With the upcoming support for cross-chip operations and other mv88e6xxx
enhancements, new files will be added.

Similarly to mlxsw or b53, move mv88e6xxx files into their own folder.

In the meantime, update the MAINTAINERS entry to please checkpatch.pl,
by replacing the invalid 88E6352 entry with 88E6XXX, maintained by
Andrew and myself.
Signed-off-by: NVivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Due to a typo we would always be using the MIB counter width of the
first element of the counter array instead of the current element, and
we would always be accessing the register statistics with a 64-bits
read, while some could be 32-bits. This got unnoticed in testing with
MDIO and SRAB which tolerate doing this, but testing with the SPI bus
revealed bogus values being returned. Fix this by using the proper
iterator here.

Fixes: 967dd82f ("net: dsa: b53: Add support for Broadcom RoboSwitch")
Reported-by: NJonas Gorski <jogo@openwrt.org>
Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

When the SMI address of the switch chip is zero, the chip assumes to be
the only one on the SMI master bus and thus responds to all its known
SMI devices addresses (port registers, Global2, etc.)

When its SMI address is not zero, some chips (e.g. 88E6352) use an
indirect access through two SMI Command and Data registers.

Other models (e.g. 88E6060) using less than 16 internal SMI addresses
always use a direct access.

Add a capability flag to describe chips supporting the (indirect)
Multi-chip Addressing Mode, and a low-level API to access the registers
via SMI.

Other accesses (like Ethernet management frames) may be added later.
Signed-off-by: NVivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The switch ID is located at address 0x3 of every Port Registers bank.

But not all Marvell switches have their Port Registers SMI Addresses
starting at 0x10. 88E6060 starts at 0x8 and 88E6390 starts at 0x0.

Add this data in the info structure and use it in the detection code.
Signed-off-by: NVivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

After allocating the chip structure, pass it a compatible info pointer.

The compatible info structure will be used later to describe how to
access the switch registers and where to read the switch ID.

For the standard MDIO probe, get it from the device node data. For the
legacy DSA driver probing, pass it the 88E6085 info.
Signed-off-by: NVivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Extract the common detection code which assigns the info structure to
the chip given the read switch ID.
Signed-off-by: NVivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add an helper function to isolate SMI specific assignments and checks.

This function will later help choosing the different SMI accesses based
of the compatible info.

Since the chip structure is already allocated in the legacy probe, use
the mv88e6xxx_reg_read access routine instead of __mv88e6xxx_reg_read.
Signed-off-by: NVivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add an helper function to allocate the chip structure at the beginning
of the probe functions. It will be used to initialize the SMI access.
Signed-off-by: NVivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The chip smi_mutex mutex is used to protect the access to the internal
switch registers, not only the Multi-chip Addressing Mode, as commented.

Since we will isolate SMI-specific pieces of code, avoid the confusion
now by renaming smi_mutex to reg_lock. No functional changes here.
Signed-off-by: NVivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The mv88e6xxx_table array and the mv88e6xxx_lookup_info function are
static, so remove the table and size arguments from the lookup function.
Signed-off-by: NVivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Use the optional variant to get the reset GPIO line, instead of checking
for the -ENOENT error.
Signed-off-by: NVivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The mixed assignments, allocations and registrations in the probe code
make it hard to follow the logic and figure out what is DSA or chip
specific.

Extract the struct dsa_switch related code in a simple
mv88e6xxx_register_switch helper function.

For symmetry in the code, add a mv88e6xxx_unregister_switch function.
Signed-off-by: NVivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The MDIO device probe and remove functions are respectively incrementing
and decrementing the bus refcount themselves. Since these bus level
actions are out of the device scope, remove them.
Signed-off-by: NVivien Didelot <vivien.didelot@savoirfairelinux.com>
Acked-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

In the MDIO probing function, dev is already assigned to &mdiodev->dev
and np is already assigned to mdiodev->dev.of_node, so use them.
Signed-off-by: NVivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The chip->ds and ds->slave_mii_bus assignments are common to both legacy
and new MDIO probing and are already done in the later setup code.

