wifi: ath10k: Update Qualcomm Innovation Center, Inc. copyrights

Update the copyright for all ath10k files modified on behalf of
Qualcomm Innovation Center, Inc. in 2021 through 2023.

Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20231128-ath12kcopyrights-v1-3-be0b7408cbac@quicinc.com

wifi: ath10k: simplify __ath10k_htt_tx_txq_recalc()

Since 'ieee80211_txq_get_depth()' allows NULL for 2nd and
3rd arguments, simplify '__ath10k_htt_tx_txq_recalc()' by
dropping unused 'frame_cnt'. Compile tested only.

Signed-off-by: Dmitry Antipov <dmantipov@yandex.ru>
Acked-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20231102115459.69791-1-dmantipov@yandex.ru

wifi: ath10k: Remove unnecessary (void*) conversions

No need cast (void*) to (struct htt_rx_ring_setup_ring32 *),
(struct htt_rx_ring_setup_ring64 *). Change the prototype to
remove the local variable.

Signed-off-by: Wu Yunchuan <yunchuan@nfschina.com>
Suggested-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20230919045056.523958-1-yunchuan@nfschina.com

wifi: ath10k: Fix miscellaneous spelling errors

Fix misspellings flagged by 'codespell'.

Signed-off-by: Jeff Johnson <quic_jjohnson@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20220909145300.19223-1-quic_jjohnson@quicinc.com

ath10k: htt_tx: do not interpret Eth frames as WiFi

The xmit path for the Ethernet encapsulated frames become more or less
usable since d740d8fd2439 ("ath10k: unify tx mode and dispatch"). This
change reorganize the xmit path in a manageable way to properly support
various tx modes, but misses that the Ethernet encapsulated frame is a
special case. We do not have an IEEE 802.11 header at the begining of
them. But the HTT Tx handler still interprets first bytes of each frame
as an IEEE 802.11 Frame Control field.

Than this code was copied by e62ee5c381c5 ("ath10k: Add support for
htt_data_tx_desc_64 descriptor") and a2097d6444c3 ("ath10k: htt: High
latency TX support") to another handlers. In fact the issue in the high
latency (HL) handler was introduced by 83ac260151e7 ("ath10k: add mic
bytes for pmf management packet").

Ethernet encapsulated frame tx mode stay unused until 75d85fd9993c
("ath10k: introduce basic tdls functionality") started using it for TDLS
frames to avoid key selection issue in some firmwares.

Trying to interpret the begining of an Ethernet encapsulated frame as an
IEEE 802.11 header was not hurt us noticeably since we need to meet two
conditions: (1) xmit should be performed towards a TDLS peer, and (2)
the TDLS peer should have a specific OUI part of its MAC address. Looks
like that the rareness in TDLS communications of OUIs that can be
interpreted as an 802.11 management frame saves users from facing this
issue earlier.

Improve Ethernet tx mode support in the HTT Tx handler by avoiding
interpreting its first bytes as an IEEE 802.11 header. While at it, make
the ieee80211_hdr variable local to the code block that is guarded by
!is_eth check. In this way, we clarify in which cases a frame can be
interpreted as IEEE 802.11, and saves us from similar issues in the
future.

Credits: this change as part of xmit encapsulation offloading support
was originally made by QCA and then submitted for inclusion by John
Crispin [1]. But the whole work was not accepted due to the lack of a
part for 64-bits descriptors [2]. Zhijun You then pointed this out to me
in a reply to my initial RFC patch series. And I made this slightly
reworked version that covered all the HTT Tx handler variants.

1. https://lore.kernel.org/all/20191216092207.31032-1-john@phrozen.org/
2. https://patchwork.kernel.org/project/linux-wireless/patch/20191216092207.31032-1-john@phrozen.org/

Reported-by: Zhijun You <hujy652@gmail.com>
Signed-off-by: Vasanthakumar Thiagarajan <vthiagar@qti.qualcomm.com>
Signed-off-by: John Crispin <john@phrozen.org>
Signed-off-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20220516032519.29831-3-ryazanov.s.a@gmail.com

ath10k: abstract htt_rx_desc structure

QCA6174 card often hangs with the current htt_rx_desc
memory layout in some circumstances, because its firmware
fails to handle length differences.
Therefore we must abstract the htt_rx_desc structure
and operations on it, to allow different wireless cards
to use different, unrelated rx descriptor structures.

Define a base htt_rx_desc structure and htt_rx_desc_v1
for use with the QCA family of ath10k supported cards
and htt_rx_desc_v2 for use with the WCN3990 card.

Define htt_rx_desc_ops which contains the abstract operations
to access the generic htt_rx_desc, give implementations
for each card and update htt_rx.c to use the defined
abstract interface to rx descriptors.

Fixes: e3def6f7ddf8 ("ath10k: Update rx descriptor for WCN3990 target")

Tested-on: QCA6174 hw3.2 PCI WLAN.RM.4.4.1-00157-QCARMSWPZ-1

Co-developed-by: Enrico Lumetti <enrico@fracta.dev>
Signed-off-by: Enrico Lumetti <enrico@fracta.dev>
Signed-off-by: Francesco Magliocca <franciman12@gmail.com>
Link: https://lore.kernel.org/ath10k/CAH4F6usFu8-A6k5Z7rU9__iENcSC6Zr-NtRhh_aypR74UvN1uQ@mail.gmail.com/
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20211216151823.68878-1-franciman12@gmail.com

ath10k: Fix tx hanging

While running stress tests in roaming scenarios (switching ap's every 5
seconds, we discovered a issue which leads to tx hangings of exactly 5
seconds while or after scanning for new accesspoints. We found out that
this hanging is triggered by ath10k_mac_wait_tx_complete since the
empty_tx_wq was not wake when the num_tx_pending counter reaches zero.
To fix this, we simply move the wake_up call to htt_tx_dec_pending,
since this call was missed on several locations within the ath10k code.

Signed-off-by: Sebastian Gottschall <s.gottschall@dd-wrt.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://lore.kernel.org/r/20210505085806.11474-1-s.gottschall@dd-wrt.com

ath10k: restore tx sk_buff of htt header for SDIO

ieee80211_report_used_skb of mac80211 use the frame_control of
ieee80211_hdr in sk_buff and indicate it to another function
ieee80211_mgd_conn_tx_status, then it queue work ieee80211_sta_work,
but ieee80211_is_auth(fc) in ieee80211_sta_work check fail when the
authentication has transmitted by ath10k.

When the ath10k report it with HTT_TX_COMPL_STATE_DISCARD, it will be
set without flag IEEE80211_TX_STAT_ACK, then mac80211 should try the
next authentication immeditely, but in fact mac80211 wait 1 second for
it, the reason is ieee80211_is_auth(fc) in ieee80211_sta_work check
fail for the sk_buff which is not restored, the data of sk_buff is not
the begin of ieee80211_hdr, in fact it is the begin of htt_cmd_hdr.

dmesg without this patch, it wait 1 second for the next retry when
ath10k report without IEEE80211_TX_STAT_ACK for authentication:
[ 6973.883116] wlan0: send auth to 5e:6f:2b:0d:fb:d7 (try 1/3)
[ 6974.705471] wlan0: send auth to 5e:6f:2b:0d:fb:d7 (try 2/3)
[ 6975.712962] wlan0: send auth to 5e:6f:2b:0d:fb:d7 (try 3/3)

Restore the sk_buff make mac8011 retry the next authentication
immeditely which meet logic of mac80211.

dmesg with this patch, it retry the next immeditely when ath10k
report without IEEE80211_TX_STAT_ACK for authentication:
[ 216.734813] wlan0: send auth to 5e:6f:2b:0d:fb:d7 (try 1/3)
[ 216.739914] wlan0: send auth to 5e:6f:2b:0d:fb:d7 (try 2/3)
[ 216.745874] wlan0: send auth to 5e:6f:2b:0d:fb:d7 (try 3/3)

Tested-on: QCA6174 hw3.2 SDIO WLAN.RMH.4.4.1-00049

Signed-off-by: Wen Gong <wgong@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/1612839530-2263-1-git-send-email-wgong@codeaurora.org

ath10k: remove h from printk format specifier

This change fixes the checkpatch warning described in this commit
commit cbacb5ab0aa0 ("docs: printk-formats: Stop encouraging use of
unnecessary %h[xudi] and %hh[xudi]")

Standard integer promotion is already done and %hx and %hhx is useless
so do not encourage the use of %hh[xudi] or %h[xudi].

Signed-off-by: Tom Rix <trix@redhat.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20210127222344.2445641-1-trix@redhat.com

ath10k: Use fallthrough pseudo-keyword

Replace the existing /* fall through */ comments and its variants with
the new pseudo-keyword macro fallthrough[1]. Also, remove unnecessary
fall-through markings when it is the case.

[1] https://www.kernel.org/doc/html/v5.7/process/deprecated.html?highlight=fallthrough#implicit-switch-case-fall-through

Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200727193821.GA981@embeddedor

ath10k: Acquire tx_lock in tx error paths

ath10k_htt_tx_free_msdu_id() has a lockdep assertion that htt->tx_lock
is held. Acquire the lock in a couple of error paths when calling that
function to ensure this condition is met.

