This flips on basic 11n for 2GHz/5GHz station operation.
* It flips on HT20 and MCS rates;
* It enables A-MPDU decap - the payload format is a bit different;
* It does do some basic checks for HT40 but I haven't yet flipped on
HT40 support;
* It enables software A-MSDU transmit; I honestly don't want to make
A-MPDU TX work and there are apparently issues with QoS and A-MPDU TX.
So I totally am ignoring A-MPDU TX;
* MCS rate transmit is fine.
I haven't:
* A-MPDU TX, as I said above;
* made radiotap work fully;
* HT40;
* short-GI support;
* lots of other stuff that honestly no-one is likely to use.
But! Hey, this is another ye olde 11n USB NIC that now works pretty OK
in 11n rates. A-MPDU receive seems fine enough given it's a draft-n
device from before 2010.
Tested:
* Ye olde UB82 Test NIC (AR9170 + AR9104) - 2GHz/5GHz
This change prevents a race that happens when rxsync dequeues
N-1 rx packets (with N being the size of the netmap rx ring).
In this situation, the loop exits without re-enabling the
rx interrupts, thus causing the VQ to stall.
MFC after: 1 week
The new index tracks the next netmap slot that is going
to be enqueued into the virtqueue. The index is necessary
to prevent the receive VQ and the netmap rx ring from going
out of sync, considering that we never enqueue N slots, but
at most N-1. This change fixes a bug that causes the VQ
and the netmap ring to go out of sync after N-1 packets
have been received.
MFC after: 1 week
The netmap_rx_irq() function normally wakes up user-space threads
waiting for more packets. In this case, it is not necessary to
call it under the driver queue lock. However, if the interface is
attached to a VALE switch, netmap_rx_irq() ends up calling rxsync
on the interface (see netmap_bwrap_intr_notify()). Although
concurrent rxsyncs are serialized through the kring lock
(see nm_kr_tryget()), the lock acquire operation is not blocking.
As a result, it may happen that netmap_rx_irq() is called on
an RX ring while another instance is running, causing the
second call to fail, and received packets stall in the receive VQ.
We fix this issue by calling netmap_irx_irq() under the VQ lock.
MFC after: 1 week
The netmap_rx_irq() function may return NM_IRQ_RESCHED to inform the
driver that more work is pending, and that netmap expects netmap_rx_irq()
to be called again as soon as possible.
This change implements this behaviour in the vtnet driver.
MFC after: 1 week
* Set the tx/rx chains based on the existing MIMO eeprom reads
* Add 3-chain rates
Tested:
* MAC/BBP RT5390 (rev 0x0502), RF RT5370 (MIMO 1T1R), 2g/5g STA
* MAC/BBP RT3593 (rev 0x0402), RF RT3053 (MIMO 3T3R), 2g/5g STA
Now that I'm a proud owner of an ASUS USB-N66, I can test 2G/5G and
3-stream configurations.
For now, just flip on 5G HT rates. I've tested this in both
5G HT20 and 5G 11a modes. It's still one stream for now until
we verify that the number of streams reported (ie the MIMO below)
is actually the number of 11n streams, NOT the number of antennas.
(They don't have to match! You can have more antennas than MIMO
streams!)
Tested:
* run0: MAC/BBP RT3593 (rev 0x0402), RF RT3053 (MIMO 3T3R)
r361601 implemented basic support for cleaing the console history buffer.
But after clearing the history buffer, it's not especially useful to be
able to scroll back through that buffer, or for the cursor position to
remain at (very likely) the bottom of the screen.
PR: 224436
Reviewed by: emaste
Differential Revision: https://reviews.freebsd.org/D25079
which happens on some laptops after returning to legacy multiplexing mode
at initialization stage.
PR: 242542
Reported by: Felix Palmen <felix@palmen-it.de>
MFC after: 1 week
netmap assumes the one "slot" is left unused to distinguish
the empty ring and full ring conditions. This assumption was
violated by vtnet_netmap_rxq_populate().
MFC after: 1 week
The functionality contained in this function is duplicated,
as it is already available in vtnet_txq_free_mbufs()
and vtnet_rxq_free_mbufs().
