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brcmfmac: simplify transmit path

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When getting a transmit packet from the networking layer simply
enqueue the packet unconditional and have it handled by the dequeue
worker. The transfer of the packet to the bus-specific driver part
is now done from one context.

Reviewed-by: Hante Meuleman <meuleman@broadcom.com>
Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Arend van Spriel 2013-06-26 14:20:14 +02:00 committed by John W. Linville
parent 88f9b65d44
commit 2086374658
1 changed files with 5 additions and 49 deletions
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54
drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c
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@ -1707,37 +1707,6 @@ static int brcmf_fws_borrow_credit(struct brcmf_fws_info *fws)
return -ENAVAIL; return -ENAVAIL;
} }
static int brcmf_fws_consume_credit(struct brcmf_fws_info *fws, int fifo,
struct sk_buff *skb)
{
struct brcmf_fws_mac_descriptor *entry = brcmf_skbcb(skb)->mac;
int *credit = &fws->fifo_credit[fifo];
if (fifo != BRCMF_FWS_FIFO_AC_BE)
fws->borrow_defer_timestamp = jiffies +
BRCMF_FWS_BORROW_DEFER_PERIOD;
if (!(*credit)) {
/* Try to borrow a credit from other queue */
if (fifo != BRCMF_FWS_FIFO_AC_BE ||
(brcmf_fws_borrow_credit(fws) != 0)) {
brcmf_dbg(DATA, "ac=%d, credits depleted\n", fifo);
return -ENAVAIL;
}
} else {
(*credit)--;
if (!(*credit))
fws->fifo_credit_map &= ~(1 << fifo);
}
brcmf_fws_macdesc_use_req_credit(entry, skb);
brcmf_dbg(DATA, "ac=%d, credits=%02d:%02d:%02d:%02d\n", fifo,
fws->fifo_credit[0], fws->fifo_credit[1],
fws->fifo_credit[2], fws->fifo_credit[3]);
return 0;
}
static int brcmf_fws_commit_skb(struct brcmf_fws_info *fws, int fifo, static int brcmf_fws_commit_skb(struct brcmf_fws_info *fws, int fifo,
struct sk_buff *skb) struct sk_buff *skb)
{ {
@ -1819,25 +1788,12 @@ int brcmf_fws_process_skb(struct brcmf_if *ifp, struct sk_buff *skb)
eh->h_dest, multicast, fifo); eh->h_dest, multicast, fifo);
brcmf_fws_lock(drvr, flags); brcmf_fws_lock(drvr, flags);
/* multicast credit support is conditional, setting brcmf_fws_enq(fws, BRCMF_FWS_SKBSTATE_DELAYED, fifo, skb);
* flag to false to assure credit is consumed below. if (fifo != BRCMF_FWS_FIFO_AC_BE && fifo < BRCMF_FWS_FIFO_BCMC)
*/ fws->borrow_defer_timestamp = jiffies +
if (fws->bcmc_credit_check) BRCMF_FWS_BORROW_DEFER_PERIOD;
multicast = false;
if (skcb->mac->suppressed ||
fws->bus_flow_blocked ||
brcmf_fws_macdesc_closed(fws, skcb->mac, fifo) ||
brcmu_pktq_mlen(&skcb->mac->psq, 3 << (fifo * 2)) ||
(!multicast &&
brcmf_fws_consume_credit(fws, fifo, skb) < 0)) {
/* enqueue the packet in delayQ */
drvr->fws->fifo_delay_map |= 1 << fifo;
brcmf_fws_enq(fws, BRCMF_FWS_SKBSTATE_DELAYED, fifo, skb);
} else {
brcmf_fws_commit_skb(fws, fifo, skb);
}
brcmf_fws_unlock(drvr, flags); brcmf_fws_unlock(drvr, flags);
brcmf_fws_schedule_deq(fws);
return 0; return 0;
} }