Commit Graph

133 Commits

Author SHA1 Message Date
Petr Štetiar
a51645f70f net: ethernet: support of_get_mac_address new ERR_PTR error
There was NVMEM support added to of_get_mac_address, so it could now
return ERR_PTR encoded error values, so we need to adjust all current
users of of_get_mac_address to this new fact.

While at it, remove superfluous is_valid_ether_addr as the MAC address
returned from of_get_mac_address is always valid and checked by
is_valid_ether_addr anyway.

Fixes: d01f449c00 ("of_net: add NVMEM support to of_get_mac_address")
Signed-off-by: Petr Štetiar <ynezz@true.cz>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-05-07 12:22:47 -07:00
Florian Westphal
6b16f9ee89 net: move skb->xmit_more hint to softnet data
There are two reasons for this.

First, the xmit_more flag conceptually doesn't fit into the skb, as
xmit_more is not a property related to the skb.
Its only a hint to the driver that the stack is about to transmit another
packet immediately.

Second, it was only done this way to not have to pass another argument
to ndo_start_xmit().

We can place xmit_more in the softnet data, next to the device recursion.
The recursion counter is already written to on each transmit. The "more"
indicator is placed right next to it.

Drivers can use the netdev_xmit_more() helper instead of skb->xmit_more
to check the "more packets coming" hint.

skb->xmit_more is retained (but always 0) to not cause build breakage.

This change takes care of the simple s/skb->xmit_more/netdev_xmit_more()/
conversions.  Remaining drivers are converted in the next patches.

Suggested-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-04-01 18:35:02 -07:00
YueHaibing
f819cd926c drivers: net: Remove unnecessary semicolon
drivers/net/dsa/mt7530.c:649:3-4: Unneeded semicolon
drivers/net/ethernet/cisco/enic/enic_clsf.c:35:2-3: Unneeded semicolon
drivers/net/ethernet/faraday/ftgmac100.c:1640:2-3: Unneeded semicolon
drivers/net/ethernet/mediatek/mtk_eth_soc.c:229:2-3: Unneeded semicolon
drivers/net/usb/sr9700.c:437:2-3: Unneeded semicolon

Remove unneeded semicolon.

Generated by: scripts/coccinelle/misc/semicolon.cocci

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Acked-by: Sean Wang <sean.wang@mediatek.com> for mt7530 and mtk_eth_soc
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-03-01 23:13:49 -08:00
Bjørn Mork
889bcbdeee net: ethernet: mediatek: support MT7621 SoC ethernet hardware
The Mediatek MT7621 SoC contains the same ethernet hardware module as
used on a number of other MediaTek SoC parts. There are some minor
differences to deal with but we can use the same driver to support
them all.

This patch is based on work by Bjørn Mork <bjorn@mork.no>, and his
original patch is at:

3293bc63f5

There is an additional compatible devicetree type added, and the primary
change to the code required is to support a single interrupt (for both
RX and TX interrupts).

Signed-off-by: Bjørn Mork <bjorn@mork.no>
[gerg@kernel.org: rebase to mainline and irq handler fix]
Signed-off-by: Greg Ungerer <gerg@kernel.org>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Acked-by: Sean Wang <sean.wang@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-01-30 14:26:07 -08:00
Linus Torvalds
e8746440bf Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Pull networking fixes from David Miller:

 1) Fix regression in multi-SKB responses to RTM_GETADDR, from Arthur
    Gautier.

 2) Fix ipv6 frag parsing in openvswitch, from Yi-Hung Wei.

 3) Unbounded recursion in ipv4 and ipv6 GUE tunnels, from Stefano
    Brivio.

 4) Use after free in hns driver, from Yonglong Liu.

 5) icmp6_send() needs to handle the case of NULL skb, from Eric
    Dumazet.

 6) Missing rcu read lock in __inet6_bind() when operating on mapped
    addresses, from David Ahern.

 7) Memory leak in tipc-nl_compat_publ_dump(), from Gustavo A. R. Silva.

 8) Fix PHY vs r8169 module loading ordering issues, from Heiner
    Kallweit.

 9) Fix bridge vlan memory leak, from Ido Schimmel.

10) Dev refcount leak in AF_PACKET, from Jason Gunthorpe.