Fixes: 6421969f248fd ("ath10k: refactor tx pending management")
Fixes: e62ee5c381c59 ("ath10k: Add support for htt_data_tx_desc_64 descriptor")
Signed-off-by: Evan Green <evgreen@chromium.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200604105901.1.I5b8b0c7ee0d3e51a73248975a9da61401b8f3900@changeid

ath10k: add flush tx packets for SDIO chip

When station connected to AP, and run TX traffic such as TCP/UDP, and
system enter suspend state, then mac80211 call ath10k_flush with set
drop flag, recently it only send wmi peer flush to firmware and
firmware will flush all pending TX packets, for PCIe, firmware will
indicate the TX packets status to ath10k, and then ath10k indicate to
mac80211 TX complete with the status, then all the packets has been
flushed at this moment. For SDIO chip, it is different, its TX
complete indication is disabled by default, and it has a tx queue in
ath10k, and its tx credit control is enabled, total tx credit is 96,
when its credit is not sufficient, then the packets will buffered in
the tx queue of ath10k, max packets is TARGET_TLV_NUM_MSDU_DESC_HL
which is 1024, for SDIO, when mac80211 call ath10k_flush with set drop
flag, maybe it have pending packets in tx queue of ath10k, and if it
does not have sufficient tx credit, the packets will stay in queue
untill tx credit report from firmware, if it is a noisy environment,
tx speed is low and the tx credit report from firmware will delay more
time, then the num_pending_tx will remain > 0 untill all packets send
to firmware. After the 1st ath10k_flush, mac80211 will call the 2nd
ath10k_flush without set drop flag immediately, then it will call to
ath10k_mac_wait_tx_complete, and it wait untill num_pending_tx become
to 0, in noisy environment, it is esay to wait about near 5 seconds,
then it cause the suspend take long time.

1st and 2nd callstack of ath10k_flush
[ 303.740427] ath10k_sdio mmc1:0001:1: ath10k_flush drop:1, pending:0-0
[ 303.740495] ------------[ cut here ]------------
[ 303.740739] WARNING: CPU: 1 PID: 3921 at /mnt/host/source/src/third_party/kernel/v4.19/drivers/net/wireless/ath/ath10k/mac.c:7025 ath10k_flush+0x54/0x104 [ath10k_core]
[ 303.740757] Modules linked in: bridge stp llc ath10k_sdio ath10k_core rfcomm uinput cros_ec_rpmsg mtk_seninf mtk_cam_isp mtk_vcodec_enc mtk_fd mtk_vcodec_dec mtk_vcodec_common mtk_dip mtk_mdp3 videobuf2_dma_contig videobuf2_memops v4l2_mem2mem videobuf2_v4l2 videobuf2_common hid_google_hammer hci_uart btqca bluetooth dw9768 ov8856 ecdh_generic ov02a10 v4l2_fwnode mtk_scp mtk_rpmsg rpmsg_core mtk_scp_ipi ipt_MASQUERADE fuse iio_trig_sysfs cros_ec_sensors_ring cros_ec_sensors_sync cros_ec_light_prox cros_ec_sensors industrialio_triggered_buffer
[ 303.740914] kfifo_buf cros_ec_activity cros_ec_sensors_core lzo_rle lzo_compress ath mac80211 zram cfg80211 joydev [last unloaded: ath10k_core]
[ 303.741009] CPU: 1 PID: 3921 Comm: kworker/u16:10 Tainted: G W 4.19.95 #2
[ 303.741027] Hardware name: MediaTek krane sku176 board (DT)
[ 303.741061] Workqueue: events_unbound async_run_entry_fn
[ 303.741086] pstate: 60000005 (nZCv daif -PAN -UAO)
[ 303.741166] pc : ath10k_flush+0x54/0x104 [ath10k_core]
[ 303.741244] lr : ath10k_flush+0x54/0x104 [ath10k_core]
[ 303.741260] sp : ffffffdf080e77a0
[ 303.741276] x29: ffffffdf080e77a0 x28: ffffffdef3730040
[ 303.741300] x27: ffffff907c2240a0 x26: ffffffde6ff39afc
[ 303.741321] x25: ffffffdef3730040 x24: ffffff907bf61018
[ 303.741343] x23: ffffff907c2240a0 x22: ffffffde6ff39a50
[ 303.741364] x21: 0000000000000001 x20: ffffffde6ff39a50
[ 303.741385] x19: ffffffde6bac2420 x18: 0000000000017200
[ 303.741407] x17: ffffff907c24a000 x16: 0000000000000037
[ 303.741428] x15: ffffff907b49a568 x14: ffffff907cf332c1
[ 303.741476] x13: 00000000000922e4 x12: 0000000000000000
[ 303.741497] x11: 0000000000000001 x10: 0000000000000007
[ 303.741518] x9 : f2256b8c1de4bc00 x8 : f2256b8c1de4bc00
[ 303.741539] x7 : ffffff907ab5e764 x6 : 0000000000000000
[ 303.741560] x5 : 0000000000000080 x4 : 0000000000000001
[ 303.741582] x3 : ffffffdf080e74a8 x2 : ffffff907aa91244
[ 303.741603] x1 : ffffffdf080e74a8 x0 : 0000000000000024
[ 303.741624] Call trace:
[ 303.741701] ath10k_flush+0x54/0x104 [ath10k_core]
[ 303.741941] __ieee80211_flush_queues+0x1dc/0x358 [mac80211]
[ 303.742098] ieee80211_flush_queues+0x34/0x44 [mac80211]
[ 303.742253] ieee80211_set_disassoc+0xc0/0x5ec [mac80211]
[ 303.742399] ieee80211_mgd_deauth+0x720/0x7d4 [mac80211]
[ 303.742535] ieee80211_deauth+0x24/0x30 [mac80211]
[ 303.742720] cfg80211_mlme_deauth+0x250/0x3bc [cfg80211]
[ 303.742849] cfg80211_mlme_down+0x90/0xd0 [cfg80211]
[ 303.742971] cfg80211_disconnect+0x340/0x3a0 [cfg80211]
[ 303.743087] __cfg80211_leave+0xe4/0x17c [cfg80211]
[ 303.743203] cfg80211_leave+0x38/0x50 [cfg80211]
[ 303.743319] wiphy_suspend+0x84/0x5bc [cfg80211]
[ 303.743335] dpm_run_callback+0x170/0x304
[ 303.743346] __device_suspend+0x2dc/0x3e8
[ 303.743356] async_suspend+0x2c/0xb0
[ 303.743370] async_run_entry_fn+0x48/0xf8
[ 303.743383] process_one_work+0x304/0x604
[ 303.743394] worker_thread+0x248/0x3f4
[ 303.743403] kthread+0x120/0x130
[ 303.743416] ret_from_fork+0x10/0x18

[ 303.743812] ath10k_sdio mmc1:0001:1: ath10k_flush drop:0, pending:0-0
[ 303.743858] ------------[ cut here ]------------
[ 303.744057] WARNING: CPU: 1 PID: 3921 at /mnt/host/source/src/third_party/kernel/v4.19/drivers/net/wireless/ath/ath10k/mac.c:7025 ath10k_flush+0x54/0x104 [ath10k_core]
[ 303.744075] Modules linked in: bridge stp llc ath10k_sdio ath10k_core rfcomm uinput cros_ec_rpmsg mtk_seninf mtk_cam_isp mtk_vcodec_enc mtk_fd mtk_vcodec_dec mtk_vcodec_common mtk_dip mtk_mdp3 videobuf2_dma_contig videobuf2_memops v4l2_mem2mem videobuf2_v4l2 videobuf2_common hid_google_hammer hci_uart btqca bluetooth dw9768 ov8856 ecdh_generic ov02a10 v4l2_fwnode mtk_scp mtk_rpmsg rpmsg_core mtk_scp_ipi ipt_MASQUERADE fuse iio_trig_sysfs cros_ec_sensors_ring cros_ec_sensors_sync cros_ec_light_prox cros_ec_sensors industrialio_triggered_buffer kfifo_buf cros_ec_activity cros_ec_sensors_core lzo_rle lzo_compress ath mac80211 zram cfg80211 joydev [last unloaded: ath10k_core]
[ 303.744256] CPU: 1 PID: 3921 Comm: kworker/u16:10 Tainted: G W 4.19.95 #2
[ 303.744273] Hardware name: MediaTek krane sku176 board (DT)
[ 303.744301] Workqueue: events_unbound async_run_entry_fn
[ 303.744325] pstate: 60000005 (nZCv daif -PAN -UAO)
[ 303.744403] pc : ath10k_flush+0x54/0x104 [ath10k_core]
[ 303.744480] lr : ath10k_flush+0x54/0x104 [ath10k_core]
[ 303.744496] sp : ffffffdf080e77a0
[ 303.744512] x29: ffffffdf080e77a0 x28: ffffffdef3730040
[ 303.744534] x27: ffffff907c2240a0 x26: ffffffde6ff39afc
[ 303.744556] x25: ffffffdef3730040 x24: ffffff907bf61018
[ 303.744577] x23: ffffff907c2240a0 x22: ffffffde6ff39a50
[ 303.744598] x21: 0000000000000000 x20: ffffffde6ff39a50
[ 303.744620] x19: ffffffde6bac2420 x18: 000000000001831c
[ 303.744641] x17: ffffff907c24a000 x16: 0000000000000037
[ 303.744662] x15: ffffff907b49a568 x14: ffffff907cf332c1
[ 303.744683] x13: 00000000000922ea x12: 0000000000000000
[ 303.744704] x11: 0000000000000001 x10: 0000000000000007
[ 303.744747] x9 : f2256b8c1de4bc00 x8 : f2256b8c1de4bc00
[ 303.744768] x7 : ffffff907ab5e764 x6 : 0000000000000000
[ 303.744789] x5 : 0000000000000080 x4 : 0000000000000001
[ 303.744810] x3 : ffffffdf080e74a8 x2 : ffffff907aa91244
[ 303.744831] x1 : ffffffdf080e74a8 x0 : 0000000000000024
[ 303.744853] Call trace:
[ 303.744929] ath10k_flush+0x54/0x104 [ath10k_core]
[ 303.745098] __ieee80211_flush_queues+0x1dc/0x358 [mac80211]
[ 303.745277] ieee80211_flush_queues+0x34/0x44 [mac80211]
[ 303.745424] ieee80211_set_disassoc+0x108/0x5ec [mac80211]
[ 303.745569] ieee80211_mgd_deauth+0x720/0x7d4 [mac80211]
[ 303.745706] ieee80211_deauth+0x24/0x30 [mac80211]
[ 303.745853] cfg80211_mlme_deauth+0x250/0x3bc [cfg80211]
[ 303.745979] cfg80211_mlme_down+0x90/0xd0 [cfg80211]
[ 303.746103] cfg80211_disconnect+0x340/0x3a0 [cfg80211]
[ 303.746219] __cfg80211_leave+0xe4/0x17c [cfg80211]
[ 303.746335] cfg80211_leave+0x38/0x50 [cfg80211]
[ 303.746452] wiphy_suspend+0x84/0x5bc [cfg80211]
[ 303.746467] dpm_run_callback+0x170/0x304
[ 303.746477] __device_suspend+0x2dc/0x3e8
[ 303.746487] async_suspend+0x2c/0xb0
[ 303.746498] async_run_entry_fn+0x48/0xf8
[ 303.746510] process_one_work+0x304/0x604
[ 303.746521] worker_thread+0x248/0x3f4
[ 303.746530] kthread+0x120/0x130
[ 303.746542] ret_from_fork+0x10/0x18

one sample's debugging log: it wait 3190 ms(5000 - 1810).

