ +-----------+ | | RGMII | | | +-------+ +------ 1000baseT MDI ("WAN") | | | 6-port +------ 1000baseT MDI ("LAN1") | CPU | | ethernet +------ 1000baseT MDI ("LAN2") | |MIImgmt| switch +------ 1000baseT MDI ("LAN3") | +-------+ w/5 PHYs +------ 1000baseT MDI ("LAN4") | | | | +-----------+ +-----------+ The switch driver presents each port on the switch as a separate network interface to Linux, polls the switch to maintain software link state of those ports, forwards MII management interface accesses to those network interfaces (e.g. as done by ethtool) to the switch, and exposes the switch's hardware statistics counters via the appropriate Linux kernel interfaces. This initial patch supports the MII management interface register layout of the Marvell 88E6123, 88E6161 and 88E6165 switch chips, and supports the "Ethertype DSA" packet tagging format. (There is no officially registered ethertype for the Ethertype DSA packet format, so we just grab a random one. The ethertype to use is programmed into the switch, and the switch driver uses the value of ETH_P_EDSA for this, so this define can be changed at any time in the future if the one we chose is allocated to another protocol or if Ethertype DSA gets its own officially registered ethertype, and everything will continue to work.) Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Tested-by: Nicolas Pitre <nico@marvell.com> Tested-by: Byron Bradley <byron.bbradley@gmail.com> Tested-by: Tim Ellis <tim.ellis@mac.com> Tested-by: Peter van Valderen <linux@ddcrew.com> Tested-by: Dirk Teurlings <dirk@upexia.nl> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-07 21:44:02 +08:00
}
static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
{
struct dsa_port *dp = dsa_slave_to_port(dev);
struct dsa_switch *ds = dp->ds;
net: Distributed Switch Architecture protocol support Distributed Switch Architecture is a protocol for managing hardware switch chips. It consists of a set of MII management registers and commands to configure the switch, and an ethernet header format to signal which of the ports of the switch a packet was received from or is intended to be sent to. The switches that this driver supports are typically embedded in access points and routers, and a typical setup with a DSA switch looks something like this: +-----------+ +-----------+ | | RGMII | | | +-------+ +------ 1000baseT MDI ("WAN") | | | 6-port +------ 1000baseT MDI ("LAN1") | CPU | | ethernet +------ 1000baseT MDI ("LAN2") | |MIImgmt| switch +------ 1000baseT MDI ("LAN3") | +-------+ w/5 PHYs +------ 1000baseT MDI ("LAN4") | | | | +-----------+ +-----------+ The switch driver presents each port on the switch as a separate network interface to Linux, polls the switch to maintain software link state of those ports, forwards MII management interface accesses to those network interfaces (e.g. as done by ethtool) to the switch, and exposes the switch's hardware statistics counters via the appropriate Linux kernel interfaces. This initial patch supports the MII management interface register layout of the Marvell 88E6123, 88E6161 and 88E6165 switch chips, and supports the "Ethertype DSA" packet tagging format. (There is no officially registered ethertype for the Ethertype DSA packet format, so we just grab a random one. The ethertype to use is programmed into the switch, and the switch driver uses the value of ETH_P_EDSA for this, so this define can be changed at any time in the future if the one we chose is allocated to another protocol or if Ethertype DSA gets its own officially registered ethertype, and everything will continue to work.) Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Tested-by: Nicolas Pitre <nico@marvell.com> Tested-by: Byron Bradley <byron.bbradley@gmail.com> Tested-by: Tim Ellis <tim.ellis@mac.com> Tested-by: Peter van Valderen <linux@ddcrew.com> Tested-by: Dirk Teurlings <dirk@upexia.nl> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-07 21:44:02 +08:00
if (sset == ETH_SS_STATS) {
int count;
count = 4;
if (ds->ops->get_sset_count)
count += ds->ops->get_sset_count(ds, dp->index, sset);
net: Distributed Switch Architecture protocol support Distributed Switch Architecture is a protocol for managing hardware switch chips. It consists of a set of MII management registers and commands to configure the switch, and an ethernet header format to signal which of the ports of the switch a packet was received from or is intended to be sent to. The switches that this driver supports are typically embedded in access points and routers, and a typical setup with a DSA switch looks something like this: +-----------+ +-----------+ | | RGMII | | | +-------+ +------ 1000baseT MDI ("WAN") | | | 6-port +------ 1000baseT MDI ("LAN1") | CPU | | ethernet +------ 1000baseT MDI ("LAN2") | |MIImgmt| switch +------ 1000baseT MDI ("LAN3") | +-------+ w/5 PHYs +------ 1000baseT MDI ("LAN4") | | | | +-----------+ +-----------+ The switch driver presents each port on the switch as a separate network interface to Linux, polls the switch to maintain software link state of those ports, forwards MII management interface accesses to those network interfaces (e.g. as done by ethtool) to the switch, and exposes the switch's hardware statistics counters via the appropriate Linux kernel interfaces. This initial patch supports the MII management interface register layout of the Marvell 88E6123, 88E6161 and 88E6165 switch chips, and supports the "Ethertype DSA" packet tagging format. (There is no officially registered ethertype for the Ethertype DSA packet format, so we just grab a random one. The ethertype to use is programmed into the switch, and the switch driver uses the value of ETH_P_EDSA for this, so this define can be changed at any time in the future if the one we chose is allocated to another protocol or if Ethertype DSA gets its own officially registered ethertype, and everything will continue to work.) Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Tested-by: Nicolas Pitre <nico@marvell.com> Tested-by: Byron Bradley <byron.bbradley@gmail.com> Tested-by: Tim Ellis <tim.ellis@mac.com> Tested-by: Peter van Valderen <linux@ddcrew.com> Tested-by: Dirk Teurlings <dirk@upexia.nl> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-07 21:44:02 +08:00
return count;
}
return -EOPNOTSUPP;
}
static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
{
struct dsa_port *dp = dsa_slave_to_port(dev);
struct dsa_switch *ds = dp->ds;
phylink_ethtool_get_wol(dp->pl, w);
if (ds->ops->get_wol)
ds->ops->get_wol(ds, dp->index, w);
}
static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
{
struct dsa_port *dp = dsa_slave_to_port(dev);
struct dsa_switch *ds = dp->ds;
int ret = -EOPNOTSUPP;
phylink_ethtool_set_wol(dp->pl, w);
if (ds->ops->set_wol)
ret = ds->ops->set_wol(ds, dp->index, w);
return ret;
}
static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
{
struct dsa_port *dp = dsa_slave_to_port(dev);
struct dsa_switch *ds = dp->ds;
int ret;
/* Port's PHY and MAC both need to be EEE capable */
if (!dev->phydev || !dp->pl)
return -ENODEV;
if (!ds->ops->set_mac_eee)
return -EOPNOTSUPP;
ret = ds->ops->set_mac_eee(ds, dp->index, e);
if (ret)
return ret;
return phylink_ethtool_set_eee(dp->pl, e);
}
static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
{
struct dsa_port *dp = dsa_slave_to_port(dev);
struct dsa_switch *ds = dp->ds;
int ret;
/* Port's PHY and MAC both need to be EEE capable */
if (!dev->phydev || !dp->pl)
return -ENODEV;
if (!ds->ops->get_mac_eee)
return -EOPNOTSUPP;
ret = ds->ops->get_mac_eee(ds, dp->index, e);
if (ret)
return ret;
return phylink_ethtool_get_eee(dp->pl, e);
}
static int dsa_slave_get_link_ksettings(struct net_device *dev,
struct ethtool_link_ksettings *cmd)
{
struct dsa_port *dp = dsa_slave_to_port(dev);
return phylink_ethtool_ksettings_get(dp->pl, cmd);
}
static int dsa_slave_set_link_ksettings(struct net_device *dev,
const struct ethtool_link_ksettings *cmd)
{
struct dsa_port *dp = dsa_slave_to_port(dev);
return phylink_ethtool_ksettings_set(dp->pl, cmd);
}
#ifdef CONFIG_NET_POLL_CONTROLLER
static int dsa_slave_netpoll_setup(struct net_device *dev,
struct netpoll_info *ni)
{
struct net_device *master = dsa_slave_to_master(dev);
struct dsa_slave_priv *p = netdev_priv(dev);
struct netpoll *netpoll;
int err = 0;
netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
if (!netpoll)
return -ENOMEM;
err = __netpoll_setup(netpoll, master);
if (err) {
kfree(netpoll);
goto out;
}
p->netpoll = netpoll;
out:
return err;
}
static void dsa_slave_netpoll_cleanup(struct net_device *dev)
{
struct dsa_slave_priv *p = netdev_priv(dev);
struct netpoll *netpoll = p->netpoll;
if (!netpoll)
return;
p->netpoll = NULL;
__netpoll_free(netpoll);
}
static void dsa_slave_poll_controller(struct net_device *dev)
{
}
#endif
static int dsa_slave_get_phys_port_name(struct net_device *dev,
char *name, size_t len)
{
struct dsa_port *dp = dsa_slave_to_port(dev);
/* For non-legacy ports, devlink is used and it takes
* care of the name generation. This ndo implementation
* should be removed with legacy support.