11) Infoleak in ipv6_local_error(), flow label isn't completely
    initialized. From Eric Dumazet.

12) Handle mv88e6390 errata, from Andrew Lunn.

13) Making vhost/vsock CID hashing consistent, from Zha Bin.

14) Fix lack of UMH cleanup when it unexpectedly exits, from Taehee Yoo.

15) Bridge forwarding must clear skb->tstamp, from Paolo Abeni.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (87 commits)
  bnxt_en: Fix context memory allocation.
  bnxt_en: Fix ring checking logic on 57500 chips.
  mISDN: hfcsusb: Use struct_size() in kzalloc()
  net: clear skb->tstamp in bridge forwarding path
  net: bpfilter: disallow to remove bpfilter module while being used
  net: bpfilter: restart bpfilter_umh when error occurred
  net: bpfilter: use cleanup callback to release umh_info
  umh: add exit routine for UMH process
  isdn: i4l: isdn_tty: Fix some concurrency double-free bugs
  vhost/vsock: fix vhost vsock cid hashing inconsistent
  net: stmmac: Prevent RX starvation in stmmac_napi_poll()
  net: stmmac: Fix the logic of checking if RX Watchdog must be enabled
  net: stmmac: Check if CBS is supported before configuring
  net: stmmac: dwxgmac2: Only clear interrupts that are active
  net: stmmac: Fix PCI module removal leak
  tools/bpf: fix bpftool map dump with bitfields
  tools/bpf: test btf bitfield with >=256 struct member offset
  bpf: fix bpffs bitfield pretty print
  net: ethernet: mediatek: fix warning in phy_start_aneg
  tcp: change txhash on SYN-data timeout
  ...
2019-01-16 05:13:36 +12:00
Heiner Kallweit
b19bce0335 net: ethernet: mediatek: fix warning in phy_start_aneg
linux 5.0-rc1 shows following warning on bpi-r2/mt7623 bootup:

[ 5.170597] WARNING: CPU: 3 PID: 1 at drivers/net/phy/phy.c:548 phy_start_aneg+0x110/0x144
[ 5.178826] called from state READY
....
[ 5.264111] [<c0629fd4>] (phy_start_aneg) from [<c0e3e720>] (mtk_init+0x414/0x47c)
[ 5.271630] r7:df5f5eec r6:c0f08c48 r5:00000000 r4:dea67800
[ 5.277256] [<c0e3e30c>] (mtk_init) from [<c07dabbc>] (register_netdevice+0x98/0x51c)
[ 5.285035] r8:00000000 r7:00000000 r6:c0f97080 r5:c0f08c48 r4:dea67800
[ 5.291693] [<c07dab24>] (register_netdevice) from [<c07db06c>] (register_netdev+0x2c/0x44)
[ 5.299989] r8:00000000 r7:dea2e608 r6:deacea00 r5:dea2e604 r4:dea67800
[ 5.306646] [<c07db040>] (register_netdev) from [<c06326d8>] (mtk_probe+0x668/0x7ac)
[ 5.314336] r5:dea2e604 r4:dea2e040
[ 5.317890] [<c0632070>] (mtk_probe) from [<c05a78fc>] (platform_drv_probe+0x58/0xa8)
[ 5.325670] r10:c0f86bac r9:00000000 r8:c0fbe578 r7:00000000 r6:c0f86bac r5:00000000
[ 5.333445] r4:deacea10
[ 5.335963] [<c05a78a4>] (platform_drv_probe) from [<c05a5248>] (really_probe+0x2d8/0x424)

maybe other boards using this generic driver are affected

v2:
optimization:

- phy_set_max_speed() is only needed if you want to reduce the
  max speed, typically if the PHY supports 1Gbps but the MAC
  supports 100Mbps only.

- The pause parameters are autonegotiated. Except you have a specific
  need you normally don't need to manually fiddle with this.

- phy_start_aneg() is called implicitly by the phylib state machine,
  you shouldn't call it manually except you have a good excuse.

- netif_carrier_on/netif_carrier_off in mtk_phy_link_adjust() isn't
  needed. It's done by phy_link_change() in phylib.

Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
Reviewed-by: Heiner Kallweit <hkallweit1@gmail.com>
Acked-by: Sean Wang <sean.wang@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-01-10 16:57:24 -05:00
Luis Chamberlain
750afb08ca cross-tree: phase out dma_zalloc_coherent()
We already need to zero out memory for dma_alloc_coherent(), as such
using dma_zalloc_coherent() is superflous. Phase it out.

This change was generated with the following Coccinelle SmPL patch:

@ replace_dma_zalloc_coherent @
expression dev, size, data, handle, flags;
@@

-dma_zalloc_coherent(dev, size, handle, flags)
+dma_alloc_coherent(dev, size, handle, flags)

Suggested-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
[hch: re-ran the script on the latest tree]
Signed-off-by: Christoph Hellwig <hch@lst.de>
2019-01-08 07:58:37 -05:00
Andrew Lunn
3c1bcc8614 net: ethernet: Convert phydev advertize and supported from u32 to link mode
There are a few MAC/PHYs combinations which now support > 1Gbps. These
may need to make use of link modes with bits > 31. Thus their
supported PHY features or advertised features cannot be implemented
using the current bitmap in a u32. Convert to using a linkmode bitmap,
which can support all the currently devices link modes, and is future
proof as more modes are added.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-11-11 10:10:01 -08:00
Andrew Lunn
5f991f7bdd net: phy: Add helper for advertise to lcl value
Add a helper to convert the local advertising to an LCL capabilities,
which is then used to resolve pause flow control settings.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Maxime Chevallier <maxime.chevallier@bootlin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-10-01 22:55:36 -07:00
Andrew Lunn
af8d9bb2f2 net: ethernet: Add helper for MACs which support asym pause
Rather than have the MAC drivers manipulate phydev members to indicate
they support Asym Pause, add a helper function.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-12 20:24:21 -07:00
Andrew Lunn
04b7d41d80 net: ethernet: Fix up drivers masking pause support
PHY drivers don't indicate they support pause. They expect MAC drivers
to enable its support if the MAC has the needed hardware. Thus MAC
drivers should not mask Pause support, but enable it.

Change a few ANDs to ORs.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-12 20:24:21 -07:00
Andrew Lunn
58056c1e1b net: ethernet: Use phy_set_max_speed() to limit advertised speed
Many Ethernet MAC drivers want to limit the PHY to only advertise a
maximum speed of 100Mbs or 1Gbps. Rather than using a mask, make use
of the helper function phy_set_max_speed().

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-09-12 20:24:20 -07:00
Rob Herring
21c328dcec net: ethernet: Convert to using %pOFn instead of device_node.name
In preparation to remove the node name pointer from struct device_node,
convert printf users to use the %pOFn format specifier.

Cc: "David S. Miller" <davem@davemloft.net>
Cc: Yisen Zhuang <yisen.zhuang@huawei.com>
Cc: Salil Mehta <salil.mehta@huawei.com>
Cc: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Cc: Felix Fietkau <nbd@openwrt.org>
Cc: John Crispin <john@phrozen.org>
Cc: Sean Wang <sean.wang@mediatek.com>
Cc: Nelson Chang <nelson.chang@mediatek.com>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Cc: Wingman Kwok <w-kwok2@ti.com>
Cc: Murali Karicheri <m-karicheri2@ti.com>
Cc: netdev@vger.kernel.org

Signed-off-by: Rob Herring <robh@kernel.org>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Acked-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-08-29 19:41:30 -07:00
Sean Wang
2d14ba7228 net-next: mediatek: cleanup unnecessary get chip id and its user
Since driver is devicetree-based, all device type and charateristic can be
determined by the compatible string and its data. It's unnecessary to
create another dependent function to check chip ID and then decide whether
the specific funciton is being supported on a certain device. It can be
totally replaced by the existing flag, so a cleanup is made by removing
the function and the only user, HWLRO.

MT2701 also have a missing HWLRO support in old code, so add it the same
patch.

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-07-29 13:15:57 -07:00
Sean Wang
6c21da204a net-next: mediatek: improve more with using dma_zalloc_coherent
Improve more in the existing code by reusing dma_zalloc_coherent instead
of dma_alloc_coherent with __GFP_ZERO or superfluous zeroing buffer.