1st ath10k_flush, it has 120 packets in tx queue of ath10k:
<...>-1513 [000] .... 25374.786005: ath10k_log_err: ath10k_sdio mmc1:0001:1 ath10k_flush drop:1, pending:120-0
<...>-1513 [000] ...1 25374.788375: ath10k_log_warn: ath10k_sdio mmc1:0001:1 ath10k_htt_tx_mgmt_inc_pending htt->num_pending_mgmt_tx:0
<...>-1500 [001] .... 25374.790143: ath10k_log_dbg: ath10k_sdio mmc1:0001:1 bundle tx work, eid:1, count:121

2st ath10k_flush, it has 121 packets in tx queue of ath10k:
<...>-1513 [000] .... 25374.790571: ath10k_log_err: ath10k_sdio mmc1:0001:1 ath10k_flush drop:0, pending:121-0
<...>-1513 [000] .... 25374.791990: ath10k_log_err: ath10k_sdio mmc1:0001:1 ath10k_mac_wait_tx_complete state:1 pending:121-0
<...>-1508 [001] .... 25374.792696: ath10k_log_dbg: ath10k_sdio mmc1:0001:1 credit update: delta:46
<...>-1508 [001] .... 25374.792700: ath10k_log_dbg: ath10k_sdio mmc1:0001:1 credit total:46
<...>-1508 [001] .... 25374.792729: ath10k_log_dbg: ath10k_sdio mmc1:0001:1 bundle tx work, eid:1, count:121
<...>-1508 [001] .... 25374.792937: ath10k_log_dbg: ath10k_sdio mmc1:0001:1 bundle tx status:0, eid:1, req count:88, count:32, len:49792
<...>-1508 [001] .... 25374.793031: ath10k_log_dbg: ath10k_sdio mmc1:0001:1 bundle tx status:0, eid:1, req count:75, count:14, len:21784
kworker/u16:0-25773 [003] .... 25374.793701: ath10k_log_dbg: ath10k_sdio mmc1:0001:1 bundle tx complete, eid:1, pending complete count:46
<...>-1881 [000] .... 25375.073178: ath10k_log_dbg: ath10k_sdio mmc1:0001:1 credit update: delta:24
<...>-1881 [000] .... 25375.073182: ath10k_log_dbg: ath10k_sdio mmc1:0001:1 credit total:24
<...>-1881 [000] .... 25375.073429: ath10k_log_dbg: ath10k_sdio mmc1:0001:1 bundle tx work, eid:1, count:75
<...>-1879 [001] .... 25375.074090: ath10k_log_dbg: ath10k_sdio mmc1:0001:1 bundle tx complete, eid:1, pending complete count:24
<...>-1881 [000] .... 25375.074123: ath10k_log_dbg: ath10k_sdio mmc1:0001:1 bundle tx status:0, eid:1, req count:51, count:24, len:37344
<...>-1879 [001] .... 25375.270126: ath10k_log_dbg: ath10k_sdio mmc1:0001:1 credit update: delta:26
<...>-1879 [001] .... 25375.270130: ath10k_log_dbg: ath10k_sdio mmc1:0001:1 credit total:26
<...>-1488 [000] .... 25375.270174: ath10k_log_dbg: ath10k_sdio mmc1:0001:1 bundle tx work, eid:1, count:51
<...>-1488 [000] .... 25375.270529: ath10k_log_dbg: ath10k_sdio mmc1:0001:1 bundle tx status:0, eid:1, req count:25, count:26, len:40456
<...>-1879 [001] .... 25375.270693: ath10k_log_dbg: ath10k_sdio mmc1:0001:1 bundle tx complete, eid:1, pending complete count:26
<...>-1488 [001] .... 25377.775885: ath10k_log_dbg: ath10k_sdio mmc1:0001:1 credit update: delta:12
<...>-1488 [001] .... 25377.775890: ath10k_log_dbg: ath10k_sdio mmc1:0001:1 credit total:12
<...>-1488 [001] .... 25377.775933: ath10k_log_dbg: ath10k_sdio mmc1:0001:1 bundle tx work, eid:1, count:25
<...>-1488 [001] .... 25377.776059: ath10k_log_dbg: ath10k_sdio mmc1:0001:1 bundle tx status:0, eid:1, req count:13, count:12, len:18672
<...>-1879 [001] .... 25377.776100: ath10k_log_dbg: ath10k_sdio mmc1:0001:1 bundle tx complete, eid:1, pending complete count:12
<...>-1488 [001] .... 25377.878079: ath10k_log_dbg: ath10k_sdio mmc1:0001:1 credit update: delta:15
<...>-1488 [001] .... 25377.878087: ath10k_log_dbg: ath10k_sdio mmc1:0001:1 credit total:15
<...>-1879 [000] .... 25377.878323: ath10k_log_dbg: ath10k_sdio mmc1:0001:1 bundle tx work, eid:1, count:13
<...>-1879 [000] .... 25377.878487: ath10k_log_dbg: ath10k_sdio mmc1:0001:1 bundle tx status:0, eid:1, req count:0, count:13, len:20228
<...>-1879 [000] .... 25377.878497: ath10k_log_dbg: ath10k_sdio mmc1:0001:1 bundle tx complete, eid:1, pending complete count:13
<...>-1488 [001] .... 25377.919927: ath10k_log_dbg: ath10k_sdio mmc1:0001:1 credit update: delta:11
<...>-1488 [001] .... 25377.919932: ath10k_log_dbg: ath10k_sdio mmc1:0001:1 credit total:13
<...>-1488 [001] .... 25377.919976: ath10k_log_dbg: ath10k_sdio mmc1:0001:1 bundle tx work, eid:1, count:0
<...>-1881 [000] .... 25377.982645: ath10k_log_warn: ath10k_sdio mmc1:0001:1 HTT_T2H_MSG_TYPE_MGMT_TX_COMPLETION status:0
<...>-1513 [001] .... 25377.982973: ath10k_log_err: ath10k_sdio mmc1:0001:1 ath10k_mac_wait_tx_complete time_left:1810, pending:0-0

Flush all pending TX packets for the 1st ath10k_flush reduced the wait
time of the 2nd ath10k_flush and then suspend take short time.

This Patch only effect SDIO chips.

Tested with QCA6174 SDIO with firmware WLAN.RMH.4.4.1-00042.

Signed-off-by: Wen Gong <wgong@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200415233730.10581-1-wgong@codeaurora.org

ath10k: add htt TX bundle for sdio

The transmission utilization ratio for sdio bus for small packet is
slow, because the space and time cost for sdio bus is same for large
length packet and small length packet. So the speed of data for large
length packet is higher than small length.

Test result of different length of data:

data packet(byte) cost time(us) calculated rate(Mbps)
256 28 73
512 33 124
1024 35 234
1792 45 318
14336 168 682
28672 333 688
57344 660 695

This patch change the TX packet from single packet to a large length
bundle packet, max size is 32, it results in significant performance
improvement on TX path.

Also there's a fourth thread "ath10k_tx_complete_wq" added to ath10k as it
improves TCP RX throughput (values in Mbps):

TCP-RX TCP-TX UDP-RX UDP-TX
use workqueue_tx_complete 423 357 448 412
change it to ar->workqueue 410 360 449 414
change it to ar->workqueue_aux 405 339 446 401

This patch only effect sdio chip, it will not effect PCI, SNOC etc.
It only enable bundle for sdio chip.

Tested with QCA6174 SDIO with firmware
WLAN.RMH.4.4.1-00017-QCARMSWP-1.

Signed-off-by: Wen Gong <wgong@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200410061400.14231-2-wgong@codeaurora.org

ath10k: disable TX complete indication of htt for sdio

For sdio chip, it is high latency bus, all the TX packet's content will
be tranferred from HOST memory to firmware memory via sdio bus, then it
need much more memory in firmware than low latency bus chip, for low
latency chip, such as PCI-E, it only need to transfer the TX descriptor
via PCI-E bus to firmware memory. For sdio chip, reduce the complexity of
TX logic will help TX efficiency since its memory is limited, and it will
reduce the TX circle's time of each packet and then firmware will have more
memory for TX since TX complete also need memeory.

This patch disable TX complete indication from firmware for htt data
packet, it will not have TX complete indication from firmware to ath10k.
It will cut the cost of bus bandwidth of TX complete and make the TX
logic of firmware simpler, it results in significant performance
improvement on TX path.

Udp TX throughout is 130Mbps without this patch, and it arrives
400Mbps with this patch.