MFC after: 1 week
The vtnet_netmap_rxq_populate() function erroneously assumed
that kring->nr_hwcur = 0, i.e. the kring was in the initial
state. However, this is not always the case: for example,
when a vtnet reinit is triggered by some changes in the
interface flags or capenable.
This patch changes the behaviour of vtnet_netmap_kring_refill()
so that it always starts publishing the netmap buffers starting
from the current value of kring->nr_hwcur.
MFC after: 1 week
This is something I added a few years ago to handle resyncing the beacon if
we miss a beacon or need to sync after association/reassociation/powersave.
However, if we're doing STA+AP mode (eg DWDS) then we don't want
to reprogram the beacons here; this may upset normal AP operation.
I missed checking for the sc->sc_swbmiss flag so I was reinitialising
the beacon timers after every beacon miss / TSFOOR option, and
that isn't likely good.
This plus ensuring that STA's are created with "-beacon" to disable
BMISS/TSFOOR processing will hopefully quieten some of the issues
I've seen with missed beacons / TSFOOR (out of range) interrupts
coming in when operating in STA mode.
Tested:
* AR9380/AR9580, STA+AP modes
* Enable self-generated 11n frames
* add MCS rates for 1-stream and 2-stream rates; will do 3-stream
once the rest of this tests out OK with other people.
* Hard-code 1 stream for now
* Add A-MPDU RX mbuf tagging
* RTS/CTS if doing RTSCTS in HT protmode as well as legacy; they're
separate configuration flags
* Update the amrr rate index stuff - walk the rates array like others
to find the right one - this now works for MCS and CCK/OFDM rates
* Add support for atheros fast frames/AMSDU support as we can generate
those in net80211.
TODO:
* HT40 isn't enabled yet
* No A-MPDU support just yet; that requires some more firmware research
and maybe porting some ath(4) A-MPDU support/tracking into net80211
* Short preamble flags aren't set yet for MCS; need to check the linux
driver and see what's going on there
* Add 3x3 rates and set tx/rx stream configuration appropriately
* More 5GHz testing; I have a 3x3 dual band USB NIC coming soon that'll
let me test this.
* Figure out why the RX path isn't performing as fast as it could -
there's only a single buffer loaded at a time for the receive path
in the USB bulk handler and this may not be super useful.
Tested:
* RT5390 usb, 1x1, RF5370 (2GHz radio), STA mode - A-MSDU TX, A-MPDU RX
Submitted by: Ashish Gupta <ashishgu@andrew.cmu.edu>
Differential Revision: https://reviews.freebsd.org/D22840
PCI bus driver restores most but not all of a child PCI-PCI bridge
configuration. The bridge's I/O windows are restored by pcib driver and
that happens later in time. This can be problematic because the Command
register is restored before the windows are restored. If the firmware
programs the windows incorrectly or even does not program them at all,
then the bridge can start claiming I/O cycles that are not intended for
it. This will continue until the correct windows are restored.
I have observed this problem with a buggy BIOS where after resuming from
S3 an I/O port window of a PCI-PCI bridge was configured with zero base
and limit causing the bridge to claim 0x0 - 0xFFF port range. That
interfered with ACPI port access including ACPI PM Timer at port 0x808,
thus wreaking havoc in the time keeping.
The solution is to restore the Command register of PCI-PCI bridges after
the windows are restored in pcib driver. While here, I decided that for
other PCI device types (normal and cardbus) it's better to restore the
Command register after their BARs are restored.
To do: per jhb's suggestion, move the window handling to pci driver.
Reviewed by: imp, jhb, kib
MFC after: 2 weeks
Differential Revision: https://reviews.freebsd.org/D25028
Extract scrollback buffer initialization into a common routine, used both
during vt(4) init and in handling the CONS_CLRHIST ioctl.
PR: 224436
Reviewed by: emaste
Differential Revision: https://reviews.freebsd.org/D24815
If there's no data to read from xenstore short-circuit
xctrl_on_watch_event to return early, there's no reason to continue
since the lack of data would prevent matching against any known event
type.
Sponsored by: Citrix Systems R&D
MFC with: r352925
MFC after: 1 week
The correct type to use to represent disk sectors is blkif_sector_t
(which is an uint64_t underneath). This avoid truncation of the disk
size calculation when resizing on i386, as otherwise the calculation
of d_mediasize in xbd_connect is truncated to the size of unsigned
long, which is 32bits on i386.