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-07-29 13:15:57 -07:00
YueHaibing
0a78c3803d net: mediatek: use dma_zalloc_coherent instead of allocator/memset
Use dma_zalloc_coherent instead of dma_alloc_coherent
followed by memset 0.

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-07-22 20:51:40 -07:00
Ryder Lee
eda7d46da4 net: mediatek: use of_device_get_match_data()
The usage of of_device_get_match_data() reduce the code size a bit.

Also, the only way to call mtk_probe() is to match an entry in
of_mtk_match[], so match cannot be NULL.

Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2018-04-16 13:43:07 -04:00
Thierry Reding
140995c976 net: mediatek: Explicitly include pinctrl headers
The Mediatek ethernet driver fails to build after commit 23c35f48f5
("pinctrl: remove include file from <linux/device.h>") because it relies
on the pinctrl/consumer.h and pinctrl/devinfo.h being pulled in by the
device.h header implicitly.

Include these headers explicitly to avoid the build failure.

Cc: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-02-05 09:41:54 -08:00
Sean Wang
243dc5fb46 net: mediatek: remove superfluous pin setup for MT7622 SoC
Remove superfluous pin setup to get out of accessing invalid I/O pin
registers because the way for pin configuring tends to be different from
various SoCs and thus it should be better being managed and controlled by
the pinctrl driver which MT7622 already can support.

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-12-26 12:05:46 -05:00
Sean Wang
7352e252b5 net: mediatek: setup proper state for disabled GMAC on the default
The current solution would setup fixed and force link of 1Gbps to the both
GMAC on the default. However, The GMAC should always be put to link down
state when the GMAC is disabled on certain target boards. Otherwise,
the driver possibly receives unexpected data from the floating hardware
connection through the unused GMAC. Although the driver had been added
certain protection in RX path to get rid of such kind of unexpected data
sent to the upper stack.

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-12-19 13:18:31 -05:00
Elena Reshetova
c6d4e63e06 drivers, net, ethernet: convert mtk_eth.dma_refcnt from atomic_t to refcount_t
atomic_t variables are currently used to implement reference
counters with the following properties:
 - counter is initialized to 1 using atomic_set()
 - a resource is freed upon counter reaching zero
 - once counter reaches zero, its further
   increments aren't allowed
 - counter schema uses basic atomic operations
   (set, inc, inc_not_zero, dec_and_test, etc.)

Such atomic variables should be converted to a newly provided
refcount_t type and API that prevents accidental counter overflows
and underflows. This is important since overflows and underflows
can lead to use-after-free situation and be exploitable.

The variable mtk_eth.dma_refcnt is used as pure reference counter.
Convert it to refcount_t and fix up the operations.

Suggested-by: Kees Cook <keescook@chromium.org>
Reviewed-by: David Windsor <dwindsor@gmail.com>
Reviewed-by: Hans Liljestrand <ishkamiel@gmail.com>
Signed-off-by: Elena Reshetova <elena.reshetova@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-10-22 02:22:38 +01:00
John Crispin
6427dc1da5 net-next: mediatek: bring up QDMA RX ring 0
This patch is in preparation for adding HW flow and QoS offloading. For
those features to work, the driver needs to bring up the first QDMA RX
ring. This ring is used by the PPE offloading HW.

Signed-off-by: John Crisp in <john@phrozen.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-09 22:45:36 -07:00
Sean Wang
42c03844e9 net-next: mediatek: add support for MediaTek MT7622 SoC
This patch adds the driver for ethernet controller on MT7622 SoC. It has
the similar handling logic as the previously MT7623 does, but there are
additions against with MT7623 SoC, the shared SGMII given for the dual
GMACs and including 5-ports 10/100 embedded switch support (ESW) as the
GMAC1 option, thus more clocks consumers for the extra feature are
introduced here. So for ease portability and maintenance, those
differences all are being kept inside the platform data as other drivers
usually do. Currently testing successfully is done with those patches for
the conditions such as GMAC2 with IP1001 PHY via RGMII and GMAC1/2 with
RTL8211F PHY via SGMII.