*/
if (dp->ds->devlink)
return -EOPNOTSUPP;
if (snprintf(name, len, "p%d", dp->index) >= len)
return -EINVAL;
return 0;
}
static struct dsa_mall_tc_entry *
dsa_slave_mall_tc_entry_find(struct net_device *dev, unsigned long cookie)
{
struct dsa_slave_priv *p = netdev_priv(dev);
struct dsa_mall_tc_entry *mall_tc_entry;
list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list)
if (mall_tc_entry->cookie == cookie)
return mall_tc_entry;
return NULL;
}
static int dsa_slave_add_cls_matchall(struct net_device *dev,
struct tc_cls_matchall_offload *cls,
bool ingress)
{
struct dsa_port *dp = dsa_slave_to_port(dev);
struct dsa_slave_priv *p = netdev_priv(dev);
struct dsa_mall_tc_entry *mall_tc_entry;
__be16 protocol = cls->common.protocol;
struct dsa_switch *ds = dp->ds;
struct flow_action_entry *act;
struct dsa_port *to_dp;
int err = -EOPNOTSUPP;
if (!ds->ops->port_mirror_add)
return err;
if (!flow_offload_has_one_action(&cls->rule->action))
return err;
act = &cls->rule->action.entries[0];
if (act->id == FLOW_ACTION_MIRRED && protocol == htons(ETH_P_ALL)) {
struct dsa_mall_mirror_tc_entry *mirror;
if (!act->dev)
return -EINVAL;
if (!dsa_slave_dev_check(act->dev))
return -EOPNOTSUPP;
mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
if (!mall_tc_entry)
return -ENOMEM;
mall_tc_entry->cookie = cls->cookie;
mall_tc_entry->type = DSA_PORT_MALL_MIRROR;
mirror = &mall_tc_entry->mirror;
to_dp = dsa_slave_to_port(act->dev);
mirror->to_local_port = to_dp->index;
mirror->ingress = ingress;
err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress);
if (err) {
kfree(mall_tc_entry);
return err;
}
list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
}
return 0;
}
static void dsa_slave_del_cls_matchall(struct net_device *dev,
struct tc_cls_matchall_offload *cls)
{
struct dsa_port *dp = dsa_slave_to_port(dev);
struct dsa_mall_tc_entry *mall_tc_entry;
struct dsa_switch *ds = dp->ds;
if (!ds->ops->port_mirror_del)
return;
mall_tc_entry = dsa_slave_mall_tc_entry_find(dev, cls->cookie);
if (!mall_tc_entry)
return;
list_del(&mall_tc_entry->list);
switch (mall_tc_entry->type) {
case DSA_PORT_MALL_MIRROR:
ds->ops->port_mirror_del(ds, dp->index, &mall_tc_entry->mirror);
break;
default:
WARN_ON(1);
}
kfree(mall_tc_entry);
}
static int dsa_slave_setup_tc_cls_matchall(struct net_device *dev,
struct tc_cls_matchall_offload *cls,
bool ingress)
{
if (cls->common.chain_index)
return -EOPNOTSUPP;
switch (cls->command) {
case TC_CLSMATCHALL_REPLACE:
return dsa_slave_add_cls_matchall(dev, cls, ingress);
case TC_CLSMATCHALL_DESTROY:
dsa_slave_del_cls_matchall(dev, cls);
return 0;
default:
return -EOPNOTSUPP;
}
}
static int dsa_slave_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
void *cb_priv, bool ingress)
{
struct net_device *dev = cb_priv;
if (!tc_can_offload(dev))
return -EOPNOTSUPP;
switch (type) {
case TC_SETUP_CLSMATCHALL:
return dsa_slave_setup_tc_cls_matchall(dev, type_data, ingress);
default:
return -EOPNOTSUPP;
}
}
static int dsa_slave_setup_tc_block_cb_ig(enum tc_setup_type type,
void *type_data, void *cb_priv)
{
return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, true);
}
static int dsa_slave_setup_tc_block_cb_eg(enum tc_setup_type type,
void *type_data, void *cb_priv)
{
return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, false);
}
static int dsa_slave_setup_tc_block(struct net_device *dev,
struct tc_block_offload *f)
{
tc_setup_cb_t *cb;
if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
cb = dsa_slave_setup_tc_block_cb_ig;
else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS)
cb = dsa_slave_setup_tc_block_cb_eg;
else
return -EOPNOTSUPP;
switch (f->command) {
case FLOW_BLOCK_BIND:
return tcf_block_cb_register(f->block, cb, dev, dev, f->extack);
case FLOW_BLOCK_UNBIND:
tcf_block_cb_unregister(f->block, cb, dev);
return 0;
default:
return -EOPNOTSUPP;
}
}
static int dsa_slave_setup_tc(struct net_device *dev, enum tc_setup_type type,
void *type_data)
{
switch (type) {
case TC_SETUP_BLOCK:
return dsa_slave_setup_tc_block(dev, type_data);
default:
return -EOPNOTSUPP;
}
}
static void dsa_slave_get_stats64(struct net_device *dev,
struct rtnl_link_stats64 *stats)
{
struct dsa_slave_priv *p = netdev_priv(dev);
struct pcpu_sw_netstats *s;
unsigned int start;
int i;
netdev_stats_to_stats64(stats, &dev->stats);
for_each_possible_cpu(i) {
u64 tx_packets, tx_bytes, rx_packets, rx_bytes;
s = per_cpu_ptr(p->stats64, i);
do {
start = u64_stats_fetch_begin_irq(&s->syncp);
tx_packets = s->tx_packets;
tx_bytes = s->tx_bytes;
rx_packets = s->rx_packets;
rx_bytes = s->rx_bytes;
} while (u64_stats_fetch_retry_irq(&s->syncp, start));
stats->tx_packets += tx_packets;
stats->tx_bytes += tx_bytes;
stats->rx_packets += rx_packets;
stats->rx_bytes += rx_bytes;
}
}
static int dsa_slave_get_rxnfc(struct net_device *dev,
struct ethtool_rxnfc *nfc, u32 *rule_locs)
{
struct dsa_port *dp = dsa_slave_to_port(dev);
struct dsa_switch *ds = dp->ds;
if (!ds->ops->get_rxnfc)
return -EOPNOTSUPP;
return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs);
}
static int dsa_slave_set_rxnfc(struct net_device *dev,
struct ethtool_rxnfc *nfc)
{
struct dsa_port *dp = dsa_slave_to_port(dev);
struct dsa_switch *ds = dp->ds;
if (!ds->ops->set_rxnfc)
return -EOPNOTSUPP;
return ds->ops->set_rxnfc(ds, dp->index, nfc);
}
static int dsa_slave_get_ts_info(struct net_device *dev,
struct ethtool_ts_info *ts)
{
struct dsa_slave_priv *p = netdev_priv(dev);
struct dsa_switch *ds = p->dp->ds;
if (!ds->ops->get_ts_info)
return -EOPNOTSUPP;
return ds->ops->get_ts_info(ds, p->dp->index, ts);
}
static int dsa_slave_vlan_rx_add_vid(struct net_device *dev, __be16 proto,
u16 vid)
{
struct dsa_port *dp = dsa_slave_to_port(dev);
struct bridge_vlan_info info;
int ret;
/* Check for a possible bridge VLAN entry now since there is no
* need to emulate the switchdev prepare + commit phase.
*/
if (dp->bridge_dev) {
/* br_vlan_get_info() returns -EINVAL or -ENOENT if the
* device, respectively the VID is not found, returning
* 0 means success, which is a failure for us here.
*/
ret = br_vlan_get_info(dp->bridge_dev, vid, &info);
if (ret == 0)
return -EBUSY;
}
/* This API only allows programming tagged, non-PVID VIDs */
return dsa_port_vid_add(dp, vid, 0);
}
static int dsa_slave_vlan_rx_kill_vid(struct net_device *dev, __be16 proto,
u16 vid)
{
struct dsa_port *dp = dsa_slave_to_port(dev);
struct bridge_vlan_info info;
int ret;
/* Check for a possible bridge VLAN entry now since there is no
* need to emulate the switchdev prepare + commit phase.
*/
if (dp->bridge_dev) {
/* br_vlan_get_info() returns -EINVAL or -ENOENT if the
* device, respectively the VID is not found, returning
* 0 means success, which is a failure for us here.
*/
ret = br_vlan_get_info(dp->bridge_dev, vid, &info);
if (ret == 0)
return -EBUSY;
}
ret = dsa_port_vid_del(dp, vid);
if (ret == -EOPNOTSUPP)
ret = 0;
return ret;
}
net: Distributed Switch Architecture protocol support Distributed Switch Architecture is a protocol for managing hardware switch chips. It consists of a set of MII management registers and commands to configure the switch, and an ethernet header format to signal which of the ports of the switch a packet was received from or is intended to be sent to. The switches that this driver supports are typically embedded in access points and routers, and a typical setup with a DSA switch looks something like this: +-----------+ +-----------+ | | RGMII | | | +-------+ +------ 1000baseT MDI ("WAN") | | | 6-port +------ 1000baseT MDI ("LAN1") | CPU | | ethernet +------ 1000baseT MDI ("LAN2") | |MIImgmt| switch +------ 1000baseT MDI ("LAN3") | +-------+ w/5 PHYs +------ 1000baseT MDI ("LAN4") | | | | +-----------+ +-----------+ The switch driver presents each port on the switch as a separate network interface to Linux, polls the switch to maintain software link state of those ports, forwards MII management interface accesses to those network interfaces (e.g. as done by ethtool) to the switch, and exposes the switch's hardware statistics counters via the appropriate Linux kernel interfaces. This initial patch supports the MII management interface register layout of the Marvell 88E6123, 88E6161 and 88E6165 switch chips, and supports the "Ethertype DSA" packet tagging format. (There is no officially registered ethertype for the Ethertype DSA packet format, so we just grab a random one. The ethertype to use is programmed into the switch, and the switch driver uses the value of ETH_P_EDSA for this, so this define can be changed at any time in the future if the one we chose is allocated to another protocol or if Ethertype DSA gets its own officially registered ethertype, and everything will continue to work.) Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Tested-by: Nicolas Pitre <nico@marvell.com> Tested-by: Byron Bradley <byron.bbradley@gmail.com> Tested-by: Tim Ellis <tim.ellis@mac.com> Tested-by: Peter van Valderen <linux@ddcrew.com> Tested-by: Dirk Teurlings <dirk@upexia.nl> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-07 21:44:02 +08:00
static const struct ethtool_ops dsa_slave_ethtool_ops = {
.get_drvinfo = dsa_slave_get_drvinfo,
.get_regs_len = dsa_slave_get_regs_len,
.get_regs = dsa_slave_get_regs,
.nway_reset = dsa_slave_nway_reset,
.get_link = ethtool_op_get_link,
.get_eeprom_len = dsa_slave_get_eeprom_len,
.get_eeprom = dsa_slave_get_eeprom,
.set_eeprom = dsa_slave_set_eeprom,
net: Distributed Switch Architecture protocol support Distributed Switch Architecture is a protocol for managing hardware switch chips. It consists of a set of MII management registers and commands to configure the switch, and an ethernet header format to signal which of the ports of the switch a packet was received from or is intended to be sent to. The switches that this driver supports are typically embedded in access points and routers, and a typical setup with a DSA switch looks something like this: +-----------+ +-----------+ | | RGMII | | | +-------+ +------ 1000baseT MDI ("WAN") | | | 6-port +------ 1000baseT MDI ("LAN1") | CPU | | ethernet +------ 1000baseT MDI ("LAN2") | |MIImgmt| switch +------ 1000baseT MDI ("LAN3") | +-------+ w/5 PHYs +------ 1000baseT MDI ("LAN4") | | | | +-----------+ +-----------+ The switch driver presents each port on the switch as a separate network interface to Linux, polls the switch to maintain software link state of those ports, forwards MII management interface accesses to those network interfaces (e.g. as done by ethtool) to the switch, and exposes the switch's hardware statistics counters via the appropriate Linux kernel interfaces. This initial patch supports the MII management interface register layout of the Marvell 88E6123, 88E6161 and 88E6165 switch chips, and supports the "Ethertype DSA" packet tagging format. (There is no officially registered ethertype for the Ethertype DSA packet format, so we just grab a random one. The ethertype to use is programmed into the switch, and the switch driver uses the value of ETH_P_EDSA for this, so this define can be changed at any time in the future if the one we chose is allocated to another protocol or if Ethertype DSA gets its own officially registered ethertype, and everything will continue to work.) Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Tested-by: Nicolas Pitre <nico@marvell.com> Tested-by: Byron Bradley <byron.bbradley@gmail.com> Tested-by: Tim Ellis <tim.ellis@mac.com> Tested-by: Peter van Valderen <linux@ddcrew.com> Tested-by: Dirk Teurlings <dirk@upexia.nl> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-07 21:44:02 +08:00