Note this issue didn't affect amd64, because the size of unsigned long
is 64bits there.
Sponsored by: Citrix Systems R&D
MFC after: 1 week
Until net80211 grows a specific ticks type that matches the system,
manually use the same type as the kernel/net80211 'ticks' type
(signed int.)
Tested:
* AR9380, STA mode
The ice(4) driver is the driver for the Intel E8xx series Ethernet
controllers; currently with codenames Columbiaville and
Columbia Park.
These new controllers support 100G speeds, as well as introducing
more queues, better virtualization support, and more offload
capabilities. Future work will enable virtual functions (like
in ixl(4)) and the other functionality outlined above.
For full functionality, the kernel should be compiled with
"device ice_ddp" like in the amd64 NOTES file, and/or
ice_ddp_load="YES" should be added to /boot/loader.conf so that
the DDP package file included in this commit can be downloaded
to the adapter. Otherwise, the adapter will fall back to a single
queue mode with limited functionality.
A man page for this driver will be forthcoming.
MFC after: 1 month
Relnotes: yes
Sponsored by: Intel Corporation
Differential Revision: https://reviews.freebsd.org/D21959
Driver version upgrade is connected with support for the new device
fetures, like Tx drops reporting or disabling meta caching.
Moreover, the driver configuration from the sysctl was reworked to
provide safer and better flow for configuring:
* number of IO queues (new feature),
* drbr size on Tx,
* Rx queue size.
Moreover, a lot of minor bug fixes and improvements were added.
Copyright date in the license of the modified files in this release was
updated to 2020.
Submitted by: Michal Krawczyk <mk@semihalf.com>
Obtained from: Semihalf
Sponsored by: Amazon, Inc.
There is no guarantee from bus_dmamap_load_mbuf_sg() for matching
mbuf chain segments to dma physical segments.
This patch ensure correctly mapping to LLQ header and DMA segments.
Submitted by: Ido Segev <idose@amazon.com>
Obtained from: Amazon, Inc.
There is ena_free_all_io_rings_resources() called twice on device
detach:
ena_detach():
ena_destroy_device():
/* First call */
ena_free_all_io_rings_resources()
/* Second call */
ena_free_all_io_rings_resources()
The double-free causes panic() on kldunload, for example.
As the ena_destroy_device() is also called by ena_reset_task() it is
better to stay unchanged. Thus, remove the "Second call" of the function.
Submitted by: Maciej Bielski <mba@semihalf.com>
Obtained from: Semihalf
Sponsored by: Amazon, Inc.
Determined by a flag passed from the device. No metadata is set within
ena_tx_csum when caching is disabled.
Submitted by: Maciej Bielski <mba@semihalf.com>
Obtained from: Semihalf
Sponsored by: Amazon, Inc.
If requested size of IO queues is not supported try to decrease it until
finding the highest value that can be satisfied.
Submitted by: Maciej Bielski <mba@semihalf.com>
Obtained from: Semihalf
Sponsored by: Amazon, Inc.
By default, in ena_attach() the driver attempts to acquire
ena_adapter::max_num_io_queues MSI-X vectors for the purpose of IO
queues, however this is not guaranteed. The number of vectors acquired
depends also on system resources availability.
Regardless of that, enable the number of effectively used IO queues to
be further limited through the sysctl node.
Example: Assumming that there are 8 IO queues configured by default, the
command
$ sysctl dev.ena.0.io_queues_nb=4
will reduce the number of available IO queues to 4. Similarly, the value
can be also increased up to maximum supported value. A value higher than
maximum supported number of IO queues is ignored. Zero is ignored too.
Submitted by: Maciej Bielski <mba@semihalf.com>
Obtained from: Semihalf
Sponsored by: Amazon, Inc.
Make the ena_adapter::num_io_queues a number of effectively used IO
queues. While the ena_adapter::max_num_io_queues is an upper-bound
specified by the HW, the ena_adapter::num_io_queues may be lower than
that, depending on runtime system resources availability.
On reset, there are called ena_destroy_device() and then
ena_restore_device(). The latter calls, in turn, ena_enable_msix(),
which will attempt to re-acquire ena_adapter::max_num_io_queues of
MSIX vectors again.
