Add Byte Queue Limits (BQL) support to via-rhine driver.

[edumazet] tweaked patch and changed TX_RING_SIZE from 16 to 64
Signed-off-by: NTino Reichardt <milky-kernel@mcmilk.de>
Tested-by: NJamie Gloudon <jamie.gloudon@gmail.com>
Signed-off-by: NEric Dumazet <edumazet@google.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

mii_check_media() does not update the link (carrier) state or log link
changes when the link mode is forced.  Drivers using the mii library
must do this themselves, but most of them do not.

Instead of changing them all, provide a sensible default behaviour
similar to mii_check_link() when the mode is forced.

via-rhine depends on it being a no-op in this case, so make its call
to mii_check_media() conditional.
Signed-off-by: NBen Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The same macros are used for rx as well. So rename it.
Signed-off-by: NJiri Pirko <jiri@resnulli.us>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

A platform_driver does not need to set an owner, it will be populated by the
driver core.
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>

This patch fix spelling typo in printk.
Signed-off-by: NMasanari Iida <standby24x7@gmail.com>
Acked-by: NGeert Uytterhoeven <geert@linux-m68k.org>
Acked-by: NRandy Dunlap <rdunlap@infradead.org>
Signed-off-by: NJiri Kosina <jkosina@suse.cz>

We should prefer `struct pci_device_id` over `DEFINE_PCI_DEVICE_TABLE` to
meet kernel coding style guidelines.  This issue was reported by checkpatch.

A simplified version of the semantic patch that makes this change is as
follows (http://coccinelle.lip6.fr/):

// <smpl>

@@
identifier i;
declarer name DEFINE_PCI_DEVICE_TABLE;
initializer z;
@@

- DEFINE_PCI_DEVICE_TABLE(i)
+ const struct pci_device_id i[]
= z;

// </smpl>

[bhelgaas: add semantic patch]
Signed-off-by: NBenoit Taine <benoit.taine@lip6.fr>
Signed-off-by: NBjorn Helgaas <bhelgaas@google.com>

With some specific configuration (VT6105M on Soekris 5510 and depending
on the device at the other end), fragmented packets were not transmitted
when forcing 100 full-duplex with autoneg disable.

This fix now write full-duplex chips register when forcing full or
half-duplex not only when autoneg is enable.
Signed-off-by: NFrançois Cachereul <f.cachereul@alphalink.fr>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This introduces another flag in 'quirks' to replace the preprocessor
define (USE_MMIO) used to indicate whether the device needs a
separate enable routine to operate in MMIO mode.

All of the currently known platform Rhine cores operate in MMIO
mode by default, and on PCI it is preferred over PIO for performance
reasons. However, a comment in code suggests that some (?) early
Rhine cores only work in PIO mode, so they should not be switched
to MMIO.

Enabling MMIO on PCI is still triggered by the same Kconfig option
to avoid breaking user configs needlessly, but this can be changed
going forward towards automatic runtime detection in case a list of
PIO-only Rhine revisions can be compiled.

This also fixes a couple of compiler warnings detected by Fengguang
Wu's test bot (!USE_MMIO case):

   drivers/net/ethernet/via/via-rhine.c: In function 'rhine_init_one_pci':
   drivers/net/ethernet/via/via-rhine.c:1108:1: warning: label 'err_out_unmap' defined but not used [-Wunused-label]
    err_out_unmap:
    ^
   drivers/net/ethernet/via/via-rhine.c:1022:6: warning: unused variable 'i' [-Wunused-variable]
     int i, rc;
         ^
   drivers/net/ethernet/via/via-rhine.c:916:22: warning: 'quirks' may be used uninitialized in this function [-Wmaybe-uninitialized]
     phy_id = rp->quirks & rqIntPHY ? 1 : 0;
                         ^
   drivers/net/ethernet/via/via-rhine.c:1026:6: note: 'quirks' was declared here
     u32 quirks;
         ^
Signed-off-by: NAlexey Charkov <alchark@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This adds two new flags to quirks and thus removes the need to carry
revision in rhine_private. As a result, the init logic is simplified
a bit.

This also fixes a compiler warning in OF code on 64bit due to pointer
casting:

        drivers/net/ethernet/via/via-rhine.c: In function ‘rhine_init_one_platform’:
        drivers/net/ethernet/via/via-rhine.c:1132:13: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
          revision = (u32)match->data;
                     ^

That code was added in commit 2d283862
("net: via-rhine: add OF bus binding").