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-01 15:51:48 -07:00
Sean Wang
2ec50f574e net-next: mediatek: add platform data to adapt into various hardware
This patch is the preparation patch in order to adapt into various
hardware through adding platform data which holds specific characteristics
among MediaTek SoCs and introducing the unified clock handler for those
distinct clock requirements depending on different features such as
TRGMII and SGMII getting support on the target SoC. And finally, add
enhancement with given the generic description for Kconfig and remove the
unnecessary machine type dependency in Makefile.

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-01 15:51:48 -07:00
David S. Miller
29fda25a2d Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Two minor conflicts in virtio_net driver (bug fix overlapping addition
of a helper) and MAINTAINERS (new driver edit overlapping revamp of
PHY entry).

Signed-off-by: David S. Miller <davem@davemloft.net>
2017-08-01 10:07:50 -07:00
Mark Brown
70dba204a3 net: ethernet: mediatek: Explicitly include linux/interrupt.h
The mediatek ethernet driver uses interrupts but does not explicitly
include linux/interrupt.h, relying on implicit includes.  Fix this so we
don't get build breaks as happened for ARM in next-20170720.

Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-07-24 13:45:29 -07:00
Sean Wang
6c7fce6fa8 net: ethernet: mediatek: avoid potential invalid memory access
Potential dangerous invalid memory might be accessed if invalid mac value
reflected from the forward port field in rxd4 caused by possible potential
hardware defects. So added a simple sanity checker to avoid the kind of
situation happening.

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Acked-by: John Crispin <john@phrozen.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-07-24 13:43:23 -07:00
Gustavo A. R. Silva
f03b06f3ba net: ethernet: mediatek: remove useless code in mtk_poll_tx()
Remove useless local variable _condition_ and the code related.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Acked-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-07-19 16:33:57 -07:00
Gustavo A. R. Silva
e8df760307 net: ethernet: mediatek: remove useless code in mtk_probe()
Remove useless local variables _match_, _soc_ and the code related.

Notice that

const struct of_device_id of_mtk_match[] = {
        { .compatible = "mediatek,mt2701-eth" },
        {},
};

So match->data is NULL.

Suggested-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-07-08 11:27:55 +01:00
Sean Wang
8d32e06243 net: ethernet: mediatek: fixed deadlock captured by lockdep
Lockdep found an inconsistent lock state when mtk_get_stats64 is called
in user context while NAPI updates MAC statistics in softirq.

Use spin_trylock_bh/spin_unlock_bh fix following lockdep warning.

