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| author | Avinash Patil | 2015-02-13 13:11:08 +0100 |
|---|---|---|
| committer | Kalle Valo | 2015-02-27 09:12:44 +0100 |
| commit | 31def91b3a192bd414d87b3a408de34eed94d616 (patch) | |
| tree | 16c8b41024c1a91138ada14cc577c3627037c61e /drivers/net/wireless/mwifiex/util.c | |
| parent | mwifiex: modify TX buff size for SD8887 (diff) | |
| download | kernel-qcow2-linux-31def91b3a192bd414d87b3a408de34eed94d616.tar.gz kernel-qcow2-linux-31def91b3a192bd414d87b3a408de34eed94d616.tar.xz kernel-qcow2-linux-31def91b3a192bd414d87b3a408de34eed94d616.zip | |
mwifiex: DMA alignment for RX packets
This patch adds support for DMA alignment of sk_buffs
allocated for RX.
Patch also adds support to modify skb allocation flags.
Signed-off-by: Marc Yang <yangyang@marvell.com>
Signed-off-by: Qingshui Gao <gaoqs@marvell.com>
Signed-off-by: Cathy Luo <cluo@marvell.com>
Signed-off-by: Avinash Patil <patila@marvell.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
Diffstat (limited to 'drivers/net/wireless/mwifiex/util.c')
| -rw-r--r-- | drivers/net/wireless/mwifiex/util.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/net/wireless/mwifiex/util.c b/drivers/net/wireless/mwifiex/util.c index 47e215b6d5f5..2148a573396b 100644 --- a/drivers/net/wireless/mwifiex/util.c +++ b/drivers/net/wireless/mwifiex/util.c @@ -631,3 +631,26 @@ void mwifiex_hist_data_reset(struct mwifiex_private *priv) for (ix = 0; ix < MWIFIEX_MAX_SIG_STRENGTH; ix++) atomic_set(&phist_data->sig_str[ix], 0); } + +void *mwifiex_alloc_rx_buf(int rx_len, gfp_t flags) +{ + struct sk_buff *skb; + int buf_len, pad; + + buf_len = rx_len + MWIFIEX_RX_HEADROOM + MWIFIEX_DMA_ALIGN_SZ; + + skb = __dev_alloc_skb(buf_len, flags); + + if (!skb) + return NULL; + + skb_reserve(skb, MWIFIEX_RX_HEADROOM); + + pad = MWIFIEX_ALIGN_ADDR(skb->data, MWIFIEX_DMA_ALIGN_SZ) - + (long)skb->data; + + skb_reserve(skb, pad); + + return skb; +} +EXPORT_SYMBOL_GPL(mwifiex_alloc_rx_buf); |