Tested in platform configuration on a VIA WM8950 APC Rock board.
Reported-by: NJan Moskyto Matejka <mq@suse.cz>
Signed-off-by: NAlexey Charkov <alchark@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

This should make the driver usable with VIA/WonderMedia ARM-based
Systems-on-Chip integrated Rhine III adapters. Note that these
are always in MMIO mode, and don't have any known EEPROM.
Signed-off-by: NAlexey Charkov <alchark@gmail.com>
Acked-by: NRob Herring <robh@kernel.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Use more generic data structures instead of struct pci_dev wherever
possible in preparation for OF bus binding
Signed-off-by: NAlexey Charkov <alchark@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Remove legacy PCI DMA wrappers and instead use generic DMA functions
directly in preparation for OF bus binding
Signed-off-by: NAlexey Charkov <alchark@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Replace dev_kfree_skb with dev_kfree_skb_any in velocity_xmit that can
be called in hard irq and other contexts.  Packets are freed and
dropped in velocity_xmit when they are too fragmented and can
not be linearized.
Signed-off-by: N"Eric W. Biederman" <ebiederm@xmission.com>

Replace dev_kfree_skb with dev_kfree_skb_any in rhine_start_tx which
can be called in hard irq and other contexts.  Packets are only freed
in rhine_start_tx if they are dropped.

Replace dev_kfree_skb with dev_consume_skb_any in rhine_tx that can be
called in hard irq and other contexts.  rhine_tx handles successfully
transmitted packets.
Signed-off-by: N"Eric W. Biederman" <ebiederm@xmission.com>

Currently, via-rhine fails to call pci_disable_device() for errors
in rhine_init_one().
Reported-by: NHuqiu Liu <liuhq11@mails.tsinghua.edu.cn>
Signed-off-by: NRoger Luethi <rl@hellgate.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

In generic, after an assignment, we use ';' instead of ','.
Although, it won't hurt.
Signed-off-by: NWang Weidong <wangweidong1@huawei.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Replace the bh safe variant with the hard irq safe variant.

We need a hard irq safe variant to deal with netpoll transmitting
packets from hard irq context, and we need it in most if not all of
the places using the bh safe variant.

Except on 32bit uni-processor the code is exactly the same so don't
bother with a bh variant, just have a hard irq safe variant that
everyone can use.
Signed-off-by: N"Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

rhine_reset_task() misses to disable the tx scheduler upon reset,
this can lead to a crash if work is still scheduled while we're resetting
the tx queue.

Fixes:
[   93.591707] BUG: unable to handle kernel NULL pointer dereference at 0000004c
[   93.595514] IP: [<c119d10d>] rhine_napipoll+0x491/0x6
Signed-off-by: NRichard Weinberger <richard@nod.at>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

2fdac010 ("via-velocity.c: update napi
implementation") overlooked an irq disabling spinlock when the Rx part
of the NAPI poll handler was converted from netif_rx to netif_receive_skb.

NAPI Rx processing can be taken out of the locked section with a pair of
napi_{disable / enable} since it only races with the MTU change function.

An heavier rework of the NAPI locking would be able to perform NAPI Tx
before Rx where I simply removed one of velocity_tx_srv calls.

References: https://bugzilla.redhat.com/show_bug.cgi?id=1022733
Fixes: 2fdac010 (via-velocity.c: update napi implementation)
Signed-off-by: NFrancois Romieu <romieu@fr.zoreil.com>
Tested-by: NAlex A. Schmidt <aaschmidt1@gmail.com>
Cc: Jamie Heilman <jamie@audible.transient.net>
Cc: Michele Baldessari <michele@acksyn.org>
Cc: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

In order to enable lockdep on seqcount/seqlock structures, we
must explicitly initialize any locks.

The u64_stats_sync structure, uses a seqcount, and thus we need
to introduce a u64_stats_init() function and use it to initialize
the structure.

This unfortunately adds a lot of fairly trivial initialization code
to a number of drivers. But the benefit of ensuring correctness makes
this worth while.

Because these changes are required for lockdep to be enabled, and the
changes are quite trivial, I've not yet split this patch out into 30-some
separate patches, as I figured it would be better to get the various
maintainers thoughts on how to best merge this change along with
the seqcount lockdep enablement.