[   81.321030] WARNING: inconsistent lock state
[   81.325266] 4.12.0-rc1-00035-gd9dda65 #32 Not tainted
[   81.330273] --------------------------------
[   81.334505] inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage.
[   81.340464] ksoftirqd/0/7 [HC0[0]:SC1[1]:HE1:SE0] takes:
[   81.345731]  (&syncp->seq#2){+.?...}, at: [<c054ba3c>] mtk_handle_status_irq.part.6+0x70/0x84
[   81.354219] {SOFTIRQ-ON-W} state was registered at:
[   81.359062]   lock_acquire+0xfc/0x2b0
[   81.362696]   mtk_stats_update_mac+0x60/0x2c0
[   81.367017]   mtk_get_stats64+0x17c/0x18c
[   81.370995]   dev_get_stats+0x48/0xbc
[   81.374628]   rtnl_fill_stats+0x48/0x128
[   81.378520]   rtnl_fill_ifinfo+0x4ac/0xd1c
[   81.382584]   rtmsg_ifinfo_build_skb+0x7c/0xe0
[   81.386991]   rtmsg_ifinfo.part.5+0x24/0x54
[   81.391139]   rtmsg_ifinfo+0x24/0x28
[   81.394685]   __dev_notify_flags+0xa4/0xac
[   81.398749]   dev_change_flags+0x50/0x58
[   81.402640]   devinet_ioctl+0x768/0x85c
[   81.406444]   inet_ioctl+0x1a4/0x1d0
[   81.409990]   sock_ioctl+0x16c/0x33c
[   81.413538]   do_vfs_ioctl+0xb4/0xa34
[   81.417169]   SyS_ioctl+0x44/0x6c
[   81.420458]   ret_fast_syscall+0x0/0x1c
[   81.424260] irq event stamp: 3354692
[   81.427806] hardirqs last  enabled at (3354692): [<c0678168>] net_rx_action+0xc0/0x504
[   81.435660] hardirqs last disabled at (3354691): [<c0678134>] net_rx_action+0x8c/0x504
[   81.443515] softirqs last  enabled at (3354106): [<c0101944>] __do_softirq+0x4b4/0x614
[   81.451370] softirqs last disabled at (3354109): [<c012f0c4>] run_ksoftirqd+0x44/0x80
[   81.459134]
[   81.459134] other info that might help us debug this:
[   81.465608]  Possible unsafe locking scenario:
[   81.465608]
[   81.471478]        CPU0
[   81.473900]        ----
[   81.476321]   lock(&syncp->seq#2);
[   81.479701]   <Interrupt>
[   81.482294]     lock(&syncp->seq#2);
[   81.485847]
[   81.485847]  *** DEADLOCK ***
[   81.485847]
[   81.491720] 1 lock held by ksoftirqd/0/7:
[   81.495693]  #0:  (&(&mac->hw_stats->stats_lock)->rlock){+.+...}, at: [<c054ba14>] mtk_handle_status_irq.part.6+0x48/0x84
[   81.506579]
[   81.506579] stack backtrace:
[   81.510904] CPU: 0 PID: 7 Comm: ksoftirqd/0 Not tainted 4.12.0-rc1-00035-gd9dda65 #32
[   81.518668] Hardware name: Mediatek Cortex-A7 (Device Tree)
[   81.524208] [<c0113dc4>] (unwind_backtrace) from [<c010e3f0>] (show_stack+0x20/0x24)
[   81.531899] [<c010e3f0>] (show_stack) from [<c03f9c64>] (dump_stack+0xb4/0xe0)
[   81.539072] [<c03f9c64>] (dump_stack) from [<c017e970>] (print_usage_bug+0x234/0x2e0)
[   81.546846] [<c017e970>] (print_usage_bug) from [<c017f058>] (mark_lock+0x63c/0x7bc)
[   81.554532] [<c017f058>] (mark_lock) from [<c017fe90>] (__lock_acquire+0x654/0x1bfc)
[   81.562217] [<c017fe90>] (__lock_acquire) from [<c0181d04>] (lock_acquire+0xfc/0x2b0)
[   81.569990] [<c0181d04>] (lock_acquire) from [<c054b76c>] (mtk_stats_update_mac+0x60/0x2c0)
[   81.578283] [<c054b76c>] (mtk_stats_update_mac) from [<c054ba3c>] (mtk_handle_status_irq.part.6+0x70/0x84)
[   81.587865] [<c054ba3c>] (mtk_handle_status_irq.part.6) from [<c054c2b8>] (mtk_napi_tx+0x358/0x37c)
[   81.596845] [<c054c2b8>] (mtk_napi_tx) from [<c06782ec>] (net_rx_action+0x244/0x504)
[   81.604533] [<c06782ec>] (net_rx_action) from [<c01015c4>] (__do_softirq+0x134/0x614)
[   81.612306] [<c01015c4>] (__do_softirq) from [<c012f0c4>] (run_ksoftirqd+0x44/0x80)
[   81.619907] [<c012f0c4>] (run_ksoftirqd) from [<c0154680>] (smpboot_thread_fn+0x14c/0x25c)
[   81.628110] [<c0154680>] (smpboot_thread_fn) from [<c014f8cc>] (kthread+0x150/0x180)
[   81.635798] [<c014f8cc>] (kthread) from [<c0109290>] (ret_from_fork+0x14/0x24)

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-07-04 01:43:38 -07:00
John Crispin
a2d5e7b410 net-next: mediatek: set the rx_queue to 0
The get_rps_cpu() function will not do any RPS on the data flow when no
queue is setup and always use the current cpu where the IRQ was handled
to also handle the backlog. As we only have one physical queue we always
set this to 0 unconditionally.

Signed-off-by: John Crispin <john@phrozen.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-06-20 13:40:35 -04:00
John Crispin
5cce0322cf net-next: mediatek: split IRQ register locking into TX and RX
Originally the driver only utilised the new QDMA engine. The current code
still assumes this is the case when locking the IRQ mask register. Since
RX now runs on the old style PDMA engine we can add a second lock. This
patch reduces the IRQ latency as the TX and RX path no longer need to wait
on each other under heavy load.

