diff options
| author | Loic Poulain <loic.poulain@linaro.org> | 2021-10-25 16:26:10 +0300 |
|---|---|---|
| committer | Kalle Valo <kvalo@codeaurora.org> | 2021-10-27 10:42:22 +0300 |
| commit | a224b47ab36d7db5fb5d410622777fd10794f4cd (patch) | |
| tree | 9139bf7d34ec718fb743e2e81d3f2d089453579c /drivers/net/wireless/ath/wcn36xx/main.c | |
| parent | 2371b15f8eeb5fb2c5f323ad4d4ea221277ac21e (diff) | |
| download | linux-a224b47ab36d7db5fb5d410622777fd10794f4cd.tar.xz | |
wcn36xx: Add chained transfer support for AMSDU
WCNSS RX DMA transfer support is limited to 3872 bytes, which is
enough for simple MPDUs (single MSDU), but not enough for cases
with A-MSDU (depending on max AMSDU size or max MPDU size).
In that case the MPDU is spread over multiple transfers, with the
first transfer containing the MPDU header and (at least) the first
A-MSDU subframe and additional transfer(s) containing the following
A-MSDUs. This can be handled with a series of flags to tagging the
first and last A-MSDU transfers.
In that case we have to bufferize and re-linearize the A-MSDU buffers
into a proper MPDU skb before forwarding to mac80211 (in the same way
as it is done in ath10k).
This change also includes sanity check of the buffer descriptor to
prevent skb overflow.
Signed-off-by: Loic Poulain <loic.poulain@linaro.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Link: https://lore.kernel.org/r/1634557705-11120-1-git-send-email-loic.poulain@linaro.org
Diffstat (limited to 'drivers/net/wireless/ath/wcn36xx/main.c')
| -rw-r--r-- | drivers/net/wireless/ath/wcn36xx/main.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/wcn36xx/main.c b/drivers/net/wireless/ath/wcn36xx/main.c index 2ac8efa6fb12..80d818c5a64e 100644 --- a/drivers/net/wireless/ath/wcn36xx/main.c +++ b/drivers/net/wireless/ath/wcn36xx/main.c @@ -1499,6 +1499,7 @@ static int wcn36xx_probe(struct platform_device *pdev) mutex_init(&wcn->conf_mutex); mutex_init(&wcn->hal_mutex); mutex_init(&wcn->scan_lock); + __skb_queue_head_init(&wcn->amsdu); wcn->hal_buf = devm_kmalloc(wcn->dev, WCN36XX_HAL_BUF_SIZE, GFP_KERNEL); if (!wcn->hal_buf) { @@ -1576,6 +1577,8 @@ static int wcn36xx_remove(struct platform_device *pdev) iounmap(wcn->dxe_base); iounmap(wcn->ccu_base); + __skb_queue_purge(&wcn->amsdu); + mutex_destroy(&wcn->hal_mutex); ieee80211_free_hw(hw); |