This improves performance when doing concurrent rx/tx on a single
ethernet MAC, e.g. when routing between VLANs.
Fixes#13072
Signed-off-by: Felix Fietkau <nbd@openwrt.org>
SVN-Revision: 42328
The r39147 commit introduces a regression: at lease on some routers
with ar8216 switch large packets get lost if 802.1q tagged port is
used on the interface connected to the aforementioned switch.
The r39147 changes code in the way so interface is set to accept
packets no longer than max ethernet frame length for a given mtu.
Unfortunately ar8216 has a feature: it sends two additional bytes
as a packet header and those this header needs to be added to the
max frame length. Otherwise long enough packets get lost.
The problem only manuifests itself if interface is used in vlan
tagged mode. If interface is untagged then ar8216's header fits
into space used by 802.1q tag and not packets are lost.
Include two additional bytes in the max frame length calculation
to fix the issue.
This patch is tested and works with Trendnet TEW-632BRP.
Signed-off-by Nikolay Martynov <mar.kolya@gmail.com>
Patchwork: http://patchwork.openwrt.org/patch/4656/
[juhosg:
- simplify the patch to include the additional bytes of the
switch header unconditionally,
- change subject and update commit message]
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 39219
The currently used bitmask of the maximum frame length field
is wrong for both models. On AR724x/AR933x the largest frame
size is 2047 bytes, on the AR934x it is 16383 bytes.
Make the MTU setup code model specific, and use the correct
bitmask for both models. Also change the value to the maximum.
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 39148
Set the MAX_FRAME_LEN register to zero in ag71xx_hw_init()
and write the correct value into that from the ag71xx_open()
and ag71xx_fast_reset() functions.
Also recalculate the RX buffer size based on the actual
maximum frame length value to optimize memory allocation.
Additionaly, disallow to change the MTU value while the
interface it running.
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 39147
The currently used bitmask is not correct for all SoCs.
Introduce a new field in struct ag71xx and store the
bitmask in that. Use the current value for now, it will
be adjusted for each SoCs in further patches.
Aslo use the new field directly in the ag71xx_rx_packets
and ag71xx_hard_start_xmit() functions and remove the
ag71xx_desc_pktlen() helper.
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 39144
This enables us to add fixups to the board specific code for boards that
require special treatment of PHYs on mdio bus reset.
Signed-off-by: Felix Kaechele <heffer@fedoraproject.org>
http://patchwork.openwrt.org/patch/4614/
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 39127
Currently, the AG71XX_RX_PKT_SIZE value limits the received
frame size to 1514/1516 bytes with/without a VLAN header
respectively. However the hardware limit is controlled by
the value the AG71XX_REG_MAC_MFL register which contains
the value of the max_frame_len field.
Compute the RX buffer size from the max_frame_len field
to get rid of the 1514/1516 byte limitation. Also remove
the unused AG71XX_RX_PKT_SIZE definition.
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 39121
The ar7240_probe function uses the network device name
in the kernel log messages, however the name is not yet
initialized when the ar7240_probe function is called.
Use the mdio bus name in the messages to avoid ugly
log lines like the following one:
eth%d: Found an AR7240/AR9330 built-in switch
Reported-by: Ronald Wahl <ronald.wahl@raritan.com>
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 39116
The ag71xx debugfs code uses the network device name
for the device specific debugfs directory. Since r38689
'ar71xx: ag71xx: fix a race involving netdev registration'
the debugfs initialization happens before the ethernet
device gets registered and the network device name contains
'eth%d' at this point. If the board setup code registers
multiple ag71xx devices, the debugfs code tries to create
the device specific dir with the same name which causes
an error like this:
eth0: Atheros AG71xx at 0xba000000, irq 5, mode:GMII
ag71xx ag71xx.0: connected to PHY at ag71xx-mdio.1:04 [uid=004dd041, driver=Generic PHY]
ag71xx: probe of ag71xx.0 failed with error -12
Use the device name for the debugfs directory to avoid the
collisions. Also add an error message and change the return
code if the debugfs_create_dir call fails.
Reported-by: Ronald Wahl <ronald.wahl@raritan.com>
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 39115
In particular, phy_connect before register_netdev. This is because
register_netdev runs the netdev notifiers, which can race with the rest of
the initialization in ag71xx_probe. In my case this manifested in two ways:
1) If ag71xx is compiled as a module and inserted after netifd has started,
netifd is notified by register_netdev before the call to
ag71xx_phy_connect. netifd tries to bring the interface up, which calls
ag71xx_open, which in turn enters ag71xx_phy_start. This keys off
ag->phy_dev (which is still NULL) and thinks this is a fixed-link board,
and enters ag71xx_link_adjust. This looks at ag->speed which is not yet
initialized and hits the BUG() in the switch (ag->speed) in
ag71xx_link_adjust.
This is the wrong code path for ag71xx_phy_start - my board has PHYs that
need to be brought up with phy_start. Doing ag71xx_phy_connect before
register_netdev ensures that ag->phy_dev is non-NULL before
ag71xx_phy_start is ever called.
2) When ag71xx is built into the kernel, and netconsole is enabled, there
is a gap in the initial burst of replayed printks right after the netdev
comes up. My assumption is that netconsole is also triggered by a netdev
notifier, and part of this printk burst happens before the call into
ag71xx_phy_connect, so part of the burst is lost while the PHY comes up.
This patch fixes the gap - all the printks before eth0 comes up are bursted
in full when netconsole initializes.
ag71xx_phy_connect_xxx no longer runs with a registered netdev, so the
logging has been adjusted accordingly to avoid "unregistered net_device" or
"eth%d" messages in dmesg.
Signed-off-by: Catalin Patulea <cat@vv.carleton.ca>
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 38689
The mii_bus device is not required if phy_mask is zero.
The driver will use a fixed connection if it is not
specified.
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 34849
A fast stop/start cycle could leave the ag71xx interrupts and tx engine
disabled when using a phy driver with a fixed link and the start/stop
happens between two phy state machine polls.
Prevent this by always forcing the link down on stop regardless of phy
state and having a phy connected.
SVN-Revision: 28380
When starting/stopping DMA sometimes the FIFO state gets corrupted,
leading to wildly fluctuating latencies or packet data corruption.
Fix this by issuing a fast MAC reset as soon as the link is detected
as up. Fixes#9689, #9405
SVN-Revision: 27896
When the DMA engine state gets corrupted due to a hardware issues, it
often won't stop rx until a full reset is issued. In that case the hardware
must keep a valid descriptor, otherwise it will write to random places in
system RAM, triggering random crashes. To fix this, keep a dummy descriptor
without a buffer that keeps the DMA engine in a sane state until the reset
is done
SVN-Revision: 27895