The downside of this patch is the command "iw wlan0 station dump" will
show 0 for "tx retries" and "tx failed" since all tx packet's status
is success.

This patch only effect sdio chip, it will not effect PCI, SNOC etc.

Tested with QCA6174 SDIO with firmware
WLAN.RMH.4.4.1-00017-QCARMSWPZ-1

Signed-off-by: Wen Gong <wgong@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/20200212080415.31265-2-wgong@codeaurora.org

ath10k: Fill GCMP MIC length for PMF

GCMP MIC length is not filled for GCMP/GCMP-256 cipher suites in
PMF enabled case. Due to mismatch in MIC length, deauth/disassoc frames
are unencrypted.
This patch fills proper MIC length for GCMP/GCMP-256 cipher suites.

Tested HW: QCA9984, QCA9888
Tested FW: 10.4-3.6-00104

Signed-off-by: Yingying Tang <yintang@codeaurora.org>
Co-developed-by: Sowmiya Sree Elavalagan <ssreeela@codeaurora.org>
Signed-off-by: Sowmiya Sree Elavalagan <ssreeela@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

ath10k: add mic bytes for pmf management packet

For PMF case, the action,deauth,disassoc management need to encrypt
by hardware, it need to reserve 8 bytes for encryption, otherwise
the packet will be sent out with error format, then PMF case will
fail.

After add the 8 bytes, it will pass the PMF case.

Tested with QCA6174 SDIO with firmware
WLAN.RMH.4.4.1-00005-QCARMSWP-1.

Signed-off-by: Wen Gong <wgong@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

ath10k: add htt_h2t_aggr_cfg_msg op for high latency devices

Without this op, it will not be possible to configure aggregation for
high latency devices.

Signed-off-by: Erik Stromdahl <erik.stromdahl@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

ath10k: add inline wrapper for htt_h2t_aggr_cfg_msg

This is done in order to make the *htt_h2t_aggr_cfg_msg* op align better
with the rest of the htt ops (whom all have inline wrappers).

It also adds support for the case when the op is missing (function
pointer is NULL).

As a result of this, the name of the 32 bit implementation in htt_tx.c
was changed and the function was made static.

Signed-off-by: Erik Stromdahl <erik.stromdahl@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

ath10k: Added support to reset HTT stats in debugfs

Reset HTT stats helps to get the aggregated HTT stats via
tracing and also we can clear the accumulated HTT stats with
this debugfs file.

Signed-off-by: Maharaja Kennadyrajan <mkenna@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

ath10k: Extended the HTT stats support to retrieve Mu-MIMO related stats

Extended the bit mask value of the HTT stats to get the Mu-MIMO
related stats via tracing.

Signed-off-by: Maharaja Kennadyrajan <mkenna@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

ath10k: fix use-after-free on SDIO data frames

With SDIO there's a use after free after a data frame is transfered, call stack
below. This happens because ath10k_htt_tx_hl() directly transmits the skb
provided by mac80211 using ath10k_htc_send(), all other HTT functions use
separate skb created with ath10k_htc_alloc_skb() to transmit the HTC packet.
After the packet is transmitted mac80211 frees the skb in ieee80211_tx_status()
but HTT layer expects that it still owns the skb, and frees it in
ath10k_htt_htc_tx_complete().

To fix this take a reference of skb before sending it to HTC layer to make sure
we still own the skb.

Tested on QCA6174 SDIO with firmware WLAN.RMH.4.4.1-00007-QCARMSWP-1.
ath10k_htt_tx_hl() is only used by SDIO and USB so other busses (PCI, AHB and
SNOC) should be unaffected.

call stack of use-after-free:
dump_backtrace+0x0/0x2d8
show_stack+0x20/0x2c
__dump_stack+0x20/0x28
dump_stack+0xc8/0xec
print_address_description+0x74/0x240
kasan_report+0x258/0x274
__asan_report_load4_noabort+0x20/0x28
skb_pull+0xbc/0x114
ath10k_htc_notify_tx_completion+0x190/0x2a4 [ath10k_core]
ath10k_sdio_write_async_work+0x1e4/0x2c4 [ath10k_sdio]
process_one_work+0x3d8/0x8b0
worker_thread+0x518/0x7e0
kthread+0x260/0x278
ret_from_fork+0x10/0x18

Allocated by one task:
kasan_kmalloc+0xa0/0x13c
kasan_slab_alloc+0x14/0x1c
kmem_cache_alloc+0x144/0x208
__alloc_skb+0xec/0x394
alloc_skb_with_frags+0x8c/0x374
sock_alloc_send_pskb+0x520/0x5d4
sock_alloc_send_skb+0x40/0x50
__ip_append_data+0xf5c/0x1858
ip_make_skb+0x194/0x1d4
udp_sendmsg+0xf24/0x1ab8
inet_sendmsg+0x1b0/0x2e0
sock_sendmsg+0x88/0xa0
__sys_sendto+0x220/0x3a8
__arm64_sys_sendto+0x78/0x80
el0_svc_common+0x120/0x1e0
el0_svc_compat_handler+0x64/0x80
el0_svc_compat+0x8/0x18

Freed by another task:
__kasan_slab_free+0x120/0x1d4
kasan_slab_free+0x10/0x1c
kmem_cache_free+0x74/0x504
kfree_skbmem+0x88/0xc8
__kfree_skb+0x24/0x2c
consume_skb+0x114/0x18c
__ieee80211_tx_status+0xb7c/0xf60 [mac80211]
ieee80211_tx_status+0x224/0x270 [mac80211]
ath10k_txrx_tx_unref+0x564/0x950 [ath10k_core]
ath10k_htt_t2h_msg_handler+0x178c/0x2a38 [ath10k_core]
ath10k_htt_htc_t2h_msg_handler+0x20/0x30 [ath10k_core]
ath10k_sdio_irq_handler+0xcc0/0x1654 [ath10k_sdio]
process_sdio_pending_irqs+0xec/0x358
sdio_run_irqs+0x68/0xe4
sdio_irq_work+0x1c/0x28
process_one_work+0x3d8/0x8b0
worker_thread+0x518/0x7e0
kthread+0x260/0x278
ret_from_fork+0x10/0x18

Reported-by: Wen Gong <wgong@codeaurora.org>
Tested-by: Wen Gong <wgong@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

ath10k: htt: support MSDU ids with SDIO

Transmit completion for SDIO is similar to PCIe, modify the high
latency path to allow SDIO modules to use the msdu id.

kvalo: the original patch from Alagu enabled this only for SDIO but I'm not
sure should we also enable this with USB. I'll use bus params to enable this
for so that it's easy to enable also for USB later.

Tested with QCA6174 SDIO with firmware WLAN.RMH.4.4.1-00007-QCARMSWP-1.

Co-developed-by: Wen Gong <wgong@codeaurora.org>
Signed-off-by: Alagu Sankar <alagusankar@silex-india.com>
Signed-off-by: Wen Gong <wgong@codeaurora.org>.
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

ath10k: switch to use SPDX license identifiers

Use SPDX identifiers everywhere in ath10k.

Makefile was incorrectly marked in commit b24413180f56 ("License cleanup: add
SPDX GPL-2.0 license identifier to files with no license"), fix that as well.

Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

ath10k: disable interface pause wow config for integrated chipset

wow pause iface config controls the PCI D0/D3-WOW cases for pcie
bus state. Firmware does not expects WOW_IFACE_PAUSE_ENABLED config
for bus/link that cannot be suspended ex:snoc and does not trigger
common subsystem shutdown.
Disable interface pause wow config for integrated chipset(WCN3990)
for correct WOW configuration in the firmware.

Testing:
Tested on WCN3990 HW.
Tested FW: WLAN.HL.2.0-01192-QCAHLSWMTPLZ-1.

Signed-off-by: Govind Singh <govinds@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

ath10k: Add support for extended HTT aggr msg support

HTT aggr message parameter in HL2.0 fw are different in comparison
to legacy fw version. Fill correct HTT aggr msg parameter for
targets using HL2.0 firmware.

Signed-off-by: Govind Singh <govinds@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

ath10k: Set DMA address mask to 35 bit for WCN3990

WCN3990 is a 37-bit target but can address memory range
only upto 35 bits. The 36th bit is used to control the
smmu/iommu translation and the 37th bit is used by the
internal bus masters to access the wifi subsystem internal
SRAM. With the DMA mask set to 37i-bit, the host driver
can get 37-bit dma address, which leads to incorrect
address access in the target.

Hence the host driver can used addresses upto 35-bit
for WCN3990. Fix the dma mask for wcn3990 to 35-bit,
instead of 37-bit.

Tested HW: WCN3990
Tested FW: WLAN.HL.2.0-01188-QCAHLSWMTPLZ-1

Tested-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Rakesh Pillai <pillair@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

ath10k: htt: High latency TX support

Add HTT TX function for HL interfaces.
Intended for SDIO and USB.

Signed-off-by: Erik Stromdahl <erik.stromdahl@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

ath10k: htt: RX ring config HL support

Special HTT RX ring config message used by high latency
devices.

The main difference between HL and LL is that HL devices
do not use shared memory between device and host and thus,
no host paddr's are added to the RX config message.

Signed-off-by: Erik Stromdahl <erik.stromdahl@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

ath10k: add HTT TX HL ops

Initial HTT TX ops for high latency devices.

Signed-off-by: Erik Stromdahl <erik.stromdahl@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

ath10k: DMA related fixes for high latency devices

Several DMA related functions (such as the dma_map_xxx functions)
are not used with high latency devices and don't need to be invoked
in this case.

Signed-off-by: Erik Stromdahl <erik.stromdahl@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

ath10k: htt_tx: move lock into id_get function

This is only code refactoring as all call sites of
ath10k_htt_tx_alloc_msdu_id() take the same lock it can be moved into the
id_get function and the assertion dropped.

Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

ath10k: fix bug in masking of TID value

Although the TID mask is 0xf, the modulus operation does still not
produce identical results as the bitwise and operator. If the TID is 15, the
modulus operation will "convert" it to 0, whereas the bitwise and will keep it
as 15.

This was found during code review.

Signed-off-by: Erik Stromdahl <erik.stromdahl@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

ath10k: htt_tx: mark expected switch fall-throughs

In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.

Notice that in this particular case, I replaced "pass through" with
a proper "fall through" comment, which is what GCC is expecting
to find.

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

ath10k: enable hw checksum for wcn3990

By default ath10k driver enables the support for HW_CHECKSUM
(NETIF_F_HW_CSUM). Since the TCP/UDP checksum calculation is not enabled
in the wcn3990 firmware the checksum is incorrect in the TCP/UDP packets
and all patckets are dropped. But due note that wcn3990 support in
ath10k is still incomplete so this isn't a critical fix (yet).

Enable hw checksum calculations in wcn3990 hardware by
setting the proper flags in msdu descriptor tso flags.

Signed-off-by: Rakesh Pillai <pillair@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

ath10k: add inlined wrappers for htt tx ops

These wrappers makes the HTT ops align better with the HIF ops
(where similar wrappers are used).

It also makes it easier for a target to have unsupported ops
(by letting the corresponding function pointer be NULL).

Signed-off-by: Erik Stromdahl <erik.stromdahl@gmail.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

ath10k: update copyright year

Update year for Qualcomm Atheros, Inc. copyrights.

Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: Add support for htt_data_tx_desc_64 descriptor

WCN3990 target uses 64 bit frags_paddr in htt tx descriptor,
which holds the physical address of SKB fragments in tx data path.

In order to support 64 bit bit frags_paddr in htt tx descriptor, define
htt_data_tx_desc_64 descriptor and ath10k_htt_tx_64 method for handling
tx data path with new descriptor fields.

Signed-off-by: Govind Singh <govinds@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: Add support for 64 bit HTT frag descriptor

WCN3990 target uses 64 bit frag descriptor and more
fields in TSO flag.
Add support for 64 bit HTT frag descriptor.

Signed-off-by: Govind Singh <govinds@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: Add support for 64 bit htt rx ring cfg

WCN3900 target uses 64bit rx_ring_base_paddr and
fw_idx_shadow_reg_paddr fields in HTT rx ring cfg message.
These address points to the memory region where remote
ring empty buffers are allocated.
In order to add 64 bit htt rx ring cfg, define separate
64 bit htt rx ring cfg message and attach it in runtime
based on target_64bit hw param flag.

Signed-off-by: Govind Singh <govinds@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: fix block comments style

Fix output from checkpatch.pl like:
Block comments use a trailing */ on a separate lin

Signed-off-by: Marcin Rokicki <marcin.rokicki@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: Avoid potential page alloc BUG_ON in tx free path

'ath10k_htt_tx_free_cont_txbuf' and 'ath10k_htt_tx_free_cont_frag_desc'
have NULL pointer checks to avoid crash if they are called twice
but this is as of now not sufficient as these pointers are not assigned
to NULL once the contiguous DMA memory allocation is freed, fix this.
Though this may not be hit with the explicity check of state variable
'tx_mem_allocated' check, good to have this addressed as well.

Below BUG_ON is hit when the above scenario is simulated
with kernel debugging enabled

page:f6d09a00 count:0 mapcount:-127 mapping: (null)
index:0x0
flags: 0x40000000()
page dumped because: VM_BUG_ON_PAGE(page_ref_count(page)
== 0)
------------[ cut here ]------------
kernel BUG at ./include/linux/mm.h:445!
invalid opcode: 0000 [#1] SMP DEBUG_PAGEALLOC
EIP is at put_page_testzero.part.88+0xd/0xf
Call Trace:
[<c118a2cc>] __free_pages+0x3c/0x40
[<c118a30e>] free_pages+0x3e/0x50
[<c10222b4>] dma_generic_free_coherent+0x24/0x30
[<f8c1d9a8>] ath10k_htt_tx_free_cont_txbuf+0xf8/0x140

[<f8c1e2a9>] ath10k_htt_tx_destroy+0x29/0xa0

[<f8c143e0>] ath10k_core_destroy+0x60/0x80 [ath10k_core]
[<f8acd7e9>] ath10k_pci_remove+0x79/0xa0 [ath10k_pci]
[<c13ed7a8>] pci_device_remove+0x38/0xb0
[<c14d3492>] __device_release_driver+0x72/0x100
[<c14d36b7>] driver_detach+0x97/0xa0
[<c14d29c0>] bus_remove_driver+0x40/0x80
[<c14d427a>] driver_unregister+0x2a/0x60
[<c13ec768>] pci_unregister_driver+0x18/0x70
[<f8aced4f>] ath10k_pci_exit+0xd/0x2be [ath10k_pci]
[<c1101e78>] SyS_delete_module+0x158/0x210
[<c11b34f1>] ? __might_fault+0x41/0xa0
[<c11b353b>] ? __might_fault+0x8b/0xa0
[<c1001a4b>] do_fast_syscall_32+0x9b/0x1c0
[<c178da34>] sysenter_past_esp+0x45/0x74

Signed-off-by: Mohammed Shafi Shajakhan <mohammed@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: fix Tx DMA alloc failure during continuous wifi down/up

With maximum number of vap's configured in a two radio supported
systems of ~256 Mb RAM, doing a continuous wifi down/up and
intermittent traffic streaming from the connected stations results
in failure to allocate contiguous memory for tx buffers. This results
in the disappearance of all VAP's and a manual reboot is needed as
this is not a crash (or) OOM(for OOM killer to be invoked). To address
this allocate contiguous memory for tx buffers one time and re-use them
until the modules are unloaded but this results in a slight increase in
memory footprint of ath10k when the wifi is down, but the modules are
still loaded. Also as of now we use a separate bool 'tx_mem_allocated'
to keep track of the one time memory allocation, as we cannot come up
with something like 'ath10k_tx_{register,unregister}' before
'ath10k_probe_fw' is called as 'ath10k_htt_tx_alloc_cont_frag_desc'
memory allocation is dependent on the hw_param 'continuous_frag_desc'

a) memory footprint of ath10k without the change

lsmod | grep ath10k
ath10k_core 414498 1 ath10k_pci
ath10k_pci 38236 0

b) memory footprint of ath10k with the change

ath10k_core 414980 1 ath10k_pci
ath10k_pci 38236 0

Memory Failure Call trace:

hostapd: page allocation failure: order:6, mode:0xd0
[<c021f150>] (__dma_alloc_buffer.isra.23) from
[<c021f23c>] (__alloc_remap_buffer.isra.26+0x14/0xb8)
[<c021f23c>] (__alloc_remap_buffer.isra.26) from
[<c021f664>] (__dma_alloc+0x224/0x2b8)
[<c021f664>] (__dma_alloc) from [<c021f810>]
(arm_dma_alloc+0x84/0x90)
[<c021f810>] (arm_dma_alloc) from [<bf954764>]
(ath10k_htt_tx_alloc+0xe0/0x2e4 [ath10k_core])
[<bf954764>] (ath10k_htt_tx_alloc [ath10k_core]) from
[<bf94e6ac>] (ath10k_core_start+0x538/0xcf8 [ath10k_core])
[<bf94e6ac>] (ath10k_core_start [ath10k_core]) from
[<bf947eec>] (ath10k_start+0xbc/0x56c [ath10k_core])
[<bf947eec>] (ath10k_start [ath10k_core]) from
[<bf8a7a04>] (drv_start+0x40/0x5c [mac80211])
[<bf8a7a04>] (drv_start [mac80211]) from [<bf8b7cf8>]
(ieee80211_do_open+0x170/0x82c [mac80211])
[<bf8b7cf8>] (ieee80211_do_open [mac80211]) from
[<c056afc8>] (__dev_open+0xa0/0xf4)
[21053.491752] Normal: 641*4kB (UEMR) 505*8kB (UEMR) 330*16kB (UEMR)
126*32kB (UEMR) 762*64kB (UEMR) 237*128kB (UEMR) 1*256kB (M) 0*512kB
0*1024kB 0*2048kB 0*4096kB = 95276kB

Signed-off-by: Mohammed Shafi Shajakhan <mohammed@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: remove extraneous error message in tx alloc

Remove extraneous error message in 'ath10k_htt_tx_alloc_cont_frag_desc'
as the caller 'ath10k_htt_tx_alloc' already dumps a proper error
message

Signed-off-by: Mohammed Shafi Shajakhan <mohammed@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: clean up HTT tx buffer allocation and free

cleanup 'ath10k_htt_tx_alloc' by introducing the API's
'ath10k_htt_tx_alloc/free_{cont_txbuf, txdone_fifo} and
re-use them whereever needed

Signed-off-by: Mohammed Shafi Shajakhan <mohammed@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: implement NAPI support

Add NAPI support for rx and tx completion. NAPI poll is scheduled
from interrupt handler. The design is as below

- on interrupt
- schedule napi and mask interrupts
- on poll
- process all pipes (no actual Tx/Rx)
- process Rx within budget
- if quota exceeds budget reschedule napi poll by returning budget
- process Tx completions and update budget if necessary
- process Tx fetch indications (pull-push)
- push any other pending Tx (if possible)
- before resched or napi completion replenish htt rx ring buffer
- if work done < budget, complete napi poll and unmask interrupts

This change also get rid of two tasklets (intr_tq and txrx_compl_task).

Measured peak throughput with NAPI on IPQ4019 platform in controlled
environment. No noticeable reduction in throughput is seen and also
observed improvements in CPU usage. Approx. 15% CPU usage got reduced
in UDP uplink case.

