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rtl8xxxu: Handle 40 byte TX descriptors for rtl8723bu

Browse source 
Note the descriptor checksum is still only calculated over the initial
32 bytes of the descriptor, ignoring the last 8 bytes of the
descriptor.

Signed-off-by: Jes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Jes Sorensen 2016-02-29 17:05:27 -05:00 committed by Kalle Valo
parent 80491a1f3c
commit 179e174256
2 changed files with 25 additions and 13 deletions
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35
drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.c
View file

@ -6787,7 +6787,12 @@ static u32 rtl8xxxu_queue_select(struct ieee80211_hw *hw, struct sk_buff *skb)
return queue;
}
static void rtl8xxxu_calc_tx_desc_csum(struct rtl8xxxu_tx_desc *tx_desc)
/*
* Despite newer chips 8723b/8812/8821 having a larger TX descriptor
* format. The descriptor checksum is still only calculated over the
* initial 32 bytes of the descriptor!
*/
static void rtl8xxxu_calc_tx_desc_csum(struct rtl8723au_tx_desc *tx_desc)
{
__le16 *ptr = (__le16 *)tx_desc;
u16 csum = 0;
@ -6799,7 +6804,7 @@ static void rtl8xxxu_calc_tx_desc_csum(struct rtl8xxxu_tx_desc *tx_desc)
*/
tx_desc->csum = cpu_to_le16(0);
for (i = 0; i < (sizeof(struct rtl8xxxu_tx_desc) / sizeof(u16)); i++)
for (i = 0; i < (sizeof(struct rtl8723au_tx_desc) / sizeof(u16)); i++)
csum = csum ^ le16_to_cpu(ptr[i]);
tx_desc->csum |= cpu_to_le16(csum);
@ -6868,13 +6873,15 @@ static void rtl8xxxu_tx_complete(struct urb *urb)
struct sk_buff *skb = (struct sk_buff *)urb->context;
struct ieee80211_tx_info *tx_info;
struct ieee80211_hw *hw;
struct rtl8xxxu_priv *priv;
struct rtl8xxxu_tx_urb *tx_urb =
container_of(urb, struct rtl8xxxu_tx_urb, urb);
tx_info = IEEE80211_SKB_CB(skb);
hw = tx_info->rate_driver_data[0];
priv = hw->priv;
skb_pull(skb, sizeof(struct rtl8xxxu_tx_desc));
skb_pull(skb, priv->fops->tx_desc_size);
ieee80211_tx_info_clear_status(tx_info);
tx_info->status.rates[0].idx = -1;
@ -6885,7 +6892,7 @@ static void rtl8xxxu_tx_complete(struct urb *urb)
ieee80211_tx_status_irqsafe(hw, skb);
rtl8xxxu_free_tx_urb(hw->priv, tx_urb);
rtl8xxxu_free_tx_urb(priv, tx_urb);
}
static void rtl8xxxu_dump_action(struct device *dev,
@ -6935,7 +6942,7 @@ static void rtl8xxxu_tx(struct ieee80211_hw *hw,
struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(skb);
struct ieee80211_rate *tx_rate = ieee80211_get_tx_rate(hw, tx_info);
struct rtl8xxxu_priv *priv = hw->priv;
struct rtl8xxxu_tx_desc *tx_desc;
struct rtl8723au_tx_desc *tx_desc;
struct rtl8xxxu_tx_urb *tx_urb;
struct ieee80211_sta *sta = NULL;
struct ieee80211_vif *vif = tx_info->control.vif;
@ -6944,16 +6951,17 @@ static void rtl8xxxu_tx(struct ieee80211_hw *hw,
u16 pktlen = skb->len;
u16 seq_number;
u16 rate_flag = tx_info->control.rates[0].flags;
int tx_desc_size = priv->fops->tx_desc_size;
int ret;
