diff options
| author | Arend van Spriel <arend@broadcom.com> | 2013-03-03 12:45:26 +0100 |
|---|---|---|
| committer | John W. Linville <linville@tuxdriver.com> | 2013-03-06 16:28:39 -0500 |
| commit | bee1b848877b9e4512bdda480f73cda12b593e2f (patch) | |
| tree | 6e28cff58b4120294a7dcf662818fafa4e2cafcc | |
| parent | dc7bdbf1ae939d74485569db285971274f4d8fea (diff) | |
brcmfmac: increase required skbuff headroom for firmware signalling
In preparation of firmware signalling feature additional headroom is
needed to accommodate signalling protocol data between host and
firmware.
Reviewed-by: Hante Meuleman <meuleman@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>
| -rw-r--r-- | drivers/net/wireless/brcm80211/brcmfmac/dhd_cdc.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/drivers/net/wireless/brcm80211/brcmfmac/dhd_cdc.c b/drivers/net/wireless/brcm80211/brcmfmac/dhd_cdc.c index a2354d951dd7..81e1be7051ca 100644 --- a/drivers/net/wireless/brcm80211/brcmfmac/dhd_cdc.c +++ b/drivers/net/wireless/brcm80211/brcmfmac/dhd_cdc.c @@ -71,13 +71,26 @@ struct brcmf_proto_cdc_dcmd { ((hdr)->flags2 = (((hdr)->flags2 & ~BDC_FLAG2_IF_MASK) | \ ((idx) << BDC_FLAG2_IF_SHIFT))) +/** + * struct brcmf_proto_bdc_header - BDC header format + * + * @flags: flags contain protocol and checksum info. + * @priority: 802.1d priority and USB flow control info (bit 4:7). + * @flags2: additional flags containing dongle interface index. + * @data_offset: start of packet data. header is following by firmware signals. + */ struct brcmf_proto_bdc_header { u8 flags; - u8 priority; /* 802.1d Priority, 4:7 flow control info for usb */ + u8 priority; u8 flags2; u8 data_offset; }; +/* + * maximum length of firmware signal data between + * the BDC header and packet data in the tx path. + */ +#define BRCMF_PROT_FW_SIGNAL_MAX_TXBYTES 12 #define RETRIES 2 /* # of retries to retrieve matching dcmd response */ #define BUS_HEADER_LEN (16+64) /* Must be atleast SDPCM_RESERVE @@ -350,7 +363,7 @@ int brcmf_proto_attach(struct brcmf_pub *drvr) } drvr->prot = cdc; - drvr->hdrlen += BDC_HEADER_LEN; + drvr->hdrlen += BDC_HEADER_LEN + BRCMF_PROT_FW_SIGNAL_MAX_TXBYTES; drvr->bus_if->maxctl = BRCMF_DCMD_MAXLEN + sizeof(struct brcmf_proto_cdc_dcmd) + ROUND_UP_MARGIN; return 0; |