Fixes gcc '-Wunused-but-set-variable' warning:

drivers/net/wireless/mediatek/mt76/dma.c: In function mt76_dma_rx_fill:
drivers/net/wireless/mediatek/mt76/dma.c:377:6: warning: variable idx set but not used [-Wunused-but-set-variable]

It is not used since commit 17f1de56 ("mt76:
add common code shared between multiple chipsets")
Reported-by: NHulk Robot <hulkci@huawei.com>
Signed-off-by: Nzhengbin <zhengbin13@huawei.com>
Signed-off-by: NFelix Fietkau <nbd@nbd.name>

rate controller and throughput are very sensitive to tx status timing.
In order to improve performances when the system is heavily loaded,
substitute stat_work delayed_work with a regular work_struct and create
a mt76u dedicated workqueue for tx status reporting
Signed-off-by: NLorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: NFelix Fietkau <nbd@nbd.name>

usb drivers are supposed to communicate using usb_interface instead
mt76x{0,2}u is now registering through usb_device. Fix it by passing
usb_intf device to mt76_alloc_device routine.

Fixes: 112f980a ("mt76usb: use usb_dev private data")
Signed-off-by: NLorenzo Bianconi <lorenzo@kernel.org>
Tested-By: NZero_Chaos <sidhayn@gmail.com>
Signed-off-by: NFelix Fietkau <nbd@nbd.name>

remove unneeded semicolon.
This is detected by coccinelle.
Signed-off-by: NYueHaibing <yuehaibing@huawei.com>
Signed-off-by: NFelix Fietkau <nbd@nbd.name>

Since mt76x0 does not save the phy calibration data it is not necessary
to wait 350ms in mt76x0_phy_calibrate
Tested-by: NSid Hayn <sidhayn@gmail.com>
Signed-off-by: NLorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: NFelix Fietkau <nbd@nbd.name>

Update ewma packet length in mt76x02u_tx_prepare_skb as it is
done for pci counterpart in order to properly estimate tx time on
current channel
Signed-off-by: NLorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: NFelix Fietkau <nbd@nbd.name>

It hasn't been used in a while
Signed-off-by: NFelix Fietkau <nbd@nbd.name>

Avoid dereferencing invalid ids
Signed-off-by: NFelix Fietkau <nbd@nbd.name>

Read busy counters not holding cc_lock spinlock since usb read can't be
performed in interrupt context. Move cc_active and cc_rx counters out of
cc_lock since they are not modified in interrupt context.
Grab cc_lock updating cur_cc_bss_rx in mt76_airtime_report and do not
hold rx_lock in mt76_update_survey.
Moreover grab mt76 mutex in mt76_get_survey before running
mt76_update_survey. This patch fixes the following 'schedule while
atomic'