.get_strings = dsa_slave_get_strings,
.get_ethtool_stats = dsa_slave_get_ethtool_stats,
.get_sset_count = dsa_slave_get_sset_count,
.set_wol = dsa_slave_set_wol,
.get_wol = dsa_slave_get_wol,
.set_eee = dsa_slave_set_eee,
.get_eee = dsa_slave_get_eee,
.get_link_ksettings = dsa_slave_get_link_ksettings,
.set_link_ksettings = dsa_slave_set_link_ksettings,
.get_rxnfc = dsa_slave_get_rxnfc,
.set_rxnfc = dsa_slave_set_rxnfc,
.get_ts_info = dsa_slave_get_ts_info,
net: Distributed Switch Architecture protocol support Distributed Switch Architecture is a protocol for managing hardware switch chips. It consists of a set of MII management registers and commands to configure the switch, and an ethernet header format to signal which of the ports of the switch a packet was received from or is intended to be sent to. The switches that this driver supports are typically embedded in access points and routers, and a typical setup with a DSA switch looks something like this: +-----------+ +-----------+ | | RGMII | | | +-------+ +------ 1000baseT MDI ("WAN") | | | 6-port +------ 1000baseT MDI ("LAN1") | CPU | | ethernet +------ 1000baseT MDI ("LAN2") | |MIImgmt| switch +------ 1000baseT MDI ("LAN3") | +-------+ w/5 PHYs +------ 1000baseT MDI ("LAN4") | | | | +-----------+ +-----------+ The switch driver presents each port on the switch as a separate network interface to Linux, polls the switch to maintain software link state of those ports, forwards MII management interface accesses to those network interfaces (e.g. as done by ethtool) to the switch, and exposes the switch's hardware statistics counters via the appropriate Linux kernel interfaces. This initial patch supports the MII management interface register layout of the Marvell 88E6123, 88E6161 and 88E6165 switch chips, and supports the "Ethertype DSA" packet tagging format. (There is no officially registered ethertype for the Ethertype DSA packet format, so we just grab a random one. The ethertype to use is programmed into the switch, and the switch driver uses the value of ETH_P_EDSA for this, so this define can be changed at any time in the future if the one we chose is allocated to another protocol or if Ethertype DSA gets its own officially registered ethertype, and everything will continue to work.) Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Tested-by: Nicolas Pitre <nico@marvell.com> Tested-by: Byron Bradley <byron.bbradley@gmail.com> Tested-by: Tim Ellis <tim.ellis@mac.com> Tested-by: Peter van Valderen <linux@ddcrew.com> Tested-by: Dirk Teurlings <dirk@upexia.nl> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-07 21:44:02 +08:00
};
/* legacy way, bypassing the bridge *****************************************/
int dsa_legacy_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
struct net_device *dev,
const unsigned char *addr, u16 vid,
u16 flags,
struct netlink_ext_ack *extack)
{
struct dsa_port *dp = dsa_slave_to_port(dev);
return dsa_port_fdb_add(dp, addr, vid);
}
int dsa_legacy_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
struct net_device *dev,
const unsigned char *addr, u16 vid)
{
struct dsa_port *dp = dsa_slave_to_port(dev);
return dsa_port_fdb_del(dp, addr, vid);
}
static struct devlink_port *dsa_slave_get_devlink_port(struct net_device *dev)
{
struct dsa_port *dp = dsa_slave_to_port(dev);
return dp->ds->devlink ? &dp->devlink_port : NULL;
}
static const struct net_device_ops dsa_slave_netdev_ops = {
.ndo_open = dsa_slave_open,
.ndo_stop = dsa_slave_close,
.ndo_start_xmit = dsa_slave_xmit,
.ndo_change_rx_flags = dsa_slave_change_rx_flags,
.ndo_set_rx_mode = dsa_slave_set_rx_mode,
.ndo_set_mac_address = dsa_slave_set_mac_address,
.ndo_fdb_add = dsa_legacy_fdb_add,
.ndo_fdb_del = dsa_legacy_fdb_del,
.ndo_fdb_dump = dsa_slave_fdb_dump,
.ndo_do_ioctl = dsa_slave_ioctl,
.ndo_get_iflink = dsa_slave_get_iflink,
#ifdef CONFIG_NET_POLL_CONTROLLER
.ndo_netpoll_setup = dsa_slave_netpoll_setup,
.ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
.ndo_poll_controller = dsa_slave_poll_controller,
#endif
.ndo_get_phys_port_name = dsa_slave_get_phys_port_name,
.ndo_setup_tc = dsa_slave_setup_tc,
.ndo_get_stats64 = dsa_slave_get_stats64,
.ndo_get_port_parent_id = dsa_slave_get_port_parent_id,
.ndo_vlan_rx_add_vid = dsa_slave_vlan_rx_add_vid,
.ndo_vlan_rx_kill_vid = dsa_slave_vlan_rx_kill_vid,
.ndo_get_devlink_port = dsa_slave_get_devlink_port,
};
static struct device_type dsa_type = {
.name = "dsa",
};
void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up)
{
const struct dsa_port *dp = dsa_to_port(ds, port);
phylink_mac_change(dp->pl, up);
}
EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change);
static void dsa_slave_phylink_fixed_state(struct net_device *dev,
struct phylink_link_state *state)
{
struct dsa_port *dp = dsa_slave_to_port(dev);
struct dsa_switch *ds = dp->ds;
/* No need to check that this operation is valid, the callback would
* not be called if it was not.
*/
ds->ops->phylink_fixed_state(ds, dp->index, state);
}
net: Distributed Switch Architecture protocol support Distributed Switch Architecture is a protocol for managing hardware switch chips. It consists of a set of MII management registers and commands to configure the switch, and an ethernet header format to signal which of the ports of the switch a packet was received from or is intended to be sent to. The switches that this driver supports are typically embedded in access points and routers, and a typical setup with a DSA switch looks something like this: +-----------+ +-----------+ | | RGMII | | | +-------+ +------ 1000baseT MDI ("WAN") | | | 6-port +------ 1000baseT MDI ("LAN1") | CPU | | ethernet +------ 1000baseT MDI ("LAN2") | |MIImgmt| switch +------ 1000baseT MDI ("LAN3") | +-------+ w/5 PHYs +------ 1000baseT MDI ("LAN4") | | | | +-----------+ +-----------+ The switch driver presents each port on the switch as a separate network interface to Linux, polls the switch to maintain software link state of those ports, forwards MII management interface accesses to those network interfaces (e.g. as done by ethtool) to the switch, and exposes the switch's hardware statistics counters via the appropriate Linux kernel interfaces. This initial patch supports the MII management interface register layout of the Marvell 88E6123, 88E6161 and 88E6165 switch chips, and supports the "Ethertype DSA" packet tagging format. (There is no officially registered ethertype for the Ethertype DSA packet format, so we just grab a random one. The ethertype to use is programmed into the switch, and the switch driver uses the value of ETH_P_EDSA for this, so this define can be changed at any time in the future if the one we chose is allocated to another protocol or if Ethertype DSA gets its own officially registered ethertype, and everything will continue to work.) Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Tested-by: Nicolas Pitre <nico@marvell.com> Tested-by: Byron Bradley <byron.bbradley@gmail.com> Tested-by: Tim Ellis <tim.ellis@mac.com> Tested-by: Peter van Valderen <linux@ddcrew.com> Tested-by: Dirk Teurlings <dirk@upexia.nl> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-07 21:44:02 +08:00
/* slave device setup *******************************************************/
static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr)
{
struct dsa_port *dp = dsa_slave_to_port(slave_dev);
struct dsa_switch *ds = dp->ds;
slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr);
if (!slave_dev->phydev) {
netdev_err(slave_dev, "no phy at %d\n", addr);
return -ENODEV;
}
return phylink_connect_phy(dp->pl, slave_dev->phydev);
}
static int dsa_slave_phy_setup(struct net_device *slave_dev)
{
struct dsa_port *dp = dsa_slave_to_port(slave_dev);
struct device_node *port_dn = dp->dn;
struct dsa_switch *ds = dp->ds;
u32 phy_flags = 0;
int mode, ret;
mode = of_get_phy_mode(port_dn);
if (mode < 0)
mode = PHY_INTERFACE_MODE_NA;
net: phylink: Add struct phylink_config to PHYLINK API The phylink_config structure will encapsulate a pointer to a struct device and the operation type requested for this instance of PHYLINK. This patch does not make any functional changes, it just transitions the PHYLINK internals and all its users to the new API. A pointer to a phylink_config structure will be passed to phylink_create() instead of the net_device directly. Also, the same phylink_config pointer will be passed back to all phylink_mac_ops callbacks instead of the net_device. Using this mechanism, a PHYLINK user can get the original net_device using a structure such as 'to_net_dev(config->dev)' or directly the structure containing the phylink_config using a container_of call. At the moment, only the PHYLINK_NETDEV is defined as a valid operation type for PHYLINK. In this mode, a valid reference to a struct device linked to the original net_device should be passed to PHYLINK through the phylink_config structure. This API changes is mainly driven by the necessity of adding a new operation type in PHYLINK that disconnects the phy_device from the net_device and also works when the net_device is lacking. Signed-off-by: Ioana Ciornei <ioana.ciornei@nxp.com> Signed-off-by: Vladimir Oltean <olteanv@gmail.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com> Tested-by: Maxime Chevallier <maxime.chevallier@bootlin.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-05-29 01:38:12 +08:00
dp->pl_config.dev = &slave_dev->dev;
dp->pl_config.type = PHYLINK_NETDEV;
dp->pl = phylink_create(&dp->pl_config, of_fwnode_handle(port_dn), mode,
&dsa_port_phylink_mac_ops);
if (IS_ERR(dp->pl)) {
netdev_err(slave_dev,
"error creating PHYLINK: %ld\n", PTR_ERR(dp->pl));
return PTR_ERR(dp->pl);
}
/* Register only if the switch provides such a callback, since this
* callback takes precedence over polling the link GPIO in PHYLINK
* (see phylink_get_fixed_state).