DL: AP DUT Tx
UL: AP DUT Rx

IPQ4019 (avg. cpu usage %)

========
TOT +NAPI
=========== =============
TCP DL 644 Mbps (42%) 645 Mbps (36%)
TCP UL 673 Mbps (30%) 675 Mbps (26%)
UDP DL 682 Mbps (49%) 680 Mbps (49%)
UDP UL 720 Mbps (28%) 717 Mbps (11%)

Signed-off-by: Rajkumar Manoharan <rmanohar@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: ensure txrx-compl-task is stopped when cleaning htt-tx

Otherwise, the txrx-compl-task may access some bad memory?

Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: fix potential null dereference bugs

Smatch warns about a number of cases in ath10k where a pointer is
null-checked after it has already been dereferenced, in code involving
ath10k private virtual interface pointers.

Fix these by making the dereference happen later.

Addresses the following smatch warnings:

drivers/net/wireless/ath/ath10k/mac.c:3651 ath10k_mac_txq_init() warn: variable dereferenced before check 'txq' (see line 3649)
drivers/net/wireless/ath/ath10k/mac.c:3664 ath10k_mac_txq_unref() warn: variable dereferenced before check 'txq' (see line 3659)
drivers/net/wireless/ath/ath10k/htt_tx.c:70 __ath10k_htt_tx_txq_recalc() warn: variable dereferenced before check 'txq->sta' (see line 52)
drivers/net/wireless/ath/ath10k/htt_tx.c:740 ath10k_htt_tx_get_vdev_id() warn: variable dereferenced before check 'cb->vif' (see line 736)
drivers/net/wireless/ath/ath10k/txrx.c:86 ath10k_txrx_tx_unref() warn: variable dereferenced before check 'txq' (see line 84)
drivers/net/wireless/ath/ath10k/wmi.c:1837 ath10k_wmi_op_gen_mgmt_tx() warn: variable dereferenced before check 'cb->vif' (see line 1825)

Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: move fw_features to struct ath10k_fw_file

Preparation for testmode.c to use ath10k_core_fetch_board_data_api_n().

Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: speedup htt rx descriptor processing for tx completion

To optimize CPU usage htt rx descriptors will be reused instead of
refilling it for htt rx copy engine (CE5). To support that all htt rx
indications should be processed at same context. FIFO queue is used
to maintain tx completion status for each msdu. This helps to retain
the order of tx completion.

Signed-off-by: Rajkumar Manoharan <rmanohar@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: move mgmt descriptor limit handle under mgmt_tx

Frames that are transmitted via MGMT_TX are using reserved descriptor
slots in firmware. This limitation is for the htt_mgmt_tx path itself,
not for mgmt frames per se. In 16 MBSSID scenario, these reserved slots
will be easy exhausted due to frequent probe responses. So for 10.4
based solutions, probe responses are limited by a threshold (24).

management tx path is separate for all except tlv based solutions. Since
tlv solutions (qca6174 & qca9377) do not support 16 AP interfaces, it is
safe to move management descriptor limitation check under mgmt_tx
function. Though CPU improvement is negligible, unlikely conditions or
never hit conditions in hot path can be avoided on data transmission.

Signed-off-by: Rajkumar Manoharan <rmanohar@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: implement push-pull tx

The current/old tx path design was that host, at
its own leisure, pushed tx frames to the device.
For HTT there was ~1000-1400 msdu queue depth.

After reaching that limit the driver would request
mac80211 to stop queues. There was little control
over what packets got in there as far as
DA/RA was considered so it was rather easy to
starve per-station traffic flows.

With MU-MIMO this became a significant problem
because the queue depth was insufficient to buffer
frames from multiple clients (which could have
different signal quality and capabilities) in an
efficient fashion.

Hence the new tx path in 10.4 was introduced: a
pull-push mode.

Firmware and host can share tx queue state via
DMA. The state is logically a 2 dimensional array
addressed via peer_id+tid pair. Each entry is a
counter (either number of bytes or packets. Host
keeps it updated and firmware uses it for
scheduling Tx pull requests to host.

This allows MU-MIMO to become a lot more effective
with 10+ clients.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: implement updating shared htt txq state

Firmware 10.4.3 onwards can support a pull-push Tx
model where it shares a Tx queue state with the
host.

The host updates the DMA region it pointed to
during HTT setup whenever number of software
queued from (on host) changes. Based on this
information firmware issues fetch requests to the
host telling the host how many frames from a list
of given stations/tids should be submitted to the
firmware.

The code won't be called because not all
appropriate HTT events are processed yet.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: add new htt message generation/parsing logic

This merely adds some parsing, generation and
sanity checks with placeholders for real
code/functionality to be added later.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: refactor tx pending management

Tx pending counter logic assumed that the sk_buff
is already known and hence was performed in HTT
functions themselves.

However, for the sake of future wake_tx_queue()
usage the driver must be able to tell whether it
can submit more frames to firmware before it
dequeues frame from ieee80211_txq (and thus long
before HTT Tx functions are called) because once a
frame is dequeued it cannot be requeud back to
mac80211.

This prepares the driver for future changes.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: implement basic support for new tx path firmware

This allows to use the new firmware which
implements the new tx data path. Without this
patch firmware supporting new tx path stops
responding shortly after booting.

This patch doesn't implement the entire pull-push
logic available in the new firmware. This will be
done in subsequent patches.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: clean up cont frag desc init code

This makes the code easier to extend and re-use.

While at it fix _warn to _err. Other than that
there are no functional changes.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: stop abusing GFP_DMA

Allocations from the DMA zone were originally added for legacy ISA
stuff, or PCI devices that have specific limitations in their DMA
addressing capabilities. It has no place in ath10k, which can do
full 32-bit DMA.

Fixes memory allocation errors on some platforms.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: store msdu_id instead of txbuf pointers

Txbuf is no longer a DMA pool and can be easily
tracked with a mere msdu_id. This saves 10 bytes
on 64bit systems and 6 bytes on 32bit systems of
precious sk_buff control buffer.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: replace vdev_id and tid in skb cb

This prepares the driver for future ieee80211_txq
and wake_tx_queue() support.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: pack up flags in skb_cb

It was wasteful to have all the flags as separate
bools.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: remove freq from skb_cb

It was wasteful to keep it in the struct.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: remove txmode from skb_cb

It was wasteful to keep it in the struct because
it can be passed as function argument down the tx
path.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: merge is_protected with nohwcrypt

It was wasteful to have two flags describing
the same thing.

While at it fix code style of
ath10k_tx_h_use_hwcrypto().

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: fix peerid configuration in htt tx desc for htt version < 3.4

Of a word in struct htt_data_tx_desc htt version >= 3.4 firmware uses
LSB 16-bit for frequency configuration which is used for offchannel tx
and MSB 16-bit is for peerid. But other firmwares using version 2.X
(10.1, 10.2.2, 10.2.4 and 10.4) are using 32-bit for peerid in htt tx
desc. So far no issue is found with the existing code setting peerid and
freq for HTT version 2.X, this could be mainly because of 0 as frequecy
(home channel) is being always passed with those firmwares. There may be
issues when non-zero freq is passed with firmware using < 3.4 htt version.
To be safe use target_version_major and target_version_minor along with
htt-op-version before configuring peer id and freq in htt tx desc. This
patch extends ath10k_mac_tx_frm_has_freq() to check for htt_op_version_tlv
and uses the helper while setting peerid in htt_tx_desc.

Fixes: 8d6d36243610 ("ath10k: fix offchan reliability")
Signed-off-by: Vasanthakumar Thiagarajan <vthiagar@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: set peer MFP flag in peer assoc command

Set peer's management frame protection flag in peer assoc command,
this setting will enable/disable encrytion of management frames in fw.

Setting of this flag is based on whether MFP is enabled/disabled at STA
and a firmware feature flag ATH10K_FW_FEATURE_MFP_SUPPORT. This is because
only firmwares 10.1.561 and above have support for MFP.

Signed-off-by: Tamizh chelvam <c_traja@qti.qualcomm.com>
Signed-off-by: Manikanta pubbisetty <c_mpubbi@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: export htt tx rx handlers

Some special copy engines delivers messages directly to HTT by
bypassing HTC layer. Hence exporting tx_completion and rx_handler
for delivering the data to HTT layer.

Reviewed-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Rajkumar Manoharan <rmanohar@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: use pre-allocated DMA buffer in Tx

ath10k driver is using dma_pool_alloc per packet and dma_pool_free
in coresponding at Tx completion.
Use of pre-allocated DMA buffer in Tx will improve saving CPU resource
by 5% while it consumes about 56KB memory more as trade off.

Signed-off-by: Peter Oh <poh@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: brace style fixes

drivers/net/wireless/ath/ath10k/htt_tx.c:457: braces {} are not necessary for single statement blocks
drivers/net/wireless/ath/ath10k/htt_tx.c:545: braces {} are not necessary for single statement blocks
drivers/net/wireless/ath/ath10k/mac.c:200: braces {} are not necessary for single statement blocks

Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: check for encryption before adding MIC_LEN

In the case of raw mode without nohwcrypt parameter, we
should still make sure the frame is protected before
adding MIC_LEN to avoid skb_under_panic errors.

Signed-off-by: Bob Copeland <me@bobcopeland.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: drop probe responses when too many are queued

In a noisy environment, when multiple interfaces are created,
the management tx descriptors are fully occupied by the probe
responses from all the interfaces. This prevents a new station
from a successful association.

Fix this by limiting the probe responses when the specified
threshold limit is reached.

Signed-off-by: Vivek Natarajan <nataraja@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: fix dma_mapping_error() handling

The function returns 1 when DMA mapping fails. The
driver would return bogus values and could
possibly confuse itself if DMA failed.