Remove the duplicated assignments from the MDIO probing code.
Signed-off-by: NVivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch fixes 5 style problems reported by checkpatch:

    WARNING: suspect code indent for conditional statements (8, 24)
    #492: FILE: drivers/net/dsa/mv88e6xxx.c:492:
    +	if (phydev->link)
    +			reg |= PORT_PCS_CTRL_LINK_UP;

    CHECK: Logical continuations should be on the previous line
    #1318: FILE: drivers/net/dsa/mv88e6xxx.c:1318:
    +		     oldstate == PORT_CONTROL_STATE_FORWARDING)
    +		    && (state == PORT_CONTROL_STATE_DISABLED ||

    CHECK: multiple assignments should be avoided
    #1662: FILE: drivers/net/dsa/mv88e6xxx.c:1662:
    +		vlan->vid_begin = vlan->vid_end = next.vid;

    WARNING: line over 80 characters
    #2097: FILE: drivers/net/dsa/mv88e6xxx.c:2097:
    +				       const struct switchdev_obj_port_vlan *vlan,

    WARNING: suspect code indent for conditional statements (16, 32)
    #2734: FILE: drivers/net/dsa/mv88e6xxx.c:2734:
    +		if (mv88e6xxx_6352_family(ps) || mv88e6xxx_6351_family(ps) ||
    [...]
    +				reg |= PORT_CONTROL_EGRESS_ADD_TAG;

    total: 0 errors, 3 warnings, 2 checks, 3805 lines checked

It also rebases and integrates changes sent by Ben Dooks [1]:

    The driver has a number of functions that are not exported or
    declared elsewhere, so make them static to avoid the following
    warnings from sparse:

    drivers/net/dsa/mv88e6xxx.c:113:5: warning: symbol 'mv88e6xxx_reg_read' was not declared. Should it be static?
    drivers/net/dsa/mv88e6xxx.c:167:5: warning: symbol 'mv88e6xxx_reg_write' was not declared. Should it be static?
    drivers/net/dsa/mv88e6xxx.c:231:5: warning: symbol 'mv88e6xxx_set_addr' was not declared. Should it be static?
    drivers/net/dsa/mv88e6xxx.c:367:6: warning: symbol 'mv88e6xxx_ppu_state_init' was not declared. Should it be static?
    drivers/net/dsa/mv88e6xxx.c:3157:5: warning: symbol 'mv88e6xxx_phy_page_read' was not declared. Should it be static?
    drivers/net/dsa/mv88e6xxx.c:3169:5: warning: symbol 'mv88e6xxx_phy_page_write' was not declared. Should it be static?
    drivers/net/dsa/mv88e6xxx.c:3583:26: warning: symbol 'mv88e6xxx_switch_driver' was not declared. Should it be static?
    drivers/net/dsa/mv88e6xxx.c:3621:5: warning: symbol 'mv88e6xxx_probe' was not declared. Should it be static?

[1] http://patchwork.ozlabs.org/patch/632708/Signed-off-by: NVivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The b53 dsa register access confusingly uses __raw register accessors
when both the CPU and the device are big-endian, but it uses little-
endian accessors when the same device is used from a little-endian
CPU, which makes no sense.

This uses normal accessors in device-endianess all the time, which
will work in all four combinations of register and CPU endianess,
and it will have the same barrier semantics in all cases.