*/
if (ds->ops->phylink_fixed_state)
phylink_fixed_state_cb(dp->pl, dsa_slave_phylink_fixed_state);
if (ds->ops->get_phy_flags)
phy_flags = ds->ops->get_phy_flags(ds, dp->index);
ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags);
if (ret == -ENODEV && ds->slave_mii_bus) {
/* We could not connect to a designated PHY or SFP, so try to
* use the switch internal MDIO bus instead
*/
ret = dsa_slave_phy_connect(slave_dev, dp->index);
if (ret) {
netdev_err(slave_dev,
"failed to connect to port %d: %d\n",
dp->index, ret);
phylink_destroy(dp->pl);
return ret;
}
}
return ret;
}
static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
struct netdev_queue *txq,
void *_unused)
{
lockdep_set_class(&txq->_xmit_lock,
&dsa_slave_netdev_xmit_lock_key);
}
int dsa_slave_suspend(struct net_device *slave_dev)
{
struct dsa_port *dp = dsa_slave_to_port(slave_dev);
if (!netif_running(slave_dev))
return 0;
net: dsa: Add support for deferred xmit Some hardware needs to take work to get convinced to receive frames on the CPU port (such as the sja1105 which takes temporary L2 forwarding rules over SPI that last for a single frame). Such work needs a sleepable context, and because the regular .ndo_start_xmit is atomic, this cannot be done in the tagger. So introduce a generic DSA mechanism that sets up a transmit skb queue and a workqueue for deferred transmission. The new driver callback (.port_deferred_xmit) is in dsa_switch and not in the tagger because the operations that require sleeping typically also involve interacting with the hardware, and not simply skb manipulations. Therefore having it there simplifies the structure a bit and makes it unnecessary to export functions from the driver to the tagger. The driver is responsible of calling dsa_enqueue_skb which transfers it to the master netdevice. This is so that it has a chance of performing some more work afterwards, such as cleanup or TX timestamping. To tell DSA that skb xmit deferral is required, I have thought about changing the return type of the tagger .xmit from struct sk_buff * into a enum dsa_tx_t that could potentially encode a DSA_XMIT_DEFER value. But the trailer tagger is reallocating every skb on xmit and therefore making a valid use of the pointer return value. So instead of reworking the API in complicated ways, right now a boolean property in the newly introduced DSA_SKB_CB is set. Signed-off-by: Vladimir Oltean <olteanv@gmail.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-05-05 18:19:25 +08:00
cancel_work_sync(&dp->xmit_work);
skb_queue_purge(&dp->xmit_queue);
netif_device_detach(slave_dev);
rtnl_lock();
phylink_stop(dp->pl);
rtnl_unlock();
return 0;
}
int dsa_slave_resume(struct net_device *slave_dev)
{
struct dsa_port *dp = dsa_slave_to_port(slave_dev);
if (!netif_running(slave_dev))
return 0;
netif_device_attach(slave_dev);
rtnl_lock();
phylink_start(dp->pl);
rtnl_unlock();
return 0;
}
static void dsa_slave_notify(struct net_device *dev, unsigned long val)
{
struct net_device *master = dsa_slave_to_master(dev);
struct dsa_port *dp = dsa_slave_to_port(dev);
struct dsa_notifier_register_info rinfo = {
.switch_number = dp->ds->index,
.port_number = dp->index,
.master = master,
.info.dev = dev,
};
call_dsa_notifiers(val, dev, &rinfo.info);
}
int dsa_slave_create(struct dsa_port *port)
net: Distributed Switch Architecture protocol support Distributed Switch Architecture is a protocol for managing hardware switch chips. It consists of a set of MII management registers and commands to configure the switch, and an ethernet header format to signal which of the ports of the switch a packet was received from or is intended to be sent to. The switches that this driver supports are typically embedded in access points and routers, and a typical setup with a DSA switch looks something like this: +-----------+ +-----------+ | | RGMII | | | +-------+ +------ 1000baseT MDI ("WAN") | | | 6-port +------ 1000baseT MDI ("LAN1") | CPU | | ethernet +------ 1000baseT MDI ("LAN2") | |MIImgmt| switch +------ 1000baseT MDI ("LAN3") | +-------+ w/5 PHYs +------ 1000baseT MDI ("LAN4") | | | | +-----------+ +-----------+ The switch driver presents each port on the switch as a separate network interface to Linux, polls the switch to maintain software link state of those ports, forwards MII management interface accesses to those network interfaces (e.g. as done by ethtool) to the switch, and exposes the switch's hardware statistics counters via the appropriate Linux kernel interfaces. This initial patch supports the MII management interface register layout of the Marvell 88E6123, 88E6161 and 88E6165 switch chips, and supports the "Ethertype DSA" packet tagging format. (There is no officially registered ethertype for the Ethertype DSA packet format, so we just grab a random one. The ethertype to use is programmed into the switch, and the switch driver uses the value of ETH_P_EDSA for this, so this define can be changed at any time in the future if the one we chose is allocated to another protocol or if Ethertype DSA gets its own officially registered ethertype, and everything will continue to work.) Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Tested-by: Nicolas Pitre <nico@marvell.com> Tested-by: Byron Bradley <byron.bbradley@gmail.com> Tested-by: Tim Ellis <tim.ellis@mac.com> Tested-by: Peter van Valderen <linux@ddcrew.com> Tested-by: Dirk Teurlings <dirk@upexia.nl> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-07 21:44:02 +08:00
{
const struct dsa_port *cpu_dp = port->cpu_dp;
struct net_device *master = cpu_dp->master;
struct dsa_switch *ds = port->ds;
const char *name = port->name;
net: Distributed Switch Architecture protocol support Distributed Switch Architecture is a protocol for managing hardware switch chips. It consists of a set of MII management registers and commands to configure the switch, and an ethernet header format to signal which of the ports of the switch a packet was received from or is intended to be sent to. The switches that this driver supports are typically embedded in access points and routers, and a typical setup with a DSA switch looks something like this: +-----------+ +-----------+ | | RGMII | | | +-------+ +------ 1000baseT MDI ("WAN") | | | 6-port +------ 1000baseT MDI ("LAN1") | CPU | | ethernet +------ 1000baseT MDI ("LAN2") | |MIImgmt| switch +------ 1000baseT MDI ("LAN3") | +-------+ w/5 PHYs +------ 1000baseT MDI ("LAN4") | | | | +-----------+ +-----------+ The switch driver presents each port on the switch as a separate network interface to Linux, polls the switch to maintain software link state of those ports, forwards MII management interface accesses to those network interfaces (e.g. as done by ethtool) to the switch, and exposes the switch's hardware statistics counters via the appropriate Linux kernel interfaces. This initial patch supports the MII management interface register layout of the Marvell 88E6123, 88E6161 and 88E6165 switch chips, and supports the "Ethertype DSA" packet tagging format. (There is no officially registered ethertype for the Ethertype DSA packet format, so we just grab a random one. The ethertype to use is programmed into the switch, and the switch driver uses the value of ETH_P_EDSA for this, so this define can be changed at any time in the future if the one we chose is allocated to another protocol or if Ethertype DSA gets its own officially registered ethertype, and everything will continue to work.) Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Tested-by: Nicolas Pitre <nico@marvell.com> Tested-by: Byron Bradley <byron.bbradley@gmail.com> Tested-by: Tim Ellis <tim.ellis@mac.com> Tested-by: Peter van Valderen <linux@ddcrew.com> Tested-by: Dirk Teurlings <dirk@upexia.nl> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-07 21:44:02 +08:00
struct net_device *slave_dev;
struct dsa_slave_priv *p;
int ret;
if (!ds->num_tx_queues)
ds->num_tx_queues = 1;
slave_dev = alloc_netdev_mqs(sizeof(struct dsa_slave_priv), name,
NET_NAME_UNKNOWN, ether_setup,
ds->num_tx_queues, 1);