Fixes: 767d34fc67af ("ath10k: remove DMA mapping wrappers")
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: initialize msdu ext. descriptor before use

Initial QCA99X0 support has a known issue with TCP Tx throughput.
All other path such as UDP Tx/Rx and TCP Rx meet their expectation
(> 900Mbps), but TCP Tx marked as low as 5Mbps when single pair is
used on iperf.

The root cause is turned out because TSO flag is not initialized
properly so that firmware configures TSO in wrong way.
TSO flags in msdu extension descriptor is required to be reset
to indicate firmware there is no TSO is enabled, otherwise it
could act as TSO is enabled which causes huge throughput drop.

In fact, it's enough by resetting TSO flags only to prevent the
unexpected behavior, but initializing whole msdu ext. descriptor
will help to clear uncertainty of firmware could bring on as it
constantly updated.

Signed-off-by: Peter Oh <poh@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: enable raw encap mode and software crypto engine

This patch enables raw Rx/Tx encap mode to support software based
crypto engine. This patch introduces a new module param 'cryptmode'.

cryptmode:

0: Use hardware crypto engine globally with native Wi-Fi mode TX/RX
encapsulation to the firmware. This is the default mode.
1: Use sofware crypto engine globally with raw mode TX/RX
encapsulation to the firmware.

Known limitation:
A-MSDU must be disabled for RAW Tx encap mode to perform well when
heavy traffic is applied.

Testing: (by Michal Kazior <michal.kazior@tieto.com>)

a) Performance Testing

cryptmode=1
ap=qca988x sta=killer1525
killer1525 -> qca988x 194.496 mbps [tcp1 ip4]
killer1525 -> qca988x 238.309 mbps [tcp5 ip4]
killer1525 -> qca988x 266.958 mbps [udp1 ip4]
killer1525 -> qca988x 477.468 mbps [udp5 ip4]
qca988x -> killer1525 301.378 mbps [tcp1 ip4]
qca988x -> killer1525 297.949 mbps [tcp5 ip4]
qca988x -> killer1525 331.351 mbps [udp1 ip4]
qca988x -> killer1525 371.528 mbps [udp5 ip4]
ap=killer1525 sta=qca988x
qca988x -> killer1525 331.447 mbps [tcp1 ip4]
qca988x -> killer1525 328.783 mbps [tcp5 ip4]
qca988x -> killer1525 375.309 mbps [udp1 ip4]
qca988x -> killer1525 403.379 mbps [udp5 ip4]
killer1525 -> qca988x 203.689 mbps [tcp1 ip4]
killer1525 -> qca988x 222.339 mbps [tcp5 ip4]
killer1525 -> qca988x 264.199 mbps [udp1 ip4]
killer1525 -> qca988x 479.371 mbps [udp5 ip4]

Note:
- only open network tested for RAW vs nwifi performance comparison
- killer1525 (qca6174 hw2.2) is 2x2 device (hence max 866mbps)
- used iperf
- OTA, devices a few cm apart from each other, no shielding
- tcpX/udpX, X - means number of threads used

Overview:
- relative Tx performance drop is seen but is within reasonable and
expected threshold (A-MSDU must be disabled with RAW Tx)

b) Connectivity Testing

cryptmode=1
ap=iwl6205 sta1=qca988x crypto=open topology-1ap1sta OK
ap=iwl6205 sta1=qca988x crypto=wep1 topology-1ap1sta OK
ap=iwl6205 sta1=qca988x crypto=wpa topology-1ap1sta OK
ap=iwl6205 sta1=qca988x crypto=wpa-ccmp topology-1ap1sta OK
ap=qca988x sta1=iwl6205 crypto=open topology-1ap1sta OK
ap=qca988x sta1=iwl6205 crypto=wep1 topology-1ap1sta OK
ap=qca988x sta1=iwl6205 crypto=wpa topology-1ap1sta OK
ap=qca988x sta1=iwl6205 crypto=wpa-ccmp topology-1ap1sta OK
ap=iwl6205 sta1=qca988x crypto=open topology-1ap1sta2br OK
ap=iwl6205 sta1=qca988x crypto=wep1 topology-1ap1sta2br OK
ap=iwl6205 sta1=qca988x crypto=wpa topology-1ap1sta2br OK
ap=iwl6205 sta1=qca988x crypto=wpa-ccmp topology-1ap1sta2br OK
ap=qca988x sta1=iwl6205 crypto=open topology-1ap1sta2br OK
ap=qca988x sta1=iwl6205 crypto=wep1 topology-1ap1sta2br OK
ap=qca988x sta1=iwl6205 crypto=wpa topology-1ap1sta2br OK
ap=qca988x sta1=iwl6205 crypto=wpa-ccmp topology-1ap1sta2br OK
ap=iwl6205 sta1=qca988x crypto=open topology-1ap1sta2br1vlan OK
ap=iwl6205 sta1=qca988x crypto=wep1 topology-1ap1sta2br1vlan OK
ap=iwl6205 sta1=qca988x crypto=wpa topology-1ap1sta2br1vlan OK
ap=iwl6205 sta1=qca988x crypto=wpa-ccmp topology-1ap1sta2br1vlan OK
ap=qca988x sta1=iwl6205 crypto=open topology-1ap1sta2br1vlan OK
ap=qca988x sta1=iwl6205 crypto=wep1 topology-1ap1sta2br1vlan OK
ap=qca988x sta1=iwl6205 crypto=wpa topology-1ap1sta2br1vlan OK
ap=qca988x sta1=iwl6205 crypto=wpa-ccmp topology-1ap1sta2br1vlan OK

Note:
- each test takes all possible endpoint pairs and pings
- each pair-ping flushes arp table
- ip6 is used

c) Testbed Topology:

1ap1sta:
[ap] ---- [sta]

endpoints: ap, sta

1ap1sta2br:
[veth0] [ap] ---- [sta] [veth2]
| | | |
[veth1] | \ [veth3]
\ / \ /
[br0] [br1]

endpoints: veth0, veth2, br0, br1
note: STA works in 4addr mode, AP has wds_sta=1

1ap1sta2br1vlan:
[veth0] [ap] ---- [sta] [veth2]
| | | |
[veth1] | \ [veth3]
\ / \ /
[br0] [br1]
| |
[vlan0_id2] [vlan1_id2]

endpoints: vlan0_id2, vlan1_id2
note: STA works in 4addr mode, AP has wds_sta=1

Credits:

Thanks to Michal Kazior <michal.kazior@tieto.com> who helped find the
amsdu issue, contributed a workaround (already squashed into this
patch), and contributed the throughput and connectivity tests results.

Signed-off-by: David Liu <cfliu.tw@gmail.com>
Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Tested-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: Improve performance by reducing tx_lock contention

During tx completion, tx_lock is held for longer than required, preventing
efficient refill of htt->pending_tx. Refactor the code so that only MSDU
related operations are protected by the lock.

Improves downstream performance on a dual-core ARM Freescale LS1024A
(f.k.a. Mindspeed Comcerto 2000) AP with a 3x3 client from 495 to 580 Mbps.
Other CPU bound multicore systems may also benefit.

Signed-off-by: Denton Gentry <dgentry@google.com>
Signed-off-by: Avery Pennarun <apenwarr@google.com>
[mfaltesek@google.com: removed conflicting code for tracking msdu_ids.]
Signed-off-by: Marty Faltesek <mfaltesek@google.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: extend struct htt_mgmt_tx_dec for qca99x0

HTT_H2T_MSG_TYPE_MGMT_TX msg in 10.4 firmware carries additional
4 byte in htt_mgmt_tx_desc where it tells to firmware that at what
rate mgmt frame has to go out in the air. It's an optional parameter,
setting this field to zero will force firmware to choose auto rate
and send the frame out.

Those 4 byte info is missed out in the current code and 10.4 firmware
ended up reading some junk in those 4 byte and sometime malfunctioning.

Fix it by adding 4 byte in struct htt_mgmt_tx_desc. Non 10.4 firmware
will not process those four byte. So, adding 4 byte at the end of
struct htt_mgmt_tx_desc will not create any impact on other chipset.

Signed-off-by: Raja Mani <rmani@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: add TCP/UDP Checksum offload support for QCA99x0

The patch adds support to offload TCP/UDP checksum
calculations for QCA99x0.

Signed-off-by: Manikanta Pubbisetty <c_mpubbi@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: update tx path to support QCA99X0

Since QCA99X0 uses fragmentation descriptor differently from
other ones on tx path, we need to handle it separately.

QCA99X0 is using 48 bits for address and 16 bits for length
out of 2 dword and each values have to be programmed by frag
desc base addr + msdu id, so that hardware can retrieve
corresponding frag data.

Signed-off-by: Peter Oh <poh@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: configure frag desc memory to target for qca99X0

Pre qca99X0 chipsets follows the model where dynamically allocate
memory for frag desc on getting new skb for TX. But, this is not
going to be the case in qca99X0. It expects frag desc memory to be
allocated at boot time and let the driver to reuse allocated memory
after every TX completion. So there won't be any dynamic frag memory
memory allocation in qca99X0 during data transmission.

qca99X0 hardware doesn't need fragment desc address to be programmed
in msdu descriptor for every data transaction. It needs to know only
starting address of fragment descriptor at the time of the boot.
During data transmission, qca99X0 hardware can retrieve corresponding
frag addr by adding programmed frag desc base addr + msdu id.

Allocate continuous fragment descriptor memory (same size as number of
descriptor) at the time of target initialization and configure allocated
dma address to the target via HTT_H2T_MSG_TYPE_FRAG_DESC_BANK_CFG.

How this is allocated continuous memory is going to be used is not
covered in this patch. It just allocates memory and hand over to firmware.
If we don't do it at init time, qca99X0 will stall when firmware tries
to do TX.