Signed-off-by: John Crispin <john@phrozen.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-06-20 13:40:35 -04:00
John Crispin
671d41e60d net-next: mediatek: add RX IRQ delay support
The PDMA engine used for RX allows IRQ aggregation. The patch sets up the
corresponding registers to aggregate 4 IRQs into one. Using aggregation
reduces the load on the core handling to a quarter thus reducing IRQ
latency and increasing RX performance by around 10%.

Signed-off-by: John Crispin <john@phrozen.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-06-20 13:40:34 -04:00
John Crispin
5969c42768 net-next: mediatek: print phy status changes for non DSA GMACs
Currently PHY status changes are only printed for DSA ports. This patch
adds code to also print status changes for non-fixed links.

Signed-off-by: John Crispin <john@phrozen.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-06-20 13:40:34 -04:00
yuval.shaia@oracle.com
5514174fe9 net: phy: Make phy_ethtool_ksettings_get return void
Make return value void since function never return meaningfull value

Signed-off-by: Yuval Shaia <yuval.shaia@oracle.com>
Acked-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-06-13 12:59:06 -04:00
David S. Miller
7b9f6da175 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
A function in kernel/bpf/syscall.c which got a bug fix in 'net'
was moved to kernel/bpf/verifier.c in 'net-next'.

Signed-off-by: David S. Miller <davem@davemloft.net>
2017-04-20 10:35:33 -04:00
Sean Wang
134d21525f net: ethernet: mediatek: fix inconsistency of port number carried in TXD
Fix port inconsistency on TXD due to hardware BUG that would cause
different port number is carried on the same TXD between tx_map()
and tx_unmap() with the iperf test. It would cause confusing BQL
logic which leads to kernel panic when dual GMAC runs concurrently.

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-04-17 13:33:58 -04:00
Sean Wang
81d2dd09ca net: ethernet: mediatek: fix inconsistency between TXD and the used buffer
Fix inconsistency between the TXD descriptor and the used buffer that
would cause unexpected logic at mtk_tx_unmap() during skb housekeeping.

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-04-17 13:33:58 -04:00
Sean Wang
3174b3b58c net-next: ethernet: mediatek: add device_node of GMAC pointing into the netdev instance
the patch adds the setup of the corresponding device node of GMAC into the
netdev instance which could allow other modules such as DSA to find the
instance through the node in dt-bindings using of_find_net_device_by_node()
call.

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-04-07 13:50:55 -07:00
Sean Wang
87e3df4961 net-next: ethernet: mediatek: add CDM able to recognize the tag for DSA
The patch adds the setup for allowing CDM can recognize these packets with
carrying port-distinguishing tag. Otherwise, these tagging packets will be
handled incorrectly by CDM. The setup is also working out for general
untag packets as well.

Signed-off-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: Landen Chao <Landen.Chao@mediatek.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-04-07 13:50:55 -07:00
Tobias Klauser
e3c36e483b net: mediatek: Use eth_hw_addr_random()
Use eth_hw_addr_random() to set a random dev_addr and update
addr_assign_type instead of open-coding it.

Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-03-09 13:16:34 -08:00
David S. Miller
4e8f2fc1a5 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Two trivial overlapping changes conflicts in MPLS and mlx5.

Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-28 10:33:06 -05:00
John Crispin
8b901f6bbc net-next: ethernet: mediatek: change the compatible string
When the binding was defined, I was not aware that mt2701 was an earlier
version of the SoC. For sake of consistency, the ethernet driver should
use mt2701 inside the compat string as this is the earliest SoC with the
ethernet core.

The ethernet driver is currently of no real use until we finish and
upstream the DSA driver. There are no users of this binding yet. It should
be safe to fix this now before it is too late and we need to provide
backward compatibility for the mt7623-eth compat string.

Reported-by: Sean Wang <sean.wang@mediatek.com>
Signed-off-by: John Crispin <john@phrozen.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-25 14:36:02 -05:00
stephen hemminger
bc1f44709c net: make ndo_get_stats64 a void function
The network device operation for reading statistics is only called
in one place, and it ignores the return value. Having a structure
return value is potentially confusing because some future driver could
incorrectly assume that the return value was used.

