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wil6210: fall back to pseudo-DMS mcast for secure link and PBSS 

Multicast is not yet properly supported for all connection types;
actually, only non-secure AP is supported. For all other cases,
fall back to old "pseudo-DMS" approach. Namely, for:
- PBSS
- secure connection

When re-routing MCAST Rx->Tx on the AP, do not Tx back to the origin
of the frame

Signed-off-by: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Vladimir Kondratiev 2015-03-15 16:00:24 +02:00 committed by Kalle Valo
parent 41d6b093b7
commit 70812421fb
1 changed files with 101 additions and 2 deletions
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103
drivers/net/wireless/ath/wil6210/txrx.c
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@ -908,8 +908,20 @@ static struct vring *wil_find_tx_vring_sta(struct wil6210_priv *wil,
return NULL;
}
static struct vring *wil_find_tx_bcast(struct wil6210_priv *wil,
struct sk_buff *skb)
/* Use one of 2 strategies:
*
* 1. New (real broadcast):
* use dedicated broadcast vring
* 2. Old (pseudo-DMS):
* Find 1-st vring and return it;
* duplicate skb and send it to other active vrings;
* in all cases override dest address to unicast peer's address
* Use old strategy when new is not supported yet:
* - for PBSS
* - for secure link
*/
static struct vring *wil_find_tx_bcast_1(struct wil6210_priv *wil,
struct sk_buff *skb)
{
struct vring *v;
int i = wil->bcast_vring;
@ -923,6 +935,93 @@ static struct vring *wil_find_tx_bcast(struct wil6210_priv *wil,
return v;
}
static void wil_set_da_for_vring(struct wil6210_priv *wil,
struct sk_buff *skb, int vring_index)
{
struct ethhdr *eth = (void *)skb->data;
int cid = wil->vring2cid_tid[vring_index][0];
ether_addr_copy(eth->h_dest, wil->sta[cid].addr);
}
static struct vring *wil_find_tx_bcast_2(struct wil6210_priv *wil,
struct sk_buff *skb)
{
struct vring *v, *v2;
struct sk_buff *skb2;
int i;
u8 cid;
struct ethhdr *eth = (void *)skb->data;
char *src = eth->h_source;
/* find 1-st vring eligible for data */
for (i = 0; i < WIL6210_MAX_TX_RINGS; i++) {
v = &wil->vring_tx[i];
if (!v->va)
continue;
cid = wil->vring2cid_tid[i][0];
if (cid >= WIL6210_MAX_CID) /* skip BCAST */
continue;
if (!wil->sta[cid].data_port_open)
continue;
/* don't Tx back to source when re-routing Rx->Tx at the AP */
if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN))
continue;
goto found;
}
wil_dbg_txrx(wil, "Tx while no vrings active?\n");
return NULL;
found:
wil_dbg_txrx(wil, "BCAST -> ring %d\n", i);
wil_set_da_for_vring(wil, skb, i);
/* find other active vrings and duplicate skb for each */
for (i++; i < WIL6210_MAX_TX_RINGS; i++) {
v2 = &wil->vring_tx[i];
if (!v2->va)
continue;
cid = wil->vring2cid_tid[i][0];
if (cid >= WIL6210_MAX_CID) /* skip BCAST */
continue;
if (!wil->sta[cid].data_port_open)
continue;
if (0 == memcmp(wil->sta[cid].addr, src, ETH_ALEN))
continue;
skb2 = skb_copy(skb, GFP_ATOMIC);
if (skb2) {
wil_dbg_txrx(wil, "BCAST DUP -> ring %d\n", i);
wil_set_da_for_vring(wil, skb2, i);
wil_tx_vring(wil, v2, skb2);
} else {
wil_err(wil, "skb_copy failed\n");
}
}
return v;
}
static struct vring *wil_find_tx_bcast(struct wil6210_priv *wil,
struct sk_buff *skb)
{
struct wireless_dev *wdev = wil->wdev;
if (wdev->iftype != NL80211_IFTYPE_AP)
return wil_find_tx_bcast_2(wil, skb);
if (wil->privacy)
return wil_find_tx_bcast_2(wil, skb);
return wil_find_tx_bcast_1(wil, skb);
}
static int wil_tx_desc_map(struct vring_tx_desc *d, dma_addr_t pa, u32 len,
int vring_index)
{