diff options
| author | Franky Lin <frankyl@broadcom.com> | 2013-09-25 11:05:43 (GMT) |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2013-10-03 20:24:25 (GMT) |
| commit | 5491c11c67f2c83c95fa9a26172bc1994580aed7 (patch) | |
| tree | e314ad23e961ca7e2e4cb495c161af2ada5b51be /drivers | |
| parent | 7434785652457482a4b22c280a83776c3873940d (diff) | |
| download | linux-fsl-qoriq-5491c11c67f2c83c95fa9a26172bc1994580aed7.tar.xz | |
brcmfmac: reserve memory for bus layer in sk_buff::cb
Bus layer need to share sk_buff::cb with firmware signal feature. Reserve
necessary memory so they won't overwrite each other.
Reviewed-by: Arend Van Spriel <arend@broadcom.com>
Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Signed-off-by: Franky Lin <frankyl@broadcom.com>
Signed-off-by: Arend van Spriel <arend@broadcom.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c | 15 | ||||
| -rw-r--r-- | drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c | 2 |
2 files changed, 12 insertions, 5 deletions
diff --git a/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c b/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c index 1aa75d5..f9ba4d0 100644 --- a/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c +++ b/drivers/net/wireless/brcm80211/brcmfmac/dhd_sdio.c @@ -1786,10 +1786,15 @@ brcmf_sdbrcm_wait_event_wakeup(struct brcmf_sdio *bus) return; } +/** + * struct brcmf_skbuff_cb reserves first two bytes in sk_buff::cb for + * bus layer usage. + */ /* flag marking a dummy skb added for DMA alignment requirement */ -#define DUMMY_SKB_FLAG 0x10000 +#define ALIGN_SKB_FLAG 0x8000 /* bit mask of data length chopped from the previous packet */ -#define DUMMY_SKB_CHOP_LEN_MASK 0xffff +#define ALIGN_SKB_CHOP_LEN_MASK 0x7fff + /** * brcmf_sdio_txpkt_prep - packet preparation for transmit * @bus: brcmf_sdio structure pointer @@ -1854,7 +1859,7 @@ brcmf_sdio_txpkt_prep(struct brcmf_sdio *bus, struct sk_buff_head *pktq, memcpy(pkt_new->data, pkt_next->data + pkt_next->len - tail_chop, tail_chop); - *(u32 *)(pkt_new->cb) = DUMMY_SKB_FLAG + tail_chop; + *(u32 *)(pkt_new->cb) = ALIGN_SKB_FLAG + tail_chop; skb_trim(pkt_next, pkt_next->len - tail_chop); __skb_queue_after(pktq, pkt_next, pkt_new); } else { @@ -1908,8 +1913,8 @@ brcmf_sdio_txpkt_postp(struct brcmf_sdio *bus, struct sk_buff_head *pktq) skb_queue_walk_safe(pktq, pkt_next, tmp) { dummy_flags = *(u32 *)(pkt_next->cb); - if (dummy_flags & DUMMY_SKB_FLAG) { - chop_len = dummy_flags & DUMMY_SKB_CHOP_LEN_MASK; + if (dummy_flags & ALIGN_SKB_FLAG) { + chop_len = dummy_flags & ALIGN_SKB_CHOP_LEN_MASK; if (chop_len) { pkt_prev = pkt_next->prev; memcpy(pkt_prev->data + pkt_prev->len, diff --git a/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c b/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c index 82f9140..d0cd0bf 100644 --- a/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c +++ b/drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c @@ -168,6 +168,7 @@ enum brcmf_fws_skb_state { /** * struct brcmf_skbuff_cb - control buffer associated with skbuff. * + * @bus_flags: 2 bytes reserved for bus specific parameters * @if_flags: holds interface index and packet related flags. * @htod: host to device packet identifier (used in PKTTAG tlv). * @state: transmit state of the packet. @@ -177,6 +178,7 @@ enum brcmf_fws_skb_state { * provides 48 bytes of storage so this structure should not exceed that. */ struct brcmf_skbuff_cb { + u16 bus_flags; u16 if_flags; u32 htod; enum brcmf_fws_skb_state state; |