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brcmfmac: add definitions for handling sk_buff control buffer data

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The sk_buff structure contains a control buffer that can be used
by different layers in the networking stack for holding packet
associated information. In brcmfmac it is used to hold firmware
signalling related information.

Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: Hante Meuleman <meuleman@broadcom.com>
Reviewed-by: Piotr Haber <phaber@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 2013-04-03 12:40:35 +02:00 committed by John W. Linville
parent 29e04ae31d
commit ebb93883cf
1 changed files with 107 additions and 33 deletions
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140
drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c
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@ -137,6 +137,113 @@ static const char *brcmf_fws_get_tlv_name(enum brcmf_fws_tlv_type id)
#define BRCMF_FWS_PSQ_PREC_COUNT ((NL80211_NUM_ACS + 1) * 2)
#define BRCMF_FWS_PSQ_LEN 256
/**
* enum brcmf_fws_skb_state - indicates processing state of skb.
*/
enum brcmf_fws_skb_state {
WLFC_PKTTYPE_NEW,
WLFC_PKTTYPE_DELAYED,
WLFC_PKTTYPE_SUPPRESSED,
WLFC_PKTTYPE_MAX
};
/**
* struct brcmf_skbuff_cb - control buffer associated with skbuff.
*
* @if_flags: holds interface index and packet related flags.
* @da: destination MAC address extracted from skbuff once.
* @htod: host to device packet identifier (used in PKTTAG tlv).
* @needs_hdr: the packet does not yet have a BDC header.
* @state: transmit state of the packet.
* @mac: descriptor related to destination for this packet.
*
* This information is stored in control buffer struct sk_buff::cb, which
* provides 48 bytes of storage so this structure should not exceed that.
*/
struct brcmf_skbuff_cb {
u16 if_flags;
u8 da[ETH_ALEN];
u32 htod;
u8 needs_hdr;
enum brcmf_fws_skb_state state;
struct brcmf_fws_mac_descriptor *mac;
};
/**
* macro casting skbuff control buffer to struct brcmf_skbuff_cb.
*/
#define brcmf_skbcb(skb) ((struct brcmf_skbuff_cb *)((skb)->cb))
/**
* sk_buff control if flags
*
* b[11] - packet sent upon firmware request.
* b[10] - packet only contains signalling data.
* b[9] - packet is a tx packet.
* b[8] - packet uses FIFO credit (non-pspoll).
* b[7] - interface in AP mode.
* b[6:4] - AC FIFO number.
* b[3:0] - interface index.
*/
#define BRCMF_SKB_IF_FLAGS_REQUESTED_MASK 0x0800
#define BRCMF_SKB_IF_FLAGS_REQUESTED_SHIFT 11
#define BRCMF_SKB_IF_FLAGS_SIGNAL_ONLY_MASK 0x0400
#define BRCMF_SKB_IF_FLAGS_SIGNAL_ONLY_SHIFT 10
#define BRCMF_SKB_IF_FLAGS_TRANSMIT_MASK 0x0200
#define BRCMF_SKB_IF_FLAGS_TRANSMIT_SHIFT 9
#define BRCMF_SKB_IF_FLAGS_CREDITCHECK_MASK 0x0100
#define BRCMF_SKB_IF_FLAGS_CREDITCHECK_SHIFT 8
#define BRCMF_SKB_IF_FLAGS_IF_AP_MASK 0x0080
#define BRCMF_SKB_IF_FLAGS_IF_AP_SHIFT 7
#define BRCMF_SKB_IF_FLAGS_FIFO_MASK 0x0070
#define BRCMF_SKB_IF_FLAGS_FIFO_SHIFT 4
#define BRCMF_SKB_IF_FLAGS_INDEX_MASK 0x000f
#define BRCMF_SKB_IF_FLAGS_INDEX_SHIFT 0
#define brcmf_skb_if_flags_set_field(skb, field, value) \
brcmu_maskset16(&(brcmf_skbcb(skb)->if_flags), \
BRCMF_SKB_IF_FLAGS_ ## field ## _MASK, \
BRCMF_SKB_IF_FLAGS_ ## field ## _SHIFT, (value))
#define brcmf_skb_if_flags_get_field(skb, field) \
brcmu_maskget16(brcmf_skbcb(skb)->if_flags, \
BRCMF_SKB_IF_FLAGS_ ## field ## _MASK, \
BRCMF_SKB_IF_FLAGS_ ## field ## _SHIFT)
/**
* sk_buff control packet identifier
*
* 32-bit packet identifier used in PKTTAG tlv from host to dongle.
