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authorArend van Spriel <arend@broadcom.com>2013-03-03 12:45:26 +0100
committerJohn W. Linville <linville@tuxdriver.com>2013-03-06 16:28:39 -0500
commitbee1b848877b9e4512bdda480f73cda12b593e2f (patch)
tree6e28cff58b4120294a7dcf662818fafa4e2cafcc /drivers/net
parentdc7bdbf1ae939d74485569db285971274f4d8fea (diff)
downloadlinux-bee1b848877b9e4512bdda480f73cda12b593e2f.tar.gz
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>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/wireless/brcm80211/brcmfmac/dhd_cdc.c17
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;