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| author | Bhagavathi Perumal S <bperumal@codeaurora.org> | 2018-12-20 10:53:34 +0300 |
|---|---|---|
| committer | Kalle Valo <kvalo@codeaurora.org> | 2018-12-20 20:02:18 +0300 |
| commit | a2864772f33aa0f22914049b7fe777b7d4ec05ee (patch) | |
| tree | 90e893bf847b0a6599b3afa4172da5c18b057e35 /drivers/net/wireless/ath/ath10k/rx_desc.h | |
| parent | 68c295f21abc192163c416b333aca7c41a195075 (diff) | |
| download | linux-a2864772f33aa0f22914049b7fe777b7d4ec05ee.tar.xz | |
ath10k: fix warning due to msdu limit error
Some hardwares variants (QCA99x0) are limiting msdu deaggregation with
some threshold value(default limit in QCA99x0 is 64 msdus), it was introduced to
avoid excessive MSDU-deaggregation in error cases. When number of sub frames
exceeds the limit, target hardware will send all msdus starting from present
msdu in RAW format as a single msdu packet and it will be indicated with
error status bit "RX_MSDU_END_INFO0_MSDU_LIMIT_ERR" set in rx descriptor.
This msdu frame is a partial raw MSDU and does't have first msdu and ieee80211
header. It caused below warning message.
[ 320.151332] ------------[ cut here ]------------
[ 320.155006] WARNING: CPU: 0 PID: 3 at drivers/net/wireless/ath/ath10k/htt_rx.c:1188
In our issue case, MSDU limit error happened due to FCS error and generated
this warning message.
This fixes the warning by handling the MSDU limit error. If msdu limit error
happens, driver adds first MSDU's ieee80211 header and sets A-MSDU present bit
in QOS header so that upper layer processes this frame if it is valid or drop it
if FCS error set. And removed the warning message, hence partial msdus without
first msdu is expected in msdu limit error cases.
Tested on QCA9984, Firmware 10.4-3.6-00104
Signed-off-by: Bhagavathi Perumal S <bperumal@codeaurora.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Diffstat (limited to 'drivers/net/wireless/ath/ath10k/rx_desc.h')
| -rw-r--r-- | drivers/net/wireless/ath/ath10k/rx_desc.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath10k/rx_desc.h b/drivers/net/wireless/ath/ath10k/rx_desc.h index 310674de3cb8..dfbfe674e11e 100644 --- a/drivers/net/wireless/ath/ath10k/rx_desc.h +++ b/drivers/net/wireless/ath/ath10k/rx_desc.h @@ -572,6 +572,7 @@ struct rx_msdu_start { #define RX_MSDU_END_INFO0_REPORTED_MPDU_LENGTH_LSB 0 #define RX_MSDU_END_INFO0_FIRST_MSDU BIT(14) #define RX_MSDU_END_INFO0_LAST_MSDU BIT(15) +#define RX_MSDU_END_INFO0_MSDU_LIMIT_ERR BIT(18) #define RX_MSDU_END_INFO0_PRE_DELIM_ERR BIT(30) #define RX_MSDU_END_INFO0_RESERVED_3B BIT(31) @@ -676,6 +677,12 @@ struct rx_msdu_end { * Indicates the last MSDU of the A-MSDU. MPDU end status is * only valid when last_msdu is set. * + *msdu_limit_error + * Indicates that the MSDU threshold was exceeded and thus + * all the rest of the MSDUs will not be scattered and + * will not be decapsulated but will be received in RAW format + * as a single MSDU buffer. + * *reserved_3a * Reserved: HW should fill with zero. FW should ignore. * |