Fix all drivers with ndo_get_stats64 to have a void function.

Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-01-08 17:51:44 -05:00
David S. Miller
2745529ac7 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Couple conflicts resolved here:

1) In the MACB driver, a bug fix to properly initialize the
   RX tail pointer properly overlapped with some changes
   to support variable sized rings.

2) In XGBE we had a "CONFIG_PM" --> "CONFIG_PM_SLEEP" fix
   overlapping with a reorganization of the driver to support
   ACPI, OF, as well as PCI variants of the chip.

3) In 'net' we had several probe error path bug fixes to the
   stmmac driver, meanwhile a lot of this code was cleaned up
   and reorganized in 'net-next'.

4) The cls_flower classifier obtained a helper function in
   'net-next' called __fl_delete() and this overlapped with
   Daniel Borkamann's bug fix to use RCU for object destruction
   in 'net'.  It also overlapped with Jiri's change to guard
   the rhashtable_remove_fast() call with a check against
   tc_skip_sw().

5) In mlx4, a revert bug fix in 'net' overlapped with some
   unrelated changes in 'net-next'.

6) In geneve, a stale header pointer after pskb_expand_head()
   bug fix in 'net' overlapped with a large reorganization of
   the same code in 'net-next'.  Since the 'net-next' code no
   longer had the bug in question, there was nothing to do
   other than to simply take the 'net-next' hunks.

Signed-off-by: David S. Miller <davem@davemloft.net>
2016-12-03 12:29:53 -05:00
Johan Hovold
16a67eb3ec net: ethernet: mediatek: fix fixed-link phydev leaks
Make sure to deregister and free any fixed-link PHY registered using
of_phy_register_fixed_link() on initialisation errors and on uninit.

Fixes: 0c72c50f6f ("net-next: mediatek: add fixed-phy support")
Signed-off-by: Johan Hovold <johan@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-11-29 23:17:02 -05:00
Wei Yongjun
81ad2b7de6 net: ethernet: mediatek: use dev_kfree_skb_any instead of dev_kfree_skb
Replace dev_kfree_skb with dev_kfree_skb_any in mtk_start_xmit()
which can be called from hard irq context (netpoll) and from
other contexts. mtk_start_xmit() only frees skbs that it has
dropped.

This is detected by Coccinelle semantic patch.

Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-20 14:47:52 -04:00
Jarod Wilson
a52ad514fd net: deprecate eth_change_mtu, remove usage
With centralized MTU checking, there's nothing productive done by
eth_change_mtu that isn't already done in dev_set_mtu, so mark it as
deprecated and remove all usage of it in the kernel. All callers have been
audited for calls to alloc_etherdev* or ether_setup directly, which means
they all have a valid dev->min_mtu and dev->max_mtu. Now eth_change_mtu
prints out a netdev_warn about being deprecated, for the benefit of
out-of-tree drivers that might be utilizing it.

Of note, dvb_net.c actually had dev->mtu = 4096, while using
eth_change_mtu, meaning that if you ever tried changing it's mtu, you
couldn't set it above 1500 anymore. It's now getting dev->max_mtu also set
to 4096 to remedy that.

v2: fix up lantiq_etop, missed breakage due to drive not compiling on x86

CC: netdev@vger.kernel.org
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-13 09:36:57 -04:00
Nelson Chang
983e1a6c95 net: ethernet: mediatek: get hw lro capability by the chip id instead of by the dtsi
Because hw lro started to be supported from MT7623, the proper way to check if
the feature is capable is to judge by the chip id instead of by the dtsi.

Signed-off-by: Nelson Chang <nelson.chang@mediatek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-06 21:08:08 -04:00
Nelson Chang
b95b6d99ce net: ethernet: mediatek: get the chip id by ETHDMASYS registers
The driver gets the chip id by ETHSYS_CHIPID0_3/ETHSYS_CHIPID4_7 registers
in mtk_probe().

Signed-off-by: Nelson Chang <nelson.chang@mediatek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2016-10-06 21:08:07 -04:00