Signed-off-by: Raja Mani <rmani@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: rework tx queue locking

Tx queue locking was very simple until now.
Multi-channel support will require a more flexible
and fine grained control.

This introduces a per-hw and per-vif (each with a
bitmask of reasons) tx queue locking.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: unify tx mode and dispatch

There are a few different tx paths depending on
firmware and frame itself.

Creating a uniform decision will make it possible
to switch between different txmode easier, both
for testing and for future features as well.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Marek Puzyniak <marek.puzyniak@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: Use TX cksum offload only for CHECKSUM_PARTIAL

Otherwise ath10k will just checksum everything even if it did not
go through the TCP/IP stack (for example bridged frames). In the worst
case this could mean recreating the checksum for incorrect data.

Signed-off-by: Helmut Schaa <helmut.schaa@googlemail.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: fix pmf for wmi-tlv on qca6174

New wmi-tlv firmware uses HTT 3.0 protocol which
uses TX_FRM command for management frames (instead
of a dedicated command). To support PMF it is
necessary to provide explicit tailroom.

Signed-off-by: Marek Kwaczynski <marek.kwaczynski@tieto.com>
Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: use idr api for msdu_ids

HTT Tx protocol uses arbitrary host assigned ids
too associate with MSDUs when delivering
completions.

Instead of rolling out own id generation scheme
use the tools provided in kernel.

This should have little to no effect on
performance.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: fix error return code

Return a negative error code on failure.

A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)

// <smpl>
@@
identifier ret; expression e1,e2;
@@
(
if (\(ret < 0\|ret != 0\))
{ ... return ret; }
|
ret = 0
)
... when != ret = e1
when != &ret
*if(...)
{
... when != ret = e2
when forall
return ret;
}
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: set max_num_pending_tx in ath10k_core_init_firmware_features()

Better to have this in same place as other firmware interface handling.

Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: fix offchan reliability

New firmware revisions don't need peer creation
when doing offchannel tx. Earlier revisions would
queue and never release frames without a peer.

This prevent new firmware revisions from stopping
replenishing wmi-htc tx credits and improves
reliability of offchannel tx which would sometimes
silently fail.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: handle ieee80211 header and payload tracing separately

For packet log, the transmitted frame 802.11 header alone is sufficient.
Recording entire packet is also consuming lot of disk space. To optimize
this, tx and rx data tracepoints are splitted into header and payload
tracepoints.

To record tx ieee80211 headers

trace-cmd record -e ath10k_tx_hdr

To record complete packets

trace-cmd record -e ath10k_tx_hdr -e ath10k_tx_payload

Cc: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Rajkumar Manoharan <rmanohar@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: speed up hw recovery

In some cases hw recovery was taking an absurdly
long time due to ath10k waiting for things that
would never really complete.

Instead of waiting for inevitable timeouts poke
all completions and wakequeues and check if it's
still worth waiting.

Reading/writing ar->state requires conf_mutex.
Since waiters might be holding it introduce a new
flag CRASH_FLUSH so it's possible to tell waiters
to abort whatever they were waiting for.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: add tracing for frame transmission

Add tracing support to forward management and data frames to
user space for packet inspection.

Signed-off-by: Rajkumar Manoharan <rmanohar@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: add tracing for tx info

The tx info such as msdu_id, frame len, vdev id and tid are reported
to user space by tracepoint. This is useful for collecting tx
statistics.

Signed-off-by: Rajkumar Manoharan <rmanohar@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: don't use return on void functions

Fixes a checkpatch warning:

WARNING: void function return statements are not generally useful

Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: fix use of multiple blank lines

Fixes checkpatch warnings:

CHECK: Please don't use multiple blank lines

Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: improve logging to include dev id

This makes it a lot easier to log and debug
messages if there's more than 1 ath10k device on a
system.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: prevent some tx flushing failures

Firmware could request inspection of some
submitted tx requests. Since the callback wasn't
implemented it was possible to bleed tx msdu_ids
which could translate to tx flushing timeouts.

There's nothing ath10k can do to help firmware
with tx processing now so just report all tx
frames as already inspected to prevent firmware
from sending up inspection events and force it to
report regular tx completion indications with
discard status.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: add implementation for configure max amsdu, ampdu

Allow to setup maximum subframes for AMSDU and AMPDU aggregation
via debugfs htt_max_amsdu_ampdu file.

Eg.
echo "2 64" > htt_max_amsdu_ampdu
will setup maximum amsdu subframes equal 2 and
maximum ampdu subframes equal to 64.

Signed-off-by: Janusz Dziedzic <janusz.dziedzic@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: fix core start sequence

It was possible to call hif_stop() 2 times through
ath10k_htc_connect_init() timeout failpath which
could lead to double free_irq() kernel splat for
multiple MSI interrupt case.

Re-order init sequence to avoid this problem. The
HTC stop shouldn't stop HIF implicitly since it
doesn't implicitly start it. Since the re-ordering
required some functions to be split/removed/renamed
rename a few functions to make more sense while at
it.

Reported-By: Ben Greear <greearb@candelatech.com>
Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: reduce htt tx/rx spinlock overhead

It is inefficient to grab irqsave spinlocks for
skb lists for each queue/dequeue action.

Using rx_ring.lock and tx_lock allows to use less
heavy bh spinlock functions and moving locking
upwards allows to toggle spinlocks less often.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: bypass htc for htt tx path

Going through full htc tx path for htt tx is a
waste of resources. By skipping it it's possible
to easily submit scatter-gather to the pci hif for
reduced host cpu load and improved performance.

The new approach uses dma pool to store the
following metadata for each tx request:
* msdu fragment list
* htc header
* htt tx command

The htt tx command contains a msdu prefetch.
Instead of copying it original mapped msdu address
is used to submit a second scatter-gather item to
hif to make a complete htt tx command.

The htt tx command itself hands over dma mapped
pointers to msdus and completion of the command
itself doesn't mean the frame has been sent and
can be unmapped/freed. This is why htc tx
completion is skipped for htt tx as all tx related
resources are freed upon htt tx completion
indication event (which also implicitly means htt
tx command itself was completed).

Since now each htt tx request effectively consists
of 2 copy engine items CE_HTT_H2T_MSG_SRC_NENTRIES
is updated to allow maximum of
TARGET_10X_NUM_MSDU_DESC msdus being queued. This
keeps the tx path resource management simple.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: remove DMA mapping wrappers

There's no real benefit from using them. DMA-API
already provides debugging. Some skbuffs are
already mapped directly with DMA-API since wrapper
arguments were insufficient and extending them
would be pointless.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: better tx/rx debugging

Make it easier to grep for htt rx errors.

Signed-off-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: fix FW crashes on heavy TX on 10.1.389 AP FW

10.1.389 firmware has some differences in
calculation of number of outstanding HTT TX
completions. This led to FW crashes of 10.1.389
while main firmware branch was unnaffected.

The patch makes sure ath10k doesn't queue up more
MSDUs than it should.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: bring back the WMI path for mgmt frames

This is still the only way to submit mgmt frames in case
of 10.X firmware.

This patch introduces wmi_mgmt_tx queue, because of the
fact WMI command can block. This is a problem for
ath10k_tx_htt(), since it's called from atomic context.
The skb queue and worker are introduced to move the mgmt
frame handling out of .tx callback context and not block.

Signed-off-by: Bartosz Markowski <bartosz.markowski@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: use msdu headroom to store txfrag

Instead of allocating sk_buff for a mere 16-byte
tx fragment list buffer use headroom of the
original msdu sk_buff.

This decreases CPU cache pressure and improves
performance.

Measured improvement on AP135 is 560mbps ->
590mbps of UDP TX briding traffic.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: cleanup HTT TX functions

Use a saner goto scheme for failure handling. Also
group operations more sensibly.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: decouple HTT TX completions

Until now the all MSDU transfer related structures
were freed when all resources were unreferenced.

Now HTC transfer is freed independently and HTT
transfer is so too.

This yields a way more simpler ath10k_skb_cb and
should possibly enable parallel pipe processing
(which is now serialized in
ath10k_pci_process_ce routine).

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: avoid needless memset on TX path

This reduces number of memory accesses and
hopefully contributes to better performance in the
future.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: add boot messages to htt.c

To unify the boot debug level.

Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: add htt_stats_enable debugfs file

Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: add support for HTT 3.0

New firmware comes with new HTT protocol version.
In 3.0 the separate mgmt tx command has been
removed. All traffic is to be pushed through data
tx (tx_frm) command with a twist - FW seems to not
be able (yet?) to access tx fragment table so for
manamgement frames frame pointer is passed
directly.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: implement tx checksum offloading

HW supports L3/L4 tx checksum offloading.

This should reduce CPU load and improve
performance on slow host machines.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: embed HTT struct inside ath10k

This reduces number of allocations and simplifies
memory managemnt.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: embed HTC struct inside ath10k

This reduces number of allocations and simplifies
memory managemnt.

Signed-off-by: Michal Kazior <michal.kazior@tieto.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>

ath10k: mac80211 driver for Qualcomm Atheros 802.11ac CQA98xx devices

Here's a new mac80211 driver for Qualcomm Atheros 802.11ac QCA98xx devices.
A major difference from ath9k is that there's now a firmware and
that's why we had to implement a new driver.

The wiki page for the driver is:

http://wireless.kernel.org/en/users/Drivers/ath10k

The driver has had many authors, they are listed here alphabetically:

Bartosz Markowski <bartosz.markowski@tieto.com>
Janusz Dziedzic <janusz.dziedzic@tieto.com>
Kalle Valo <kvalo@qca.qualcomm.com>
Marek Kwaczynski <marek.kwaczynski@tieto.com>
Marek Puzyniak <marek.puzyniak@tieto.com>
Michal Kazior <michal.kazior@tieto.com>
Sujith Manoharan <c_manoha@qca.qualcomm.com>

Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>