Feedback would be appreciated!
Signed-off-by: NJohn Stultz <john.stultz@linaro.org>
Acked-by: NJulian Anastasov <ja@ssi.bg>
Signed-off-by: NPeter Zijlstra <peterz@infradead.org>
Cc: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>
Cc: James Morris <jmorris@namei.org>
Cc: Jesse Gross <jesse@nicira.com>
Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Mirko Lindner <mlindner@marvell.com>
Cc: Patrick McHardy <kaber@trash.net>
Cc: Roger Luethi <rl@hellgate.ch>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Simon Horman <horms@verge.net.au>
Cc: Stephen Hemminger <stephen@networkplumber.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Wensong Zhang <wensong@linux-vs.org>
Cc: netdev@vger.kernel.org
Link: http://lkml.kernel.org/r/1381186321-4906-2-git-send-email-john.stultz@linaro.orgSigned-off-by: NIngo Molnar <mingo@kernel.org>

The driver core clears the driver data to NULL after device_release
or on probe failure. Thus, it is not needed to manually clear the
device driver data to NULL.
Signed-off-by: NJingoo Han <jg1.han@samsung.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Outgoing packets sent by via-rhine have their VLAN PCP field off by one
(when hardware acceleration is enabled). The TX descriptor expects only VID
and PCP (without a CFI/DEI bit).

Peter Boström noticed and reported the bug.
Signed-off-by: NRoger Luethi <rl@hellgate.ch>
Cc: Peter Boström <peter.bostrom@netrounds.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Drivers supporting NAPI should use a NAPI-specific function for receiving
packets.  Hence netif_rx is changed to netif_receive_skb.

Furthermore netif_napi_del should be used in the probe and remove function
to clean up the NAPI resource information.

Thanks to Francois Romieu, David Shwatrz and Rami Rosen for their help on
this patch.
Signed-off-by: NJulia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

__initdata should be placed between the variable name and equal
sign for the variable to be placed in the intended section.
Signed-off-by: NSachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add poll controller function for velocity nic.
Signed-off-by: NAmit Uttamchandani <auttamchandani@logicube.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

this bug:
https://bugzilla.redhat.com/show_bug.cgi?id=951695

Reported a dma debug backtrace:

WARNING: at lib/dma-debug.c:937 check_unmap+0x47d/0x930()
Hardware name: To Be Filled By O.E.M.
via-rhine 0000:00:12.0: DMA-API: device driver failed to check map error[device
address=0x0000000075a837b2] [size=90 bytes] [mapped as single]
Modules linked in: ip6_tables gspca_spca561 gspca_main videodev media
snd_hda_codec_realtek snd_hda_intel i2c_viapro snd_hda_codec snd_hwdep snd_seq
ppdev mperf via_rhine coretemp snd_pcm mii microcode snd_page_alloc snd_timer
snd_mpu401 snd_mpu401_uart snd_rawmidi snd_seq_device snd soundcore parport_pc
parport shpchp ata_generic pata_acpi radeon i2c_algo_bit drm_kms_helper ttm drm
pata_via sata_via i2c_core uinput
Pid: 295, comm: systemd-journal Not tainted 3.9.0-0.rc6.git2.1.fc20.x86_64 #1
Call Trace:
 <IRQ>  [<ffffffff81068dd0>] warn_slowpath_common+0x70/0xa0
 [<ffffffff81068e4c>] warn_slowpath_fmt+0x4c/0x50
 [<ffffffff8137ec6d>] check_unmap+0x47d/0x930
 [<ffffffff810ace9f>] ? local_clock+0x5f/0x70
 [<ffffffff8137f17f>] debug_dma_unmap_page+0x5f/0x70
 [<ffffffffa0225edc>] ? rhine_ack_events.isra.14+0x3c/0x50 [via_rhine]
 [<ffffffffa02275f8>] rhine_napipoll+0x1d8/0xd80 [via_rhine]
 [<ffffffff815d3d51>] ? net_rx_action+0xa1/0x380
 [<ffffffff815d3e22>] net_rx_action+0x172/0x380
 [<ffffffff8107345f>] __do_softirq+0xff/0x400
 [<ffffffff81073925>] irq_exit+0xb5/0xc0
 [<ffffffff81724cd6>] do_IRQ+0x56/0xc0
 [<ffffffff81719ff2>] common_interrupt+0x72/0x72
 <EOI>  [<ffffffff8170ff57>] ? __slab_alloc+0x4c2/0x526
 [<ffffffff811992e0>] ? mmap_region+0x2b0/0x5a0
 [<ffffffff810d5807>] ? __lock_is_held+0x57/0x80
 [<ffffffff811992e0>] ? mmap_region+0x2b0/0x5a0
 [<ffffffff811bf1bf>] kmem_cache_alloc+0x2df/0x360
 [<ffffffff811992e0>] mmap_region+0x2b0/0x5a0
 [<ffffffff811998e6>] do_mmap_pgoff+0x316/0x3d0
 [<ffffffff81183ca0>] vm_mmap_pgoff+0x90/0xc0
 [<ffffffff81197d6c>] sys_mmap_pgoff+0x4c/0x190
 [<ffffffff81367d7e>] ? trace_hardirqs_on_thunk+0x3a/0x3f
 [<ffffffff8101eb42>] sys_mmap+0x22/0x30
 [<ffffffff81722fd9>] system_call_fastpath+0x16/0x1b