net: Distributed Switch Architecture protocol support Distributed Switch Architecture is a protocol for managing hardware switch chips. It consists of a set of MII management registers and commands to configure the switch, and an ethernet header format to signal which of the ports of the switch a packet was received from or is intended to be sent to. The switches that this driver supports are typically embedded in access points and routers, and a typical setup with a DSA switch looks something like this: +-----------+ +-----------+ | | RGMII | | | +-------+ +------ 1000baseT MDI ("WAN") | | | 6-port +------ 1000baseT MDI ("LAN1") | CPU | | ethernet +------ 1000baseT MDI ("LAN2") | |MIImgmt| switch +------ 1000baseT MDI ("LAN3") | +-------+ w/5 PHYs +------ 1000baseT MDI ("LAN4") | | | | +-----------+ +-----------+ The switch driver presents each port on the switch as a separate network interface to Linux, polls the switch to maintain software link state of those ports, forwards MII management interface accesses to those network interfaces (e.g. as done by ethtool) to the switch, and exposes the switch's hardware statistics counters via the appropriate Linux kernel interfaces. This initial patch supports the MII management interface register layout of the Marvell 88E6123, 88E6161 and 88E6165 switch chips, and supports the "Ethertype DSA" packet tagging format. (There is no officially registered ethertype for the Ethertype DSA packet format, so we just grab a random one. The ethertype to use is programmed into the switch, and the switch driver uses the value of ETH_P_EDSA for this, so this define can be changed at any time in the future if the one we chose is allocated to another protocol or if Ethertype DSA gets its own officially registered ethertype, and everything will continue to work.) Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Tested-by: Nicolas Pitre <nico@marvell.com> Tested-by: Byron Bradley <byron.bbradley@gmail.com> Tested-by: Tim Ellis <tim.ellis@mac.com> Tested-by: Peter van Valderen <linux@ddcrew.com> Tested-by: Dirk Teurlings <dirk@upexia.nl> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-07 21:44:02 +08:00
if (slave_dev == NULL)
return -ENOMEM;
net: Distributed Switch Architecture protocol support Distributed Switch Architecture is a protocol for managing hardware switch chips. It consists of a set of MII management registers and commands to configure the switch, and an ethernet header format to signal which of the ports of the switch a packet was received from or is intended to be sent to. The switches that this driver supports are typically embedded in access points and routers, and a typical setup with a DSA switch looks something like this: +-----------+ +-----------+ | | RGMII | | | +-------+ +------ 1000baseT MDI ("WAN") | | | 6-port +------ 1000baseT MDI ("LAN1") | CPU | | ethernet +------ 1000baseT MDI ("LAN2") | |MIImgmt| switch +------ 1000baseT MDI ("LAN3") | +-------+ w/5 PHYs +------ 1000baseT MDI ("LAN4") | | | | +-----------+ +-----------+ The switch driver presents each port on the switch as a separate network interface to Linux, polls the switch to maintain software link state of those ports, forwards MII management interface accesses to those network interfaces (e.g. as done by ethtool) to the switch, and exposes the switch's hardware statistics counters via the appropriate Linux kernel interfaces. This initial patch supports the MII management interface register layout of the Marvell 88E6123, 88E6161 and 88E6165 switch chips, and supports the "Ethertype DSA" packet tagging format. (There is no officially registered ethertype for the Ethertype DSA packet format, so we just grab a random one. The ethertype to use is programmed into the switch, and the switch driver uses the value of ETH_P_EDSA for this, so this define can be changed at any time in the future if the one we chose is allocated to another protocol or if Ethertype DSA gets its own officially registered ethertype, and everything will continue to work.) Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Tested-by: Nicolas Pitre <nico@marvell.com> Tested-by: Byron Bradley <byron.bbradley@gmail.com> Tested-by: Tim Ellis <tim.ellis@mac.com> Tested-by: Peter van Valderen <linux@ddcrew.com> Tested-by: Dirk Teurlings <dirk@upexia.nl> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-07 21:44:02 +08:00
slave_dev->features = master->vlan_features | NETIF_F_HW_TC |
NETIF_F_HW_VLAN_CTAG_FILTER;
slave_dev->hw_features |= NETIF_F_HW_TC;
slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
if (!IS_ERR_OR_NULL(port->mac))
ether_addr_copy(slave_dev->dev_addr, port->mac);
else
eth_hw_addr_inherit(slave_dev, master);
slave_dev->priv_flags |= IFF_NO_QUEUE;
slave_dev->netdev_ops = &dsa_slave_netdev_ops;
slave_dev->min_mtu = 0;
slave_dev->max_mtu = ETH_MAX_MTU;
SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
NULL);
SET_NETDEV_DEV(slave_dev, port->ds->dev);
slave_dev->dev.of_node = port->dn;
slave_dev->vlan_features = master->vlan_features;
p = netdev_priv(slave_dev);
p->stats64 = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
if (!p->stats64) {
free_netdev(slave_dev);
return -ENOMEM;
}
p->dp = port;
INIT_LIST_HEAD(&p->mall_tc_list);
net: dsa: Add support for deferred xmit Some hardware needs to take work to get convinced to receive frames on the CPU port (such as the sja1105 which takes temporary L2 forwarding rules over SPI that last for a single frame). Such work needs a sleepable context, and because the regular .ndo_start_xmit is atomic, this cannot be done in the tagger. So introduce a generic DSA mechanism that sets up a transmit skb queue and a workqueue for deferred transmission. The new driver callback (.port_deferred_xmit) is in dsa_switch and not in the tagger because the operations that require sleeping typically also involve interacting with the hardware, and not simply skb manipulations. Therefore having it there simplifies the structure a bit and makes it unnecessary to export functions from the driver to the tagger. The driver is responsible of calling dsa_enqueue_skb which transfers it to the master netdevice. This is so that it has a chance of performing some more work afterwards, such as cleanup or TX timestamping. To tell DSA that skb xmit deferral is required, I have thought about changing the return type of the tagger .xmit from struct sk_buff * into a enum dsa_tx_t that could potentially encode a DSA_XMIT_DEFER value. But the trailer tagger is reallocating every skb on xmit and therefore making a valid use of the pointer return value. So instead of reworking the API in complicated ways, right now a boolean property in the newly introduced DSA_SKB_CB is set. Signed-off-by: Vladimir Oltean <olteanv@gmail.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2019-05-05 18:19:25 +08:00
INIT_WORK(&port->xmit_work, dsa_port_xmit_work);
skb_queue_head_init(&port->xmit_queue);
p->xmit = cpu_dp->tag_ops->xmit;
port->slave = slave_dev;
net: Distributed Switch Architecture protocol support Distributed Switch Architecture is a protocol for managing hardware switch chips. It consists of a set of MII management registers and commands to configure the switch, and an ethernet header format to signal which of the ports of the switch a packet was received from or is intended to be sent to. The switches that this driver supports are typically embedded in access points and routers, and a typical setup with a DSA switch looks something like this: +-----------+ +-----------+ | | RGMII | | | +-------+ +------ 1000baseT MDI ("WAN") | | | 6-port +------ 1000baseT MDI ("LAN1") | CPU | | ethernet +------ 1000baseT MDI ("LAN2") | |MIImgmt| switch +------ 1000baseT MDI ("LAN3") | +-------+ w/5 PHYs +------ 1000baseT MDI ("LAN4") | | | | +-----------+ +-----------+ The switch driver presents each port on the switch as a separate network interface to Linux, polls the switch to maintain software link state of those ports, forwards MII management interface accesses to those network interfaces (e.g. as done by ethtool) to the switch, and exposes the switch's hardware statistics counters via the appropriate Linux kernel interfaces. This initial patch supports the MII management interface register layout of the Marvell 88E6123, 88E6161 and 88E6165 switch chips, and supports the "Ethertype DSA" packet tagging format. (There is no officially registered ethertype for the Ethertype DSA packet format, so we just grab a random one. The ethertype to use is programmed into the switch, and the switch driver uses the value of ETH_P_EDSA for this, so this define can be changed at any time in the future if the one we chose is allocated to another protocol or if Ethertype DSA gets its own officially registered ethertype, and everything will continue to work.) Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Tested-by: Nicolas Pitre <nico@marvell.com> Tested-by: Byron Bradley <byron.bbradley@gmail.com> Tested-by: Tim Ellis <tim.ellis@mac.com> Tested-by: Peter van Valderen <linux@ddcrew.com> Tested-by: Dirk Teurlings <dirk@upexia.nl> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-07 21:44:02 +08:00
netif_carrier_off(slave_dev);
ret = dsa_slave_phy_setup(slave_dev);
if (ret) {
netdev_err(master, "error %d setting up slave phy\n", ret);
goto out_free;
}
dsa_slave_notify(slave_dev, DSA_PORT_REGISTER);
ret = register_netdev(slave_dev);
if (ret) {
netdev_err(master, "error %d registering interface %s\n",
ret, slave_dev->name);
goto out_phy;
}
return 0;
out_phy:
rtnl_lock();
phylink_disconnect_phy(p->dp->pl);
rtnl_unlock();
phylink_destroy(p->dp->pl);
out_free:
free_percpu(p->stats64);
free_netdev(slave_dev);
port->slave = NULL;