[  291.790866] BUG: scheduling while atomic: iw/2161/0x00000202
[  291.791002] Preemption disabled at:
[  291.791007] [<0000000000000000>] 0x0
[  291.791015] CPU: 0 PID: 2161 Comm: iw Tainted: G W 5.4.= 0-rc2-3-ARCH-00104-g9e208aa0 #1
[  291.791017] Hardware name: LENOVO 2349QM6/2349QM6, BIOS G1ETC2WW (2.82=) 08/07/2019
[  291.791019] Call Trace:
[  291.791042]  dump_stack+0x5c/0x80
[  291.791049]  __schedule_bug.cold+0x8e/0x9b
[  291.791055]  __schedule+0x5f8/0x770
[  291.791062]  schedule+0x43/0xd0
[  291.791068]  schedule_preempt_disabled+0x14/0x20
[  291.791074]  __mutex_lock.isra.0+0x18a/0x530
[  291.791099]  mt76u_rr+0x1f/0x40 [mt76_usb]
[  291.791113]  mt76x02_update_channel+0x22/0x40 [mt76x02_lib]
[  291.791122]  mt76_update_survey+0x42/0xe0 [mt76]
[  291.791129]  mt76_get_survey+0x2f/0x1b0 [mt76]
[  291.791170]  ieee80211_dump_survey+0x5e/0x140 [mac80211]
[  291.791217]  nl80211_dump_survey+0x13c/0x2f0 [cfg80211]
[  291.791222]  ? __kmalloc_reserve.isra.0+0x2d/0x70
[  291.791225]  ? __alloc_skb+0x96/0x1d0
[  291.791229]  netlink_dump+0x17b/0x370
[  291.791247]  __netlink_dump_start+0x16f/0x1e0
[  291.791253]  genl_family_rcv_msg+0x396/0x410
[  291.791290]  ? nl80211_prepare_wdev_dump+0x1b0/0x1b0 [cfg80211]
[  291.791297]  ? _raw_spin_unlock_irqrestore+0x20/0x40
[  291.791312]  ? __wake_up_common_lock+0x8a/0xc0
[  291.791316]  genl_rcv_msg+0x47/0x90
[  291.791320]  ? genl_family_rcv_msg+0x410/0x410
[  291.791323]  netlink_rcv_skb+0x49/0x110
[  291.791329]  genl_rcv+0x24/0x40
[  291.791333]  netlink_unicast+0x171/0x200
[  291.791340]  netlink_sendmsg+0x208/0x3d0
[  291.791358]  sock_sendmsg+0x5e/0x60
[  291.791361]  ___sys_sendmsg+0x2ae/0x330
[  291.791368]  ? filemap_map_pages+0x272/0x390
[  291.791374]  ? _raw_spin_unlock+0x16/0x30
[  291.791379]  ? __handle_mm_fault+0x112f/0x1390
[  291.791388]  __sys_sendmsg+0x59/0xa0
[  291.791396]  do_syscall_64+0x5b/0x1a0
[  291.791400]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[  291.791404] RIP: 0033:0x7f5d0c7f37b7
[  291.791418] Code: 64 89 02 48 c7 c0 ff ff ff ff eb bb 0f 1f 80 00 00 0=
0 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2e 00 00 00 0f 05=
 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10
[  291.791421] RSP: 002b:00007ffe8b5d0538 EFLAGS: 00000246 ORIG_RAX: 0000= 00000000002e
[  291.791426] RAX: ffffffffffffffda RBX: 000055a038e6c390 RCX: 00007f5d0= c7f37b7
[  291.791430] RDX: 0000000000000000 RSI: 00007ffe8b5d0570 RDI: 000000000= 0000003
[  291.791434] RBP: 000055a038e718c0 R08: 000055a038e6c02a R09: 000000000= 0000002
[  291.791438] R10: 000055a03808cb00 R11: 0000000000000246 R12: 000055a03= 8e71780
[  291.791440] R13: 00007ffe8b5d0570 R14: 000055a038e717d0 R15: 000055a03= 8e718c0
[  291.791480] NOHZ: local_softirq_pending 202

Fixes: 168aea24 ("mt76: mt76x02u: enable survey support")
Tested-by: NMarkus Theil <markus.theil@tu-ilmenau.de>
Signed-off-by: NLorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: NFelix Fietkau <nbd@nbd.name>

mt76x0e driver only supports MAC addresses from
calibration data eeprom. Many routers however do not
have a valid stock address set in this field.

This patch makes it possible to take a MAC address
from OF (e.g. from mtd).
Signed-off-by: NPawel Dembicki <paweldembicki@gmail.com>
[adjusted for kernel submission]
Signed-off-by: NAdrian Schmutzler <freifunk@adrianschmutzler.de>
Signed-off-by: NFelix Fietkau <nbd@nbd.name>

if napi_complete() returns false, it means that polling is still pending.
Interrupts should not fire until the polling is no longer scheduled
Signed-off-by: NFelix Fietkau <nbd@nbd.name>

Cancel the workqueue after the tid has been cleaned up, in order to
avoid a possible rescheduling from within the work function.
Signed-off-by: NFelix Fietkau <nbd@nbd.name>

A rcu read locked section is not allowed to sleep, and the rcu lock here
isn't actually necessary, because we're holding dev->mutex.
Fixes an issue when the tid work item is still running while freeing
a station or stopping the aggregation session
Signed-off-by: NFelix Fietkau <nbd@nbd.name>

This is needed primarily to avoid races in dealing with rx aggregation
related data structures
Signed-off-by: NFelix Fietkau <nbd@nbd.name>

With the devm API, the unregister happens after the device cleanup is done,
after which the struct mt76_dev which contains the led_cdev has already been
freed. This leads to a use-after-free bug that can crash the system.
Signed-off-by: NFelix Fietkau <nbd@nbd.name>

It is supported by all hardware drivers now
Signed-off-by: NFelix Fietkau <nbd@nbd.name>
Acked-by: NToke Høiland-Jørgensen <toke@redhat.com>