*
* - Generated at the host (e.g. dhd)
* - Seen as a generic sequence number by firmware except for the flags field.
*
* Generation : b[31] => generation number for this packet [host->fw]
* OR, current generation number [fw->host]
* Flags : b[30:27] => command, status flags
* FIFO-AC : b[26:24] => AC-FIFO id
* h-slot : b[23:8] => hanger-slot
* freerun : b[7:0] => A free running counter
*/
#define BRCMF_SKB_HTOD_TAG_GENERATION_MASK 0x80000000
#define BRCMF_SKB_HTOD_TAG_GENERATION_SHIFT 31
#define BRCMF_SKB_HTOD_TAG_FLAGS_MASK 0x78000000
#define BRCMF_SKB_HTOD_TAG_FLAGS_SHIFT 27
#define BRCMF_SKB_HTOD_TAG_FIFO_MASK 0x07000000
#define BRCMF_SKB_HTOD_TAG_FIFO_SHIFT 24
#define BRCMF_SKB_HTOD_TAG_HSLOT_MASK 0x00ffff00
#define BRCMF_SKB_HTOD_TAG_HSLOT_SHIFT 8
#define BRCMF_SKB_HTOD_TAG_FREERUN_MASK 0x000000ff
#define BRCMF_SKB_HTOD_TAG_FREERUN_SHIFT 0
#define brcmf_skb_htod_tag_set_field(skb, field, value) \
brcmu_maskset32(&(brcmf_skbcb(skb)->htod_tag), \
BRCMF_SKB_HTOD_TAG_ ## field ## _MASK, \
BRCMF_SKB_HTOD_TAG_ ## field ## _SHIFT, (value))
#define brcmf_skb_htod_tag_get_field(skb, field) \
brcmu_maskget32(brcmf_skbcb(skb)->htod_tag, \
BRCMF_SKB_HTOD_TAG_ ## field ## _MASK, \
BRCMF_SKB_HTOD_TAG_ ## field ## _SHIFT)
/**
* struct brcmf_fws_mac_descriptor - firmware signalling data per node/interface
*
@ -160,39 +267,6 @@ struct brcmf_fws_mac_descriptor {
struct pktq psq;
};
/**
* FWFC packet identifier
*
* 32-bit packet identifier used in PKTTAG tlv from host to dongle.
*
* - Generated at the host (e.g. dhd)
* - Seen as a generic sequence number by wlc except the flags field
*
* Generation : b[31] => generation number for this packet [host->fw]
* OR, current generation number [fw->host]
* Flags : b[30:27] => command, status flags
* FIFO-AC : b[26:24] => AC-FIFO id
* h-slot : b[23:8] => hanger-slot
* freerun : b[7:0] => A free running counter
*/
#define BRCMF_FWS_PKTTAG_GENERATION_MASK 0x80000000
#define BRCMF_FWS_PKTTAG_GENERATION_SHIFT 31
#define BRCMF_FWS_PKTTAG_FLAGS_MASK 0x78000000
#define BRCMF_FWS_PKTTAG_FLAGS_SHIFT 27
#define BRCMF_FWS_PKTTAG_FIFO_MASK 0x07000000
#define BRCMF_FWS_PKTTAG_FIFO_SHIFT 24
#define BRCMF_FWS_PKTTAG_HSLOT_MASK 0x00ffff00
#define BRCMF_FWS_PKTTAG_HSLOT_SHIFT 8
#define BRCMF_FWS_PKTTAG_FREERUN_MASK 0x000000ff
#define BRCMF_FWS_PKTTAG_FREERUN_SHIFT 0
#define brcmf_fws_pkttag_set_field(var, field, value) \
brcmu_maskset32((var), BRCMF_FWS_PKTTAG_ ## field ## _MASK, \
BRCMF_FWS_PKTTAG_ ## field ## _SHIFT, (value))
#define brcmf_fws_pkttag_get_field(var, field) \
brcmu_maskget32((var), BRCMF_FWS_PKTTAG_ ## field ## _MASK, \
BRCMF_FWS_PKTTAG_ ## field ## _SHIFT)
struct brcmf_fws_info {
struct brcmf_pub *drvr;
struct brcmf_fws_stats stats;