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Commit ebb93883 authored by Arend van Spriel's avatar Arend van Spriel Committed by John W. Linville
Browse files

brcmfmac: add definitions for handling sk_buff control buffer data 



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: default avatarPieter-Paul Giesberts <pieterpg@broadcom.com>
Reviewed-by: default avatarHante Meuleman <meuleman@broadcom.com>
Reviewed-by: default avatarPiotr Haber <phaber@broadcom.com>
Signed-off-by: default avatarArend van Spriel <arend@broadcom.com>
Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
parent 29e04ae3

drivers/net/wireless/brcm80211/brcmfmac/fwsignal.c

+107 −33
Original line number Diff line number Diff line
@@ -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;