Poll per-station hardware counters available in WTBL after tx/rx
status events in order to report tx/rx airtime to mac80211 layer
Co-developed-by: NFelix Fietkau <nbd@nbd.name>
Signed-off-by: NLorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: NFelix Fietkau <nbd@nbd.name>

Introduce mt7615_mac_wtbl_update utility routine in order to update
WTBL update register
Signed-off-by: NLorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: NFelix Fietkau <nbd@nbd.name>

Like on mt7603, MIB status register 16 tracks CCA time, but does not
include tx time. Switch to status register 9 to includ NAV and tx
time as well.
Signed-off-by: NFelix Fietkau <nbd@nbd.name>

Report tx time/rx time and obss time from hw mib counters to fill survey
info requested by mac80211
Co-developed-by: NFelix Fietkau <nbd@nbd.name>
Signed-off-by: NLorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: NFelix Fietkau <nbd@nbd.name>

Estimate by calculating duration for EWMA packet size + estimated A-MPDU
length on tx status events
Signed-off-by: NFelix Fietkau <nbd@nbd.name>

Reduces code duplication and adds missing bits for USB variants
Signed-off-by: NFelix Fietkau <nbd@nbd.name>

Host time is used to calculate the channel active time on mt7603 and mt7615.
Use the same on mt76x02 and move the lock to core code to get rid of some
duplicated code.
Signed-off-by: NFelix Fietkau <nbd@nbd.name>

MT_MIB_STAT_PSCCA only counts rx CCA busy time, which does not include
tx time. MT_MIB_STAT_CCA counts full busy time, including Rx, Tx and NAV
Signed-off-by: NFelix Fietkau <nbd@nbd.name>

Poll per-station hardware counters after tx status events
Signed-off-by: NFelix Fietkau <nbd@nbd.name>

Report total rx airtime for valid stations as BSS rx time in survey

mt7615 is left out for now, it will be supported later by reading
hardware counters instead of calculating airtime in software
Signed-off-by: NFelix Fietkau <nbd@nbd.name>

Move mt76_channel_state() from mt76.h to mac80211.c
Preparation for updating channel state from more places in the drivers/core
Signed-off-by: NFelix Fietkau <nbd@nbd.name>

This reduces the struct size and is useful for adding more flags later
Signed-off-by: NFelix Fietkau <nbd@nbd.name>

This can be used in monitor mode to figure out which subframes were sent as
part of which A-MPDU
Signed-off-by: NFelix Fietkau <nbd@nbd.name>

It is no longer used
Signed-off-by: NFelix Fietkau <nbd@nbd.name>

Introduce ampdu_stat entry in mt7603 debugfs in order to dump 802.11
aggr cumulative statistics
Signed-off-by: NLorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: NFelix Fietkau <nbd@nbd.name>

Introduce ampdu_stat entry in mt7615 debugfs in order to dump 802.11
aggr cumulative statistics
Signed-off-by: NLorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: NFelix Fietkau <nbd@nbd.name>

Move aggr_stats array from mt76x02_dev to mt76_dev in order to be reused
adding aggregation stats for mt7603/mt7615 drivers
Signed-off-by: NLorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: NFelix Fietkau <nbd@nbd.name>

Introduce mt7615_queues_read routine to dump hw queue related info.
Add hw ac queues statistics in mt7615 debugfs
Signed-off-by: NLorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: NFelix Fietkau <nbd@nbd.name>

Move queue debugfs entry to driver specific code since mt7615 devices
rely on a different queue layout
Signed-off-by: NLorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: NFelix Fietkau <nbd@nbd.name>

Unify mt76x02u_mac_start between mt76x2u and mt76x0u since the
code is shared between both drivers
Signed-off-by: NLorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: NFelix Fietkau <nbd@nbd.name>

Remove mt76x02_mac_reset_counters from mt76x0_init_hardware since
it will be run starting the device
Signed-off-by: NLorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: NFelix Fietkau <nbd@nbd.name>

Move mt76x02_mac_reset_counters in mt76x02_mac_start and get rid of
mt76x2_mac_start since it is just a wrapper for mt76x02_mac_start
Signed-off-by: NLorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: NFelix Fietkau <nbd@nbd.name>

Unify mac_reset_counter routine and move it in mt76x02_lib module
since it is shared by all mt76x02 drivers (pci/usb)
Signed-off-by: NLorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: NFelix Fietkau <nbd@nbd.name>

Enable Smart Carrier Sense algorithm by default in order to improve
performances in a noisy environment
Signed-off-by: NLorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: NFelix Fietkau <nbd@nbd.name>