This also seems to take care of a (false positive) warning I'm getting:

drivers/net/dsa/b53/b53_mmap.c: In function 'b53_mmap_read64':
drivers/net/dsa/b53/b53_mmap.c:109:10: error: 'hi' may be used uninitialized in this function [-Werror=maybe-uninitialized]
  *val = ((u64)hi << 32) | lo;

I originally planned to submit another patch for that warning
and did this one as a preparation cleanup, but it does seem to be
sufficient by itself.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Acked-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add support for configuration VLANs on B53 devices by implementing the
port VLAN add/del/dump functions. We currently default to a behavior
which is equivalent to having VLAN filtering turned on, where all VLANs
not programmed into the VLAN port-based vector will be discarded on
ingress.
Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add support for HW bridging by tying the ports together in the same port
VLAN mask when they belong to the same bridge, and isolating them to be
alone with the CPU port when they are not.

Propagate STP states from the bridge layer to the switch's HW mapping
when requested.
Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Adds support for FDB add/delete/dump using the ARL read/write logic and
the ARL search logic for faster dumps. The code is made flexible enough
it could support devices with a different register layout like BCM5325
and BCM5365 which have fewer number of entries or pack values into a
single 64 bits register.
Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The Broadcom BCM7445 STB chip has an issued in its revision D0 which was
previously worked around in drivers/net/dsa/bcm_sf2.c where we may
end-up double programming the integrated BCM7445 switch (bcm_sf2) and an
external Broadcom switch such as BCM53125, since these are mostly
register compatible.

Add a small quirk which just defers probing until we are sitting on the
slave DSA MDIO bus, which will allow us to intercept reads/writes and
funnel them through the SF2 internal MDIO master (which happens to
disconnect its pseudo PHY).
Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This patch adds support for Broadcom's BCM53xx switch family, also known
as RoboSwitch. Some of these switches are ubiquituous, found in home
routers, Wi-Fi routers, DSL and cable modem gateways and other
networking related products.

This drivers adds the library driver (b53_common.c) as well as a few bus
glue drivers for MDIO, SPI, Switch Register Access Block (SRAB) and
memory-mapped I/O into a SoC's address space (Broadcom BCM63xx/33xx).

Basic operations are supported to bring the Layer 1/2 up and running,
but not much more at this point, subsequent patches add the remaining
features.
Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add support for configuring VLANs on the Broadcom Starfigther2 switch.
This is all done through the bridge vlan facility just like other DSA
drivers.
Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add the definitions for the VLAN registers that we are going to
manipulate in subsequent patches.
Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Re-order the bcm_sf2_sw_setup() function so that it is at the far end of
the driver to avoid any kind of forward declarations.
Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add a helper function to fast age something that is controlled by the
caller: port, VLAN. We will use this to implement a VLAN fast age
operation.
Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Register a slave MDIO bus which allows us to divert problematic
read/writes towards conflicting pseudo-PHY address (30). Do no longer
rely on DSA's slave_mii_bus, but instead provide our own implementation
which offers more flexibility as to what to do, and when to register it.

We need to register it by the time we are able to get access to our
memory mapped registers, which is not until drv->setup() time. In order
to avoid forward declarations, we need to re-order the function bodies a
bit.
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Reviewed-by: NVivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The existing DSA binding has a number of limitations and problems. The
main problem is that it cannot represent a switch as a linux device,
hanging off some bus. It is limited to one CPU port. The DSA platform
device is artificial, and does not really represent hardware.

Implement a new binding which can be embedded into any type of node on
a bus to represent one switch device, and its links to other switches.
Signed-off-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Have the switch driver register its own MDIO bus. This allows for an
mdio property in the device tree, with child nodes for phys, which
can be referenced via phandles, etc.
Signed-off-by: NAndrew Lunn <andrew@lunn.ch>
Reviewed-by: NVivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The switch implements a generic MDIO bus, which could host more than
PHYs. It is conventional to use _mdio_ or _mii_ in the function name,
so rename them. Also postfix make the historically first read/write
function with _direct, to help distinguish it from _indirect and _ppu.

