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mwifiex: make tx packet 64 byte DMA aligned

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This patch adds support for DMA alignment of 64 bytes for TX packets.

Signed-off-by: Xinming Hu <huxm@marvell.com>
Signed-off-by: Avinash Patil <patila@marvell.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Xinming Hu 2014-12-26 03:02:33 -08:00 committed by Kalle Valo
parent 2ab87d5d67
commit 84b313b35f
4 changed files with 43 additions and 28 deletions
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15
drivers/net/wireless/mwifiex/11n_aggr.c
View File

@ -101,6 +101,13 @@ mwifiex_11n_form_amsdu_txpd(struct mwifiex_private *priv,
{
struct txpd *local_tx_pd;
struct mwifiex_txinfo *tx_info = MWIFIEX_SKB_TXCB(skb);
unsigned int pad;
int headroom = (priv->adapter->iface_type ==
MWIFIEX_USB) ? 0 : INTF_HEADER_LEN;
pad = ((void *)skb->data - sizeof(*local_tx_pd) -
headroom - NULL) & (MWIFIEX_DMA_ALIGN_SZ - 1);
skb_push(skb, pad);
skb_push(skb, sizeof(*local_tx_pd));
@ -114,10 +121,12 @@ mwifiex_11n_form_amsdu_txpd(struct mwifiex_private *priv,
local_tx_pd->bss_num = priv->bss_num;
local_tx_pd->bss_type = priv->bss_type;
/* Always zero as the data is followed by struct txpd */
local_tx_pd->tx_pkt_offset = cpu_to_le16(sizeof(struct txpd));
local_tx_pd->tx_pkt_offset = cpu_to_le16(sizeof(struct txpd) +
pad);
local_tx_pd->tx_pkt_type = cpu_to_le16(PKT_TYPE_AMSDU);
local_tx_pd->tx_pkt_length = cpu_to_le16(skb->len -
sizeof(*local_tx_pd));
sizeof(*local_tx_pd) -
pad);
if (tx_info->flags & MWIFIEX_BUF_FLAG_TDLS_PKT)
local_tx_pd->flags |= MWIFIEX_TXPD_FLAGS_TDLS_PACKET;
@ -182,7 +191,7 @@ mwifiex_11n_aggregate_pkt(struct mwifiex_private *priv,
ra_list_flags);
return -1;
}
skb_reserve(skb_aggr, headroom + sizeof(struct txpd));
skb_reserve(skb_aggr, MWIFIEX_MIN_DATA_HEADER_LEN);
tx_info_aggr = MWIFIEX_SKB_TXCB(skb_aggr);
memset(tx_info_aggr, 0, sizeof(*tx_info_aggr));

9
drivers/net/wireless/mwifiex/decl.h
View File

@ -32,9 +32,12 @@
#define MWIFIEX_MAX_BSS_NUM (3)
#define MWIFIEX_MIN_DATA_HEADER_LEN 36 /* sizeof(mwifiex_txpd)
* + 4 byte alignment
*/
#define MWIFIEX_DMA_ALIGN_SZ 64
#define MAX_TXPD_SZ 32
#define INTF_HDR_ALIGN 4
#define MWIFIEX_MIN_DATA_HEADER_LEN (MWIFIEX_DMA_ALIGN_SZ + INTF_HDR_ALIGN + \
MAX_TXPD_SZ)
#define MWIFIEX_MGMT_FRAME_HEADER_SIZE 8 /* sizeof(pkt_type)
* + sizeof(tx_control)
*/