return ret;
net: Distributed Switch Architecture protocol support Distributed Switch Architecture is a protocol for managing hardware switch chips. It consists of a set of MII management registers and commands to configure the switch, and an ethernet header format to signal which of the ports of the switch a packet was received from or is intended to be sent to. The switches that this driver supports are typically embedded in access points and routers, and a typical setup with a DSA switch looks something like this: +-----------+ +-----------+ | | RGMII | | | +-------+ +------ 1000baseT MDI ("WAN") | | | 6-port +------ 1000baseT MDI ("LAN1") | CPU | | ethernet +------ 1000baseT MDI ("LAN2") | |MIImgmt| switch +------ 1000baseT MDI ("LAN3") | +-------+ w/5 PHYs +------ 1000baseT MDI ("LAN4") | | | | +-----------+ +-----------+ The switch driver presents each port on the switch as a separate network interface to Linux, polls the switch to maintain software link state of those ports, forwards MII management interface accesses to those network interfaces (e.g. as done by ethtool) to the switch, and exposes the switch's hardware statistics counters via the appropriate Linux kernel interfaces. This initial patch supports the MII management interface register layout of the Marvell 88E6123, 88E6161 and 88E6165 switch chips, and supports the "Ethertype DSA" packet tagging format. (There is no officially registered ethertype for the Ethertype DSA packet format, so we just grab a random one. The ethertype to use is programmed into the switch, and the switch driver uses the value of ETH_P_EDSA for this, so this define can be changed at any time in the future if the one we chose is allocated to another protocol or if Ethertype DSA gets its own officially registered ethertype, and everything will continue to work.) Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Tested-by: Nicolas Pitre <nico@marvell.com> Tested-by: Byron Bradley <byron.bbradley@gmail.com> Tested-by: Tim Ellis <tim.ellis@mac.com> Tested-by: Peter van Valderen <linux@ddcrew.com> Tested-by: Dirk Teurlings <dirk@upexia.nl> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-07 21:44:02 +08:00
}
void dsa_slave_destroy(struct net_device *slave_dev)
{
struct dsa_port *dp = dsa_slave_to_port(slave_dev);
struct dsa_slave_priv *p = netdev_priv(slave_dev);
netif_carrier_off(slave_dev);
rtnl_lock();
phylink_disconnect_phy(dp->pl);
rtnl_unlock();
dsa_slave_notify(slave_dev, DSA_PORT_UNREGISTER);
unregister_netdev(slave_dev);
phylink_destroy(dp->pl);
free_percpu(p->stats64);
free_netdev(slave_dev);
}
static bool dsa_slave_dev_check(const struct net_device *dev)
{
return dev->netdev_ops == &dsa_slave_netdev_ops;
}
static int dsa_slave_changeupper(struct net_device *dev,
struct netdev_notifier_changeupper_info *info)
{
struct dsa_port *dp = dsa_slave_to_port(dev);
int err = NOTIFY_DONE;
if (netif_is_bridge_master(info->upper_dev)) {
if (info->linking) {
err = dsa_port_bridge_join(dp, info->upper_dev);
err = notifier_from_errno(err);
} else {
dsa_port_bridge_leave(dp, info->upper_dev);
err = NOTIFY_OK;
}
}
return err;
}
static int dsa_slave_upper_vlan_check(struct net_device *dev,
struct netdev_notifier_changeupper_info *
info)
{
struct netlink_ext_ack *ext_ack;
struct net_device *slave;
struct dsa_port *dp;
ext_ack = netdev_notifier_info_to_extack(&info->info);
if (!is_vlan_dev(dev))
return NOTIFY_DONE;
slave = vlan_dev_real_dev(dev);
if (!dsa_slave_dev_check(slave))
return NOTIFY_DONE;
dp = dsa_slave_to_port(slave);
if (!dp->bridge_dev)
return NOTIFY_DONE;
/* Deny enslaving a VLAN device into a VLAN-aware bridge */
if (br_vlan_enabled(dp->bridge_dev) &&
netif_is_bridge_master(info->upper_dev) && info->linking) {
NL_SET_ERR_MSG_MOD(ext_ack,
"Cannot enslave VLAN device into VLAN aware bridge");
return notifier_from_errno(-EINVAL);
}
return NOTIFY_DONE;
}
static int dsa_slave_netdevice_event(struct notifier_block *nb,
unsigned long event, void *ptr)
{
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
if (event == NETDEV_CHANGEUPPER) {
if (!dsa_slave_dev_check(dev))
return dsa_slave_upper_vlan_check(dev, ptr);
return dsa_slave_changeupper(dev, ptr);
}
return NOTIFY_DONE;
}
struct dsa_switchdev_event_work {
struct work_struct work;
struct switchdev_notifier_fdb_info fdb_info;
struct net_device *dev;
unsigned long event;
};
static void dsa_slave_switchdev_event_work(struct work_struct *work)
{
struct dsa_switchdev_event_work *switchdev_work =
container_of(work, struct dsa_switchdev_event_work, work);
struct net_device *dev = switchdev_work->dev;
struct switchdev_notifier_fdb_info *fdb_info;
struct dsa_port *dp = dsa_slave_to_port(dev);
int err;
rtnl_lock();
switch (switchdev_work->event) {
case SWITCHDEV_FDB_ADD_TO_DEVICE:
fdb_info = &switchdev_work->fdb_info;
net: dsa: fix added_by_user switchdev notification Commit 161d82de1ff8 ("net: bridge: Notify about !added_by_user FDB entries") causes the below oops when bringing up a slave interface, because dsa_port_fdb_add is still scheduled, but with a NULL address. To fix this, keep the dsa_slave_switchdev_event function agnostic of the notified info structure and handle the added_by_user flag in the specific dsa_slave_switchdev_event_work function. [ 75.512263] Unable to handle kernel NULL pointer dereference at virtual address 00000000 [ 75.519063] pgd = (ptrval) [ 75.520545] [00000000] *pgd=00000000 [ 75.522839] Internal error: Oops: 17 [#1] ARM [ 75.525898] Modules linked in: [ 75.527673] CPU: 0 PID: 9 Comm: kworker/u2:1 Not tainted 4.17.0-rc2 #78 [ 75.532988] Hardware name: Freescale Vybrid VF5xx/VF6xx (Device Tree) [ 75.538153] Workqueue: dsa_ordered dsa_slave_switchdev_event_work [ 75.542970] PC is at mv88e6xxx_port_db_load_purge+0x60/0x1b0 [ 75.547341] LR is at mdiobus_read_nested+0x6c/0x78 [ 75.550833] pc : [<804cd5c0>] lr : [<804bba84>] psr: 60070013 [ 75.555796] sp : 9f54bd78 ip : 9f54bd87 fp : 9f54bddc [ 75.559719] r10: 00000000 r9 : 0000000e r8 : 9f6a6010 [ 75.563643] r7 : 00000000 r6 : 81203048 r5 : 9f6a6010 r4 : 9f6a601c [ 75.568867] r3 : 00000000 r2 : 00000000 r1 : 0000000d r0 : 00000000 [ 75.574094] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none [ 75.579933] Control: 10c53c7d Table: 9de20059 DAC: 00000051 [ 75.584384] Process kworker/u2:1 (pid: 9, stack limit = 0x(ptrval)) [ 75.589349] Stack: (0x9f54bd78 to 0x9f54c000) [ 75.592406] bd60: 00000000 00000000 [ 75.599295] bd80: 00000391 9f299d10 9f299d68 8014317c 9f7f0000 8120af00 00006dc2 00000000 [ 75.606186] bda0: 8120af00 00000000 9f54bdec 1c9f5d92 8014317c 9f6a601c 9f6a6010 00000000 [ 75.613076] bdc0: 00000000 00000000 9dd1141c 8125a0b4 9f54be0c 9f54bde0 804cd8a8 804cd56c [ 75.619966] bde0: 0000000e 80143680 00000001 9dce9c1c 81203048 9dce9c10 00000003 00000000 [ 75.626858] be00: 9f54be5c 9f54be10 806abcac 804cd864 9f54be54 80143664 8014317c 80143054 [ 75.633748] be20: ffcaa81d 00000000 812030b0 1c9f5d92 00000000 81203048 9f54beb4 00000003 [ 75.640639] be40: ffffffff 00000000 9dd1141c 8125a0b4 9f54be84 9f54be60 80138e98 806abb18 [ 75.647529] be60: 81203048 9ddc4000 9dce9c54 9f72a300 00000000 00000000 9f54be9c 9f54be88 [ 75.654420] be80: 801390bc 80138e50 00000000 9dce9c54 9f54beac 9f54bea0 806a9524 801390a0 [ 75.661310] bea0: 9f54bedc 9f54beb0 806a9c7c 806a950c 9f54becc 00000000 00000000 00000000 [ 75.668201] bec0: 9f540000 1c9f5d92 805fe604 9ddffc00 9f54befc 9f54bee0 806ab228 806a9c38 [ 75.675092] bee0: 806ab178 9ddffc00 9f4c1900 9f40d200 9f54bf34 9f54bf00 80131e30 806ab184 [ 75.681983] bf00: 9f40d214 9f54a038 9f40d200 9f40d200 9f4c1918 812119a0 9f40d214 9f54a038 [ 75.688873] bf20: 9f40d200 9f4c1900 9f54bf7c 9f54bf38 80132124 80131d1c 9f5f2dd8 00000000 [ 75.695764] bf40: 812119a0 9f54a038 812119a0 81259c5b 9f5f2dd8 9f5f2dc0 9f53dbc0 00000000 [ 75.702655] bf60: 9f4c1900 801320b4 9f5f2dd8 9f4f7e88 9f54bfac 9f54bf80 80137ad0 801320c0 [ 75.709544] bf80: 9f54a000 9f53dbc0 801379a0 00000000 00000000 00000000 00000000 00000000 [ 75.716434] bfa0: 00000000 9f54bfb0 801010e8 801379ac 00000000 00000000 00000000 00000000 [ 75.723324] bfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 75.730206] bfe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000 [ 75.737083] Backtrace: [ 75.738252] [<804cd560>] (mv88e6xxx_port_db_load_purge) from [<804cd8a8>] (mv88e6xxx_port_fdb_add+0x50/0x68) [ 75.746795] r10:8125a0b4 r9:9dd1141c r8:00000000 r7:00000000 r6:00000000 r5:9f6a6010 [ 75.753323] r4:9f6a601c [ 75.754570] [<804cd858>] (mv88e6xxx_port_fdb_add) from [<806abcac>] (dsa_switch_event+0x1a0/0x660) [ 75.762238] r8:00000000 r7:00000003 r6:9dce9c10 r5:81203048 r4:9dce9c1c [ 75.767655] [<806abb0c>] (dsa_switch_event) from [<80138e98>] (notifier_call_chain+0x54/0x94) [ 75.774893] r10:8125a0b4 r9:9dd1141c r8:00000000 r7:ffffffff r6:00000003 r5:9f54beb4 [ 75.781423] r4:81203048 [ 75.782672] [<80138e44>] (notifier_call_chain) from [<801390bc>] (raw_notifier_call_chain+0x28/0x30) [ 75.790514] r9:00000000 r8:00000000 r7:9f72a300 r6:9dce9c54 r5:9ddc4000 r4:81203048 [ 75.796982] [<80139094>] (raw_notifier_call_chain) from [<806a9524>] (dsa_port_notify+0x24/0x38) [ 75.804483] [<806a9500>] (dsa_port_notify) from [<806a9c7c>] (dsa_port_fdb_add+0x50/0x6c) [ 75.811371] [<806a9c2c>] (dsa_port_fdb_add) from [<806ab228>] (dsa_slave_switchdev_event_work+0xb0/0x10c) [ 75.819635] r4:9ddffc00 [ 75.820885] [<806ab178>] (dsa_slave_switchdev_event_work) from [<80131e30>] (process_one_work+0x120/0x3a4) [ 75.829241] r6:9f40d200 r5:9f4c1900 r4:9ddffc00 r3:806ab178 [ 75.833612] [<80131d10>] (process_one_work) from [<80132124>] (worker_thread+0x70/0x574) [ 75.840415] r10:9f4c1900 r9:9f40d200 r8:9f54a038 r7:9f40d214 r6:812119a0 r5:9f4c1918 [ 75.846945] r4:9f40d200 [ 75.848191] [<801320b4>] (worker_thread) from [<80137ad0>] (kthread+0x130/0x160) [ 75.854300] r10:9f4f7e88 r9:9f5f2dd8 r8:801320b4 r7:9f4c1900 r6:00000000 r5:9f53dbc0 [ 75.860830] r4:9f5f2dc0 [ 75.862076] [<801379a0>] (kthread) from [<801010e8>] (ret_from_fork+0x14/0x2c) [ 75.867999] Exception stack(0x9f54bfb0 to 0x9f54bff8) [ 75.871753] bfa0: 00000000 00000000 00000000 00000000 [ 75.878640] bfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 75.885519] bfe0: 00000000 00000000 00000000 00000000 00000013 00000000 [ 75.890844] r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:801379a0 [ 75.897377] r4:9f53dbc0 r3:9f54a000 [ 75.899663] Code: e3a02000 e3a03000 e14b26f4 e24bc055 (e5973000) [ 75.904575] ---[ end trace fbca818a124dbf0d ]--- Fixes: 816a3bed9549 ("switchdev: Add fdb.added_by_user to switchdev notifications") Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Reviewed-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-09 11:03:12 +08:00
if (!fdb_info->added_by_user)
break;
err = dsa_port_fdb_add(dp, fdb_info->addr, fdb_info->vid);
if (err) {
netdev_dbg(dev, "fdb add failed err=%d\n", err);
break;
}
fdb_info->offloaded = true;
call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED, dev,
&fdb_info->info, NULL);
break;
case SWITCHDEV_FDB_DEL_TO_DEVICE:
fdb_info = &switchdev_work->fdb_info;
net: dsa: fix added_by_user switchdev notification Commit 161d82de1ff8 ("net: bridge: Notify about !added_by_user FDB entries") causes the below oops when bringing up a slave interface, because dsa_port_fdb_add is still scheduled, but with a NULL address. To fix this, keep the dsa_slave_switchdev_event function agnostic of the notified info structure and handle the added_by_user flag in the specific dsa_slave_switchdev_event_work function. [ 75.512263] Unable to handle kernel NULL pointer dereference at virtual address 00000000 [ 75.519063] pgd = (ptrval) [ 75.520545] [00000000] *pgd=00000000 [ 75.522839] Internal error: Oops: 17 [#1] ARM [ 75.525898] Modules linked in: [ 75.527673] CPU: 0 PID: 9 Comm: kworker/u2:1 Not tainted 4.17.0-rc2 #78 [ 75.532988] Hardware name: Freescale Vybrid VF5xx/VF6xx (Device Tree) [ 75.538153] Workqueue: dsa_ordered dsa_slave_switchdev_event_work [ 75.542970] PC is at mv88e6xxx_port_db_load_purge+0x60/0x1b0 [ 75.547341] LR is at mdiobus_read_nested+0x6c/0x78 [ 75.550833] pc : [<804cd5c0>] lr : [<804bba84>] psr: 60070013 [ 75.555796] sp : 9f54bd78 ip : 9f54bd87 fp : 9f54bddc [ 75.559719] r10: 00000000 r9 : 0000000e r8 : 9f6a6010 [ 75.563643] r7 : 00000000 r6 : 81203048 r5 : 9f6a6010 r4 : 9f6a601c [ 75.568867] r3 : 00000000 r2 : 00000000 r1 : 0000000d r0 : 00000000 [ 75.574094] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none [ 75.579933] Control: 10c53c7d Table: 9de20059 DAC: 00000051 [ 75.584384] Process kworker/u2:1 (pid: 9, stack limit = 0x(ptrval)) [ 75.589349] Stack: (0x9f54bd78 to 0x9f54c000) [ 75.592406] bd60: 00000000 00000000 [ 75.599295] bd80: 00000391 9f299d10 9f299d68 8014317c 9f7f0000 8120af00 00006dc2 00000000 [ 75.606186] bda0: 8120af00 00000000 9f54bdec 1c9f5d92 8014317c 9f6a601c 9f6a6010 00000000 [ 75.613076] bdc0: 00000000 00000000 9dd1141c 8125a0b4 9f54be0c 9f54bde0 804cd8a8 804cd56c [ 75.619966] bde0: 0000000e 80143680 00000001 9dce9c1c 81203048 9dce9c10 00000003 00000000 [ 75.626858] be00: 9f54be5c 9f54be10 806abcac 804cd864 9f54be54 80143664 8014317c 80143054 [ 75.633748] be20: ffcaa81d 00000000 812030b0 1c9f5d92 00000000 81203048 9f54beb4 00000003 [ 75.640639] be40: ffffffff 00000000 9dd1141c 8125a0b4 9f54be84 9f54be60 80138e98 806abb18 [ 75.647529] be60: 81203048 9ddc4000 9dce9c54 9f72a300 00000000 00000000 9f54be9c 9f54be88 [ 75.654420] be80: 801390bc 80138e50 00000000 9dce9c54 9f54beac 9f54bea0 806a9524 801390a0 [ 75.661310] bea0: 9f54bedc 9f54beb0 806a9c7c 806a950c 9f54becc 00000000 00000000 00000000 [ 75.668201] bec0: 9f540000 1c9f5d92 805fe604 9ddffc00 9f54befc 9f54bee0 806ab228 806a9c38 [ 75.675092] bee0: 806ab178 9ddffc00 9f4c1900 9f40d200 9f54bf34 9f54bf00 80131e30 806ab184 [ 75.681983] bf00: 9f40d214 9f54a038 9f40d200 9f40d200 9f4c1918 812119a0 9f40d214 9f54a038 [ 75.688873] bf20: 9f40d200 9f4c1900 9f54bf7c 9f54bf38 80132124 80131d1c 9f5f2dd8 00000000 [ 75.695764] bf40: 812119a0 9f54a038 812119a0 81259c5b 9f5f2dd8 9f5f2dc0 9f53dbc0 00000000 [ 75.702655] bf60: 9f4c1900 801320b4 9f5f2dd8 9f4f7e88 9f54bfac 9f54bf80 80137ad0 801320c0 [ 75.709544] bf80: 9f54a000 9f53dbc0 801379a0 00000000 00000000 00000000 00000000 00000000 [ 75.716434] bfa0: 00000000 9f54bfb0 801010e8 801379ac 00000000 00000000 00000000 00000000 [ 75.723324] bfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 75.730206] bfe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000 [ 75.737083] Backtrace: [ 75.738252] [<804cd560>] (mv88e6xxx_port_db_load_purge) from [<804cd8a8>] (mv88e6xxx_port_fdb_add+0x50/0x68) [ 75.746795] r10:8125a0b4 r9:9dd1141c r8:00000000 r7:00000000 r6:00000000 r5:9f6a6010 [ 75.753323] r4:9f6a601c [ 75.754570] [<804cd858>] (mv88e6xxx_port_fdb_add) from [<806abcac>] (dsa_switch_event+0x1a0/0x660) [ 75.762238] r8:00000000 r7:00000003 r6:9dce9c10 r5:81203048 r4:9dce9c1c [ 75.767655] [<806abb0c>] (dsa_switch_event) from [<80138e98>] (notifier_call_chain+0x54/0x94) [ 75.774893] r10:8125a0b4 r9:9dd1141c r8:00000000 r7:ffffffff r6:00000003 r5:9f54beb4 [ 75.781423] r4:81203048 [ 75.782672] [<80138e44>] (notifier_call_chain) from [<801390bc>] (raw_notifier_call_chain+0x28/0x30) [ 75.790514] r9:00000000 r8:00000000 r7:9f72a300 r6:9dce9c54 r5:9ddc4000 r4:81203048 [ 75.796982] [<80139094>] (raw_notifier_call_chain) from [<806a9524>] (dsa_port_notify+0x24/0x38) [ 75.804483] [<806a9500>] (dsa_port_notify) from [<806a9c7c>] (dsa_port_fdb_add+0x50/0x6c) [ 75.811371] [<806a9c2c>] (dsa_port_fdb_add) from [<806ab228>] (dsa_slave_switchdev_event_work+0xb0/0x10c) [ 75.819635] r4:9ddffc00 [ 75.820885] [<806ab178>] (dsa_slave_switchdev_event_work) from [<80131e30>] (process_one_work+0x120/0x3a4) [ 75.829241] r6:9f40d200 r5:9f4c1900 r4:9ddffc00 r3:806ab178 [ 75.833612] [<80131d10>] (process_one_work) from [<80132124>] (worker_thread+0x70/0x574) [ 75.840415] r10:9f4c1900 r9:9f40d200 r8:9f54a038 r7:9f40d214 r6:812119a0 r5:9f4c1918 [ 75.846945] r4:9f40d200 [ 75.848191] [<801320b4>] (worker_thread) from [<80137ad0>] (kthread+0x130/0x160) [ 75.854300] r10:9f4f7e88 r9:9f5f2dd8 r8:801320b4 r7:9f4c1900 r6:00000000 r5:9f53dbc0 [ 75.860830] r4:9f5f2dc0 [ 75.862076] [<801379a0>] (kthread) from [<801010e8>] (ret_from_fork+0x14/0x2c) [ 75.867999] Exception stack(0x9f54bfb0 to 0x9f54bff8) [ 75.871753] bfa0: 00000000 00000000 00000000 00000000 [ 75.878640] bfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 75.885519] bfe0: 00000000 00000000 00000000 00000000 00000013 00000000 [ 75.890844] r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:801379a0 [ 75.897377] r4:9f53dbc0 r3:9f54a000 [ 75.899663] Code: e3a02000 e3a03000 e14b26f4 e24bc055 (e5973000) [ 75.904575] ---[ end trace fbca818a124dbf0d ]--- Fixes: 816a3bed9549 ("switchdev: Add fdb.added_by_user to switchdev notifications") Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Reviewed-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-09 11:03:12 +08:00
if (!fdb_info->added_by_user)
break;
err = dsa_port_fdb_del(dp, fdb_info->addr, fdb_info->vid);
if (err) {
netdev_dbg(dev, "fdb del failed err=%d\n", err);
dev_close(dev);
}
break;
}
rtnl_unlock();
kfree(switchdev_work->fdb_info.addr);
kfree(switchdev_work);
dev_put(dev);
}
static int
dsa_slave_switchdev_fdb_work_init(struct dsa_switchdev_event_work *
switchdev_work,
const struct switchdev_notifier_fdb_info *
fdb_info)
{
memcpy(&switchdev_work->fdb_info, fdb_info,
sizeof(switchdev_work->fdb_info));
switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC);
if (!switchdev_work->fdb_info.addr)
return -ENOMEM;
ether_addr_copy((u8 *)switchdev_work->fdb_info.addr,
fdb_info->addr);
return 0;
}
/* Called under rcu_read_lock() */
static int dsa_slave_switchdev_event(struct notifier_block *unused,
unsigned long event, void *ptr)
{
struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