While touching these functions, remove some of the _ prefixes, which
we are deprecating.
Signed-off-by: NAndrew Lunn <andrew@lunn.ch>
Reviewed-by: NVivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The merged driver no longer offers the option to use DSA tagging. So
remove the code to setup the switch to do DSA tagging and hard code
the use of EDSA.
Signed-off-by: NAndrew Lunn <andrew@lunn.ch>
Reviewed-by: NFlorian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>y
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The new binding will not have a chip data structure, it will place the
routing directly into the switch structure. To enable backwards
compatibility, copy the routing from the chip data into the switch
structure.
Signed-off-by: NAndrew Lunn <andrew@lunn.ch>
Reviewed-by: NFlorian Fainelli <f.fainelli@gmail.com>
Reviewed-by: NVivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

With a maximum of four switches, the size of the routing table is the
same as the pointer to it. Removing it makes the code simpler.
Signed-off-by: NAndrew Lunn <andrew@lunn.ch>
Reviewed-by: NFlorian Fainelli <f.fainelli@gmail.com>
Reviewed-by: NVivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

There are going to be more per-port members added to the switch
structure. So add a port structure and move the netdev into it.
Signed-off-by: NAndrew Lunn <andrew@lunn.ch>
Reviewed-by: NFlorian Fainelli <f.fainelli@gmail.com>
Reviewed-by: NVivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Lock debugging shows that there is a possible circular lock in the PPU
work code. Switch the lock order of smi_mutex and ppu_mutex to fix this.

Here's the full trace:

    [    4.341325] ======================================================
    [    4.347519] [ INFO: possible circular locking dependency detected ]
    [    4.353800] 4.6.0 #4 Not tainted
    [    4.357039] -------------------------------------------------------
    [    4.363315] kworker/0:1/328 is trying to acquire lock:
    [    4.368463]  (&ps->smi_mutex){+.+.+.}, at: [<8049c758>] mv88e6xxx_reg_read+0x30/0x54
    [    4.376313]
    [    4.376313] but task is already holding lock:
    [    4.382160]  (&ps->ppu_mutex){+.+...}, at: [<8049cac0>] mv88e6xxx_ppu_reenable_work+0x28/0xd4
    [    4.390772]
    [    4.390772] which lock already depends on the new lock.
    [    4.390772]
    [    4.398963]
    [    4.398963] the existing dependency chain (in reverse order) is:
    [    4.406461]
    [    4.406461] -> #1 (&ps->ppu_mutex){+.+...}:
    [    4.410897]        [<806d86bc>] mutex_lock_nested+0x54/0x360
    [    4.416606]        [<8049a800>] mv88e6xxx_ppu_access_get+0x28/0x100
    [    4.422906]        [<8049b778>] mv88e6xxx_phy_read+0x90/0xdc
    [    4.428599]        [<806a4534>] dsa_slave_phy_read+0x3c/0x40
    [    4.434300]        [<804943ec>] mdiobus_read+0x68/0x80
    [    4.439481]        [<804939d4>] get_phy_device+0x58/0x1d8
    [    4.444914]        [<80493ed0>] mdiobus_scan+0x24/0xf4
    [    4.450078]        [<8049409c>] __mdiobus_register+0xfc/0x1ac
    [    4.455857]        [<806a40b0>] dsa_probe+0x860/0xca8
    [    4.460934]        [<8043246c>] platform_drv_probe+0x5c/0xc0
    [    4.466627]        [<804305a0>] driver_probe_device+0x118/0x450
    [    4.472589]        [<80430b00>] __device_attach_driver+0xac/0x128
    [    4.478724]        [<8042e350>] bus_for_each_drv+0x74/0xa8
    [    4.484235]        [<804302d8>] __device_attach+0xc4/0x154
    [    4.489755]        [<80430cec>] device_initial_probe+0x1c/0x20
    [    4.495612]        [<8042f620>] bus_probe_device+0x98/0xa0
    [    4.501123]        [<8042fbd0>] deferred_probe_work_func+0x4c/0xd4
    [    4.507328]        [<8013a794>] process_one_work+0x1a8/0x604
    [    4.513030]        [<8013ac54>] worker_thread+0x64/0x528
    [    4.518367]        [<801409e8>] kthread+0xec/0x100
    [    4.523201]        [<80108f30>] ret_from_fork+0x14/0x24
    [    4.528462]
    [    4.528462] -> #0 (&ps->smi_mutex){+.+.+.}:
    [    4.532895]        [<8015ad5c>] lock_acquire+0xb4/0x1dc
    [    4.538154]        [<806d86bc>] mutex_lock_nested+0x54/0x360
    [    4.543856]        [<8049c758>] mv88e6xxx_reg_read+0x30/0x54
    [    4.549549]        [<8049cad8>] mv88e6xxx_ppu_reenable_work+0x40/0xd4
    [    4.556022]        [<8013a794>] process_one_work+0x1a8/0x604
    [    4.561707]        [<8013ac54>] worker_thread+0x64/0x528
    [    4.567053]        [<801409e8>] kthread+0xec/0x100
    [    4.571878]        [<80108f30>] ret_from_fork+0x14/0x24
    [    4.577139]
    [    4.577139] other info that might help us debug this:
    [    4.577139]
    [    4.585159]  Possible unsafe locking scenario:
    [    4.585159]
    [    4.591093]        CPU0                    CPU1
    [    4.595631]        ----                    ----
    [    4.600169]   lock(&ps->ppu_mutex);
    [    4.603693]                                lock(&ps->smi_mutex);
    [    4.609742]                                lock(&ps->ppu_mutex);
    [    4.615790]   lock(&ps->smi_mutex);
    [    4.619314]
    [    4.619314]  *** DEADLOCK ***
    [    4.619314]
    [    4.625256] 3 locks held by kworker/0:1/328:
    [    4.629537]  #0:  ("events"){.+.+..}, at: [<8013a704>] process_one_work+0x118/0x604
    [    4.637288]  #1:  ((&ps->ppu_work)){+.+...}, at: [<8013a704>] process_one_work+0x118/0x604
    [    4.645653]  #2:  (&ps->ppu_mutex){+.+...}, at: [<8049cac0>] mv88e6xxx_ppu_reenable_work+0x28/0xd4
    [    4.654714]
    [    4.654714] stack backtrace:
    [    4.659098] CPU: 0 PID: 328 Comm: kworker/0:1 Not tainted 4.6.0 #4
    [    4.665286] Hardware name: Freescale Vybrid VF5xx/VF6xx (Device Tree)
    [    4.671748] Workqueue: events mv88e6xxx_ppu_reenable_work
    [    4.677174] Backtrace:
    [    4.679674] [<8010d354>] (dump_backtrace) from [<8010d5a0>] (show_stack+0x20/0x24)
    [    4.687252]  r6:80fb3c88 r5:80fb3c88 r4:80fb4728 r3:00000002
    [    4.693003] [<8010d580>] (show_stack) from [<803b45e8>] (dump_stack+0x24/0x28)
    [    4.700246] [<803b45c4>] (dump_stack) from [<80157398>] (print_circular_bug+0x208/0x32c)
    [    4.708361] [<80157190>] (print_circular_bug) from [<8015a630>] (__lock_acquire+0x185c/0x1b80)
    [    4.716982]  r10:9ec22a00 r9:00000060 r8:8164b6bc r7:00000040 r6:00000003 r5:8163a5b4
    [    4.724905]  r4:00000003 r3:9ec22de8
    [    4.728537] [<80158dd4>] (__lock_acquire) from [<8015ad5c>] (lock_acquire+0xb4/0x1dc)
    [    4.736378]  r10:60000013 r9:00000000 r8:00000000 r7:00000000 r6:9e5e9c50 r5:80e618e0
    [    4.744301]  r4:00000000
    [    4.746879] [<8015aca8>] (lock_acquire) from [<806d86bc>] (mutex_lock_nested+0x54/0x360)
    [    4.754976]  r10:9e5e9c1c r9:80e616c4 r8:9f685ea0 r7:0000001b r6:9ec22a00 r5:8163a5b4
    [    4.762899]  r4:9e5e9c1c
    [    4.765477] [<806d8668>] (mutex_lock_nested) from [<8049c758>] (mv88e6xxx_reg_read+0x30/0x54)
    [    4.774008]  r10:80e60c5b r9:80e616c4 r8:9f685ea0 r7:0000001b r6:00000004 r5:9e5e9c10
    [    4.781930]  r4:9e5e9c1c
    [    4.784507] [<8049c728>] (mv88e6xxx_reg_read) from [<8049cad8>] (mv88e6xxx_ppu_reenable_work+0x40/0xd4)
    [    4.793907]  r7:9ffd5400 r6:9e5e9c68 r5:9e5e9cb0 r4:9e5e9c10
    [    4.799659] [<8049ca98>] (mv88e6xxx_ppu_reenable_work) from [<8013a794>] (process_one_work+0x1a8/0x604)
    [    4.809059]  r9:80e616c4 r8:9f685ea0 r7:9ffd5400 r6:80e0a1c8 r5:9f5f2e80 r4:9e5e9cb0
    [    4.816910] [<8013a5ec>] (process_one_work) from [<8013ac54>] (worker_thread+0x64/0x528)
    [    4.825010]  r10:9f5f2e80 r9:00000008 r8:80e0dc80 r7:80e0a1fc r6:80e0a1c8 r5:9f5f2e98
    [    4.832933]  r4:80e0a1c8
    [    4.835510] [<8013abf0>] (worker_thread) from [<801409e8>] (kthread+0xec/0x100)
    [    4.842827]  r10:00000000 r9:00000000 r8:00000000 r7:8013abf0 r6:9f5f2e80 r5:9ec15740
    [    4.850749]  r4:00000000
    [    4.853327] [<801408fc>] (kthread) from [<80108f30>] (ret_from_fork+0x14/0x24)
    [    4.860557]  r7:00000000 r6:00000000 r5:801408fc r4:9ec15740
Signed-off-by: NVivien Didelot <vivien.didelot@savoirfairelinux.com>
Reviewed-by: NFlorian Fainelli <f.fainelli@gmail.com>
Reviewed-by: NVivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Now that the bridge code defers the switchdev port state setting, there
is no need to defer the port STP state change within the mv88e6xxx code.
Thus get rid of the driver's bridge work code.