Thus, the value of ena_adapter::num_io_queues may be different before
and after reset. For this reason, free the IO rings structures (drbr,
counters) in ena_destroy_device() and allocate again in
ena_restore_device().
Submitted by: Maciej Bielski <mba@semihalf.com>
Obtained from: Semihalf
Sponsored by: Amazon, Inc.
This method has been aligned with the way how the Rx queue size is being
updated - so it's now done synchronously instead of resetting the
device.
Moreover, the input parameter is now being validated if it's a power of
2. Without this, it can cause kernel panic.
Submitted by: Michal Krawczyk <mk@semihalf.com>
Obtained from: Semihalf
Sponsored by: Amazon, Inc.
This patch reworks how the Rx queue size is being reconfigured and how
the information from the device is being processed.
Reconfiguration of the queues and reset of the device in order to make
the changes alive isn't the best approach. It can be done synchronously
and it will let to pass information if the reconfiguration was
successful to the user. It now is done in the ena_update_queue_size()
function.
To avoid reallocation of the ring buffer, statistic counters and the
reinitialization of the mutexes when only new size has to be assigned,
the io queues initialization function has been split into 2 stages:
basic, which is just copying appropriate fields and the advanced, which
allocates and inits more advanced structures for the IO rings.
Moreover, now the max allowed Rx and Tx ring size is being kept
statically in the adapter and the size of the variables holding those
values has been changed to uint32_t everywhere.
Information about IO queues size is now being logged in the up routine
instead of the attach.
Submitted by: Michal Krawczyk <mk@semihalf.com>
Obtained from: Semihalf
Sponsored by: Amazon, Inc.
Recent changes to the epoch requires driver to notify that they knows
epoch in order to prevent input packet function to enter epoch each
time the packet is received.
ENA is using NET_TASK for handling Rx, so it's entering epoch
automatically whenever this task is being executed.
Submitted by: Michal Krawczyk <mk@semihalf.com>
Obtained from: Semihalf
Sponsored by: Amazon, Inc.
If the conditional check for ENA_FLAG_DEV_UP is negated, the body of the
function can have smaller indentation and it makes the code cleaner.
Submitted by: Michal Krawczyk <mk@semihalf.com>
Obtained from: Semihalf
Sponsored by: Amazon, Inc.
As functions which are declared in the header files are intended to be
the interface and are going to be used by other files, it's better to
include argument names in the definition, so the caller won't have to
check the .c file in order to check their meaning and order.
Submitted by: Michal Krawczyk <mk@semihalf.com>
Obtained from: Semihalf
Sponsored by: Amazon, Inc.
Currently, the driver had 2 global locks - one was sx lock used for
up/down synchronization and the second one was mutex, which was used
for link configuration and timer service callout.
It is better to have single lock for that. We cannot use mutex, as it
can sleep and cause witness errors in up/down configuration, so sx lock
seems to be the only choice.
Callout cannot use sx lock, but the timer service is MP safe, so we just
need to avoid race between ena_down() and ena_detach(). It can be
avoided by acquiring sx lock.
Simple macros were added that are encapsulating implementation of the
lock and makes the code cleaner.
Submitted by: Michal Krawczyk <mk@semihalf.com>
Obtained from: Semihalf
Sponsored by: Amazon, Inc.
As the reset triggering is no longer a simple macro that was just
setting appropriate flag, the new function for triggering reset was
added. It improves code readability a lot, as we are avoiding additional
indentation.
Submitted by: Michal Krawczyk <mk@semihalf.com>
Obtained from: Semihalf
Sponsored by: Amazon, Inc.
The function ena_enable_msix_and_set_admin_interrupts takes two
arguments while the second is not used and so can be spared. This is a
static function, only ena.c is affected.
Submitted by: Maciej Bielski <mba@semihalf.com>
Obtained from: Semihalf
Sponsored by: Amazon, Inc.
Tx drops statistics are fetched from HW every ena_keepalive_wd() call
and are observable using one of the commands:
* sysctl dev.ena.0.hw_stats.tx_drops
* netstat -I ena0 -d
Submitted by: Maciej Bielski <mba@semihalf.com>
Obtained from: Semihalf
Sponsored by: Amazon, Inc.