struct dsa_switchdev_event_work *switchdev_work;
int err;
if (event == SWITCHDEV_PORT_ATTR_SET) {
err = switchdev_handle_port_attr_set(dev, ptr,
dsa_slave_dev_check,
dsa_slave_port_attr_set);
return notifier_from_errno(err);
}
if (!dsa_slave_dev_check(dev))
return NOTIFY_DONE;
switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
if (!switchdev_work)
return NOTIFY_BAD;
INIT_WORK(&switchdev_work->work,
dsa_slave_switchdev_event_work);
switchdev_work->dev = dev;
switchdev_work->event = event;
switch (event) {
case SWITCHDEV_FDB_ADD_TO_DEVICE: /* fall through */
case SWITCHDEV_FDB_DEL_TO_DEVICE:
net: dsa: fix added_by_user switchdev notification Commit 161d82de1ff8 ("net: bridge: Notify about !added_by_user FDB entries") causes the below oops when bringing up a slave interface, because dsa_port_fdb_add is still scheduled, but with a NULL address. To fix this, keep the dsa_slave_switchdev_event function agnostic of the notified info structure and handle the added_by_user flag in the specific dsa_slave_switchdev_event_work function. [ 75.512263] Unable to handle kernel NULL pointer dereference at virtual address 00000000 [ 75.519063] pgd = (ptrval) [ 75.520545] [00000000] *pgd=00000000 [ 75.522839] Internal error: Oops: 17 [#1] ARM [ 75.525898] Modules linked in: [ 75.527673] CPU: 0 PID: 9 Comm: kworker/u2:1 Not tainted 4.17.0-rc2 #78 [ 75.532988] Hardware name: Freescale Vybrid VF5xx/VF6xx (Device Tree) [ 75.538153] Workqueue: dsa_ordered dsa_slave_switchdev_event_work [ 75.542970] PC is at mv88e6xxx_port_db_load_purge+0x60/0x1b0 [ 75.547341] LR is at mdiobus_read_nested+0x6c/0x78 [ 75.550833] pc : [<804cd5c0>] lr : [<804bba84>] psr: 60070013 [ 75.555796] sp : 9f54bd78 ip : 9f54bd87 fp : 9f54bddc [ 75.559719] r10: 00000000 r9 : 0000000e r8 : 9f6a6010 [ 75.563643] r7 : 00000000 r6 : 81203048 r5 : 9f6a6010 r4 : 9f6a601c [ 75.568867] r3 : 00000000 r2 : 00000000 r1 : 0000000d r0 : 00000000 [ 75.574094] Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none [ 75.579933] Control: 10c53c7d Table: 9de20059 DAC: 00000051 [ 75.584384] Process kworker/u2:1 (pid: 9, stack limit = 0x(ptrval)) [ 75.589349] Stack: (0x9f54bd78 to 0x9f54c000) [ 75.592406] bd60: 00000000 00000000 [ 75.599295] bd80: 00000391 9f299d10 9f299d68 8014317c 9f7f0000 8120af00 00006dc2 00000000 [ 75.606186] bda0: 8120af00 00000000 9f54bdec 1c9f5d92 8014317c 9f6a601c 9f6a6010 00000000 [ 75.613076] bdc0: 00000000 00000000 9dd1141c 8125a0b4 9f54be0c 9f54bde0 804cd8a8 804cd56c [ 75.619966] bde0: 0000000e 80143680 00000001 9dce9c1c 81203048 9dce9c10 00000003 00000000 [ 75.626858] be00: 9f54be5c 9f54be10 806abcac 804cd864 9f54be54 80143664 8014317c 80143054 [ 75.633748] be20: ffcaa81d 00000000 812030b0 1c9f5d92 00000000 81203048 9f54beb4 00000003 [ 75.640639] be40: ffffffff 00000000 9dd1141c 8125a0b4 9f54be84 9f54be60 80138e98 806abb18 [ 75.647529] be60: 81203048 9ddc4000 9dce9c54 9f72a300 00000000 00000000 9f54be9c 9f54be88 [ 75.654420] be80: 801390bc 80138e50 00000000 9dce9c54 9f54beac 9f54bea0 806a9524 801390a0 [ 75.661310] bea0: 9f54bedc 9f54beb0 806a9c7c 806a950c 9f54becc 00000000 00000000 00000000 [ 75.668201] bec0: 9f540000 1c9f5d92 805fe604 9ddffc00 9f54befc 9f54bee0 806ab228 806a9c38 [ 75.675092] bee0: 806ab178 9ddffc00 9f4c1900 9f40d200 9f54bf34 9f54bf00 80131e30 806ab184 [ 75.681983] bf00: 9f40d214 9f54a038 9f40d200 9f40d200 9f4c1918 812119a0 9f40d214 9f54a038 [ 75.688873] bf20: 9f40d200 9f4c1900 9f54bf7c 9f54bf38 80132124 80131d1c 9f5f2dd8 00000000 [ 75.695764] bf40: 812119a0 9f54a038 812119a0 81259c5b 9f5f2dd8 9f5f2dc0 9f53dbc0 00000000 [ 75.702655] bf60: 9f4c1900 801320b4 9f5f2dd8 9f4f7e88 9f54bfac 9f54bf80 80137ad0 801320c0 [ 75.709544] bf80: 9f54a000 9f53dbc0 801379a0 00000000 00000000 00000000 00000000 00000000 [ 75.716434] bfa0: 00000000 9f54bfb0 801010e8 801379ac 00000000 00000000 00000000 00000000 [ 75.723324] bfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 75.730206] bfe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000 [ 75.737083] Backtrace: [ 75.738252] [<804cd560>] (mv88e6xxx_port_db_load_purge) from [<804cd8a8>] (mv88e6xxx_port_fdb_add+0x50/0x68) [ 75.746795] r10:8125a0b4 r9:9dd1141c r8:00000000 r7:00000000 r6:00000000 r5:9f6a6010 [ 75.753323] r4:9f6a601c [ 75.754570] [<804cd858>] (mv88e6xxx_port_fdb_add) from [<806abcac>] (dsa_switch_event+0x1a0/0x660) [ 75.762238] r8:00000000 r7:00000003 r6:9dce9c10 r5:81203048 r4:9dce9c1c [ 75.767655] [<806abb0c>] (dsa_switch_event) from [<80138e98>] (notifier_call_chain+0x54/0x94) [ 75.774893] r10:8125a0b4 r9:9dd1141c r8:00000000 r7:ffffffff r6:00000003 r5:9f54beb4 [ 75.781423] r4:81203048 [ 75.782672] [<80138e44>] (notifier_call_chain) from [<801390bc>] (raw_notifier_call_chain+0x28/0x30) [ 75.790514] r9:00000000 r8:00000000 r7:9f72a300 r6:9dce9c54 r5:9ddc4000 r4:81203048 [ 75.796982] [<80139094>] (raw_notifier_call_chain) from [<806a9524>] (dsa_port_notify+0x24/0x38) [ 75.804483] [<806a9500>] (dsa_port_notify) from [<806a9c7c>] (dsa_port_fdb_add+0x50/0x6c) [ 75.811371] [<806a9c2c>] (dsa_port_fdb_add) from [<806ab228>] (dsa_slave_switchdev_event_work+0xb0/0x10c) [ 75.819635] r4:9ddffc00 [ 75.820885] [<806ab178>] (dsa_slave_switchdev_event_work) from [<80131e30>] (process_one_work+0x120/0x3a4) [ 75.829241] r6:9f40d200 r5:9f4c1900 r4:9ddffc00 r3:806ab178 [ 75.833612] [<80131d10>] (process_one_work) from [<80132124>] (worker_thread+0x70/0x574) [ 75.840415] r10:9f4c1900 r9:9f40d200 r8:9f54a038 r7:9f40d214 r6:812119a0 r5:9f4c1918 [ 75.846945] r4:9f40d200 [ 75.848191] [<801320b4>] (worker_thread) from [<80137ad0>] (kthread+0x130/0x160) [ 75.854300] r10:9f4f7e88 r9:9f5f2dd8 r8:801320b4 r7:9f4c1900 r6:00000000 r5:9f53dbc0 [ 75.860830] r4:9f5f2dc0 [ 75.862076] [<801379a0>] (kthread) from [<801010e8>] (ret_from_fork+0x14/0x2c) [ 75.867999] Exception stack(0x9f54bfb0 to 0x9f54bff8) [ 75.871753] bfa0: 00000000 00000000 00000000 00000000 [ 75.878640] bfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 75.885519] bfe0: 00000000 00000000 00000000 00000000 00000013 00000000 [ 75.890844] r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:801379a0 [ 75.897377] r4:9f53dbc0 r3:9f54a000 [ 75.899663] Code: e3a02000 e3a03000 e14b26f4 e24bc055 (e5973000) [ 75.904575] ---[ end trace fbca818a124dbf0d ]--- Fixes: 816a3bed9549 ("switchdev: Add fdb.added_by_user to switchdev notifications") Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com> Reviewed-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2018-05-09 11:03:12 +08:00
if (dsa_slave_switchdev_fdb_work_init(switchdev_work, ptr))
goto err_fdb_work_init;
dev_hold(dev);
break;
default:
kfree(switchdev_work);
return NOTIFY_DONE;
}
dsa_schedule_work(&switchdev_work->work);
return NOTIFY_OK;
err_fdb_work_init:
kfree(switchdev_work);
return NOTIFY_BAD;
}
static int dsa_slave_switchdev_blocking_event(struct notifier_block *unused,
unsigned long event, void *ptr)
{
struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
int err;
switch (event) {
case SWITCHDEV_PORT_OBJ_ADD:
err = switchdev_handle_port_obj_add(dev, ptr,
dsa_slave_dev_check,
dsa_slave_port_obj_add);
return notifier_from_errno(err);
case SWITCHDEV_PORT_OBJ_DEL:
err = switchdev_handle_port_obj_del(dev, ptr,
dsa_slave_dev_check,
dsa_slave_port_obj_del);
return notifier_from_errno(err);
case SWITCHDEV_PORT_ATTR_SET:
err = switchdev_handle_port_attr_set(dev, ptr,
dsa_slave_dev_check,
dsa_slave_port_attr_set);
return notifier_from_errno(err);
}
return NOTIFY_DONE;
}
static struct notifier_block dsa_slave_nb __read_mostly = {
.notifier_call = dsa_slave_netdevice_event,
};
static struct notifier_block dsa_slave_switchdev_notifier = {
.notifier_call = dsa_slave_switchdev_event,
};
static struct notifier_block dsa_slave_switchdev_blocking_notifier = {
.notifier_call = dsa_slave_switchdev_blocking_event,
};
int dsa_slave_register_notifier(void)
{
struct notifier_block *nb;
int err;
err = register_netdevice_notifier(&dsa_slave_nb);
if (err)
return err;
err = register_switchdev_notifier(&dsa_slave_switchdev_notifier);
if (err)
goto err_switchdev_nb;
nb = &dsa_slave_switchdev_blocking_notifier;
err = register_switchdev_blocking_notifier(nb);
if (err)
goto err_switchdev_blocking_nb;
return 0;
err_switchdev_blocking_nb:
unregister_switchdev_notifier(&dsa_slave_switchdev_notifier);
err_switchdev_nb:
unregister_netdevice_notifier(&dsa_slave_nb);
return err;
}
void dsa_slave_unregister_notifier(void)
{
struct notifier_block *nb;
int err;
nb = &dsa_slave_switchdev_blocking_notifier;
err = unregister_switchdev_blocking_notifier(nb);
if (err)
pr_err("DSA: failed to unregister switchdev blocking notifier (%d)\n", err);
err = unregister_switchdev_notifier(&dsa_slave_switchdev_notifier);
if (err)
pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err);
err = unregister_netdevice_notifier(&dsa_slave_nb);
if (err)
pr_err("DSA: failed to unregister slave notifier (%d)\n", err);
}