This also fixes a race condition where the DSA layer assumes that the
bridge code already set the unbridged port's STP state to Disabled
before restoring the Forwarding state.

As a consequence, this also fixes the FDB flush for the unbridged port
which now correctly occurs during the Forwarding to Disabled transition.

Fixes: 0bc05d58 ("switchdev: allow caller to explicitly request attr_set as deferred")
Reported-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NVivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

A switch can export an attached EEPROM using the standard ethtool API.
However the switch itself cannot determine the size of the EEPROM, and
multiple sizes are allowed. Thus a device tree property is supported
to indicate the length of the EEPROM. Parse this property during
device probe, and implement a callback function to retrieve it.
Signed-off-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The dsa_switch structure contains a dsa_chip_data member called pd.
However in the rest of the code, pd is used for dsa_platform_data.
This is confusing. Rename it cd, which is already often used in dsa.c
and slave.c for this data type.
Signed-off-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The switch drivers only use the master_dev member for dev_info()
messages.  Now that the device is passed to the old style probe, and
new style drivers are probed as true linux drivers, this is no longer
needed.
Signed-off-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Resetting the switch is something the driver does, not the framework.
So move the parsing of this property into the driver.

There are no in kernel users of this property, so moving it does not
break anything. There is however a board which will make use of this
property making its way into the kernel.
Signed-off-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>