19
drivers/net/wireless/mwifiex/sta_tx.c
View File

@ -47,8 +47,10 @@ void *mwifiex_process_sta_txpd(struct mwifiex_private *priv,
struct mwifiex_adapter *adapter = priv->adapter;
struct txpd *local_tx_pd;
struct mwifiex_txinfo *tx_info = MWIFIEX_SKB_TXCB(skb);
u8 pad;
unsigned int pad;
u16 pkt_type, pkt_offset;
int hroom = (priv->adapter->iface_type == MWIFIEX_USB) ? 0 :
INTF_HEADER_LEN;
if (!skb->len) {
dev_err(adapter->dev, "Tx: bad packet length: %d\n", skb->len);
@ -56,13 +58,12 @@ void *mwifiex_process_sta_txpd(struct mwifiex_private *priv,
return skb->data;
}
BUG_ON(skb_headroom(skb) < MWIFIEX_MIN_DATA_HEADER_LEN);
pkt_type = mwifiex_is_skb_mgmt_frame(skb) ? PKT_TYPE_MGMT : 0;
/* If skb->data is not aligned; add padding */
pad = (4 - (((void *)skb->data - NULL) & 0x3)) % 4;
BUG_ON(skb_headroom(skb) < (sizeof(*local_tx_pd) + INTF_HEADER_LEN
+ pad));
pad = ((void *)skb->data - (sizeof(*local_tx_pd) + hroom)-
NULL) & (MWIFIEX_DMA_ALIGN_SZ - 1);
skb_push(skb, sizeof(*local_tx_pd) + pad);
local_tx_pd = (struct txpd *) skb->data;
@ -70,8 +71,8 @@ void *mwifiex_process_sta_txpd(struct mwifiex_private *priv,
local_tx_pd->bss_num = priv->bss_num;
local_tx_pd->bss_type = priv->bss_type;
local_tx_pd->tx_pkt_length = cpu_to_le16((u16)(skb->len -
(sizeof(struct txpd)
+ pad)));
(sizeof(struct txpd) +
pad)));
local_tx_pd->priority = (u8) skb->priority;
local_tx_pd->pkt_delay_2ms =
@ -115,7 +116,7 @@ void *mwifiex_process_sta_txpd(struct mwifiex_private *priv,
local_tx_pd->tx_pkt_offset = cpu_to_le16(pkt_offset);
/* make space for INTF_HEADER_LEN */
skb_push(skb, INTF_HEADER_LEN);
skb_push(skb, hroom);
if (!local_tx_pd->tx_control)
/* TxCtrl set by user or default */

28
drivers/net/wireless/mwifiex/uap_txrx.c
View File

@ -348,8 +348,10 @@ void *mwifiex_process_uap_txpd(struct mwifiex_private *priv,
struct mwifiex_adapter *adapter = priv->adapter;
struct uap_txpd *txpd;
struct mwifiex_txinfo *tx_info = MWIFIEX_SKB_TXCB(skb);
int pad, len;
u16 pkt_type;
int pad;
u16 pkt_type, pkt_offset;
int hroom = (priv->adapter->iface_type == MWIFIEX_USB) ? 0 :
INTF_HEADER_LEN;
if (!skb->len) {
dev_err(adapter->dev, "Tx: bad packet length: %d\n", skb->len);
@ -357,22 +359,21 @@ void *mwifiex_process_uap_txpd(struct mwifiex_private *priv,
return skb->data;
}
BUG_ON(skb_headroom(skb) < MWIFIEX_MIN_DATA_HEADER_LEN);
pkt_type = mwifiex_is_skb_mgmt_frame(skb) ? PKT_TYPE_MGMT : 0;
/* If skb->data is not aligned, add padding */
pad = (4 - (((void *)skb->data - NULL) & 0x3)) % 4;
pad = ((void *)skb->data - (sizeof(*txpd) + hroom) - NULL) &
(MWIFIEX_DMA_ALIGN_SZ - 1);
len = sizeof(*txpd) + pad;
BUG_ON(skb_headroom(skb) < len + INTF_HEADER_LEN);
skb_push(skb, len);
skb_push(skb, sizeof(*txpd) + pad);
txpd = (struct uap_txpd *)skb->data;
memset(txpd, 0, sizeof(*txpd));
txpd->bss_num = priv->bss_num;
txpd->bss_type = priv->bss_type;
txpd->tx_pkt_length = cpu_to_le16((u16)(skb->len - len));
txpd->tx_pkt_length = cpu_to_le16((u16)(skb->len - (sizeof(*txpd) +
pad)));
txpd->priority = (u8)skb->priority;
txpd->pkt_delay_2ms = mwifiex_wmm_compute_drv_pkt_delay(priv, skb);
@ -392,16 +393,17 @@ void *mwifiex_process_uap_txpd(struct mwifiex_private *priv,
cpu_to_le32(priv->wmm.user_pri_pkt_tx_ctrl[txpd->priority]);
/* Offset of actual data */
pkt_offset = sizeof(*txpd) + pad;
if (pkt_type == PKT_TYPE_MGMT) {
/* Set the packet type and add header for management frame */
txpd->tx_pkt_type = cpu_to_le16(pkt_type);
len += MWIFIEX_MGMT_FRAME_HEADER_SIZE;
pkt_offset += MWIFIEX_MGMT_FRAME_HEADER_SIZE;
}
txpd->tx_pkt_offset = cpu_to_le16(len);
txpd->tx_pkt_offset = cpu_to_le16(pkt_offset);
/* make space for INTF_HEADER_LEN */
skb_push(skb, INTF_HEADER_LEN);
skb_push(skb, hroom);
if (!txpd->tx_control)
/* TxCtrl set by user or default */