if (skb_headroom(skb) < sizeof(struct rtl8xxxu_tx_desc)) {
if (skb_headroom(skb) < tx_desc_size) {
dev_warn(dev,
"%s: Not enough headroom (%i) for tx descriptor\n",
__func__, skb_headroom(skb));
goto error;
}
if (unlikely(skb->len > (65535 - sizeof(struct rtl8xxxu_tx_desc)))) {
if (unlikely(skb->len > (65535 - tx_desc_size))) {
dev_warn(dev, "%s: Trying to send over-sized skb (%i)\n",
__func__, skb->len);
goto error;
@ -6977,12 +6985,11 @@ static void rtl8xxxu_tx(struct ieee80211_hw *hw,
if (control && control->sta)
sta = control->sta;
tx_desc = (struct rtl8xxxu_tx_desc *)
skb_push(skb, sizeof(struct rtl8xxxu_tx_desc));
tx_desc = (struct rtl8723au_tx_desc *)skb_push(skb, tx_desc_size);
memset(tx_desc, 0, sizeof(struct rtl8xxxu_tx_desc));
memset(tx_desc, 0, tx_desc_size);
tx_desc->pkt_size = cpu_to_le16(pktlen);
tx_desc->pkt_offset = sizeof(struct rtl8xxxu_tx_desc);
tx_desc->pkt_offset = tx_desc_size;
tx_desc->txdw0 =
TXDESC_OWN | TXDESC_FIRST_SEGMENT | TXDESC_LAST_SEGMENT;
@ -8077,7 +8084,7 @@ static int rtl8xxxu_probe(struct usb_interface *interface,
SET_IEEE80211_DEV(priv->hw, &interface->dev);
SET_IEEE80211_PERM_ADDR(hw, priv->mac_addr);
hw->extra_tx_headroom = sizeof(struct rtl8xxxu_tx_desc);
hw->extra_tx_headroom = priv->fops->tx_desc_size;
ieee80211_hw_set(hw, SIGNAL_DBM);
/*
* The firmware handles rate control
@ -8134,6 +8141,7 @@ static struct rtl8xxxu_fileops rtl8723au_fops = {
.writeN_block_size = 1024,
.mbox_ext_reg = REG_HMBOX_EXT_0,
.mbox_ext_width = 2,
.tx_desc_size = sizeof(struct rtl8723au_tx_desc),
.adda_1t_init = 0x0b1b25a0,
.adda_1t_path_on = 0x0bdb25a0,
.adda_2t_path_on_a = 0x04db25a4,
@ -8157,6 +8165,7 @@ static struct rtl8xxxu_fileops rtl8723bu_fops = {
.writeN_block_size = 1024,
.mbox_ext_reg = REG_HMBOX_EXT0_8723B,
.mbox_ext_width = 4,
.tx_desc_size = sizeof(struct rtl8723bu_tx_desc),
.has_s0s1 = 1,
.adda_1t_init = 0x01c00014,
.adda_1t_path_on = 0x01c00014,
@ -8179,6 +8188,7 @@ static struct rtl8xxxu_fileops rtl8192cu_fops = {
.writeN_block_size = 128,
.mbox_ext_reg = REG_HMBOX_EXT_0,
.mbox_ext_width = 2,
.tx_desc_size = sizeof(struct rtl8723au_tx_desc),
.adda_1t_init = 0x0b1b25a0,
.adda_1t_path_on = 0x0bdb25a0,
.adda_2t_path_on_a = 0x04db25a4,
@ -8200,6 +8210,7 @@ static struct rtl8xxxu_fileops rtl8192eu_fops = {
.writeN_block_size = 128,
.mbox_ext_reg = REG_HMBOX_EXT0_8723B,
.mbox_ext_width = 4,
.tx_desc_size = sizeof(struct rtl8723au_tx_desc),
.has_s0s1 = 1,
.adda_1t_init = 0x0fc01616,
.adda_1t_path_on = 0x0fc01616,

3
drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu.h
View file

@ -332,7 +332,7 @@ struct rtl8723bu_rx_desc {
__le32 tsfl;
};
struct rtl8xxxu_tx_desc {
struct rtl8723au_tx_desc {
__le16 pkt_size;
u8 pkt_offset;
u8 txdw0;
@ -1190,6 +1190,7 @@ struct rtl8xxxu_fileops {
int writeN_block_size;
u16 mbox_ext_reg;
char mbox_ext_width;
char tx_desc_size;
char has_s0s1;
u32 adda_1t_init;
u32 adda_1t_path_on;