Usual problem with the usual fix, add the appropriate calls to dma_mapping_error
where appropriate

Untested, as I don't have hardware, but its pretty straightforward
Signed-off-by: NNeil Horman <nhorman@tuxdriver.com>
CC: David S. Miller <davem@davemloft.net>
CC: Roger Luethi <rl@hellgate.ch>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Use standard PM state macros PCI_Dx instead of numeric 0/1/2..
Signed-off-by: NYijing Wang <wangyijing@huawei.com>
Cc: netdev@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

All drivers that select MII also need to select NET_CORE because MII
depends on it.  This is a bit ridiculous because NET_CORE is just a
menu option that doesn't enable any code by itself.

There is also no need for it to be a visible option, since its users
all select it.
Signed-off-by: NBen Hutchings <ben@decadent.org.uk>
Acked-by: NJeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add support for the VIA Velocity network driver to be bound to a
OF created platform device.
Signed-off-by: NTony Prisk <linux@prisktech.co.nz>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Remove the pci_* dma functions and replace with the more generic
versions.

In preparation of adding platform support, a new struct device *dev
is added to struct velocity_info which can be used by both the pci
and platform code.
Signed-off-by: NTony Prisk <linux@prisktech.co.nz>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Improve the clarity of the code in preparation for converting the
dma functions to generic versions, which require a struct device *.

This makes it possible to store a 'struct device *dev' in the
velocity_info structure.
Signed-off-by: NTony Prisk <linux@prisktech.co.nz>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Add a protocol argument to the VLAN packet tagging functions. In case of HW
tagging, we need that protocol available in the ndo_start_xmit functions,
so it is stored in a new field in the skb. The new field fits into a hole
(on 64 bit) and doesn't increase the sks's size.
Signed-off-by: NPatrick McHardy <kaber@trash.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Change the rx_{add,kill}_vid callbacks to take a protocol argument in
preparation of 802.1ad support. The protocol argument used so far is
always htons(ETH_P_8021Q).
Signed-off-by: NPatrick McHardy <kaber@trash.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Rename the hardware VLAN acceleration features to include "CTAG" to indicate
that they only support CTAGs. Follow up patches will introduce 802.1ad
server provider tagging (STAGs) and require the distinction for hardware not
supporting acclerating both.
Signed-off-by: NPatrick McHardy <kaber@trash.net>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

1) rhine_tx() should use dev_kfree_skb() not dev_kfree_skb_irq()

2) rhine_slow_event_task's NAPI triggering logic is racey, it
   should just hit the interrupt mask register.  This is the
   same as commit 7dbb4918
   ("r8169: avoid NAPI scheduling delay.") made to fix the same
   problem in the r8169 driver.  From Francois Romieu.
Reported-by: NJamie Gloudon <jamie.gloudon@gmail.com>
Tested-by: NJamie Gloudon <jamie.gloudon@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Switch to use ndo_get_stats64 to get 64bit statistics.
Signed-off-by: NJamie Gloudon <jamie.gloudon@gmail.com>
Tested-by: NJamie Gloudon <jamie.gloudon@gmail.com>
Acked-by: NEric Dumazet <edumazet@google.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

perm_addr is initialized correctly in register_netdevice() so to init it in
drivers is no longer needed.
Signed-off-by: NJiri Pirko <jiri@resnulli.us>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

The __dev* removal patches for the network drivers ended up messing up
the function prototypes for a bunch of drivers.  This patch fixes all of
them back up to be properly aligned.

Bonus is that this almost removes 100 lines of code, always a nice
surprise.
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

CONFIG_HOTPLUG is going away as an option.  As result the __dev*
markings will be going away.

Remove use of __devinit, __devexit_p, __devinitdata, __devinitconst,
and __devexit.
Signed-off-by: NBill Pemberton <wfp5p@virginia.edu>
Cc: Francois Romieu <romieu@fr.zoreil.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

CONFIG_HOTPLUG is going away as an option.  As result the __dev*
markings will be going away.

Remove use of __devinit, __devexit_p, __devinitdata, __devinitconst,
and __devexit.
Signed-off-by: NBill Pemberton <wfp5p@virginia.edu>
Cc: Roger Luethi <rl@hellgate.ch>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>