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linux/drivers/net/wireless/b43/xmit.h
Michael Buesch f54a52021d b43: Rewrite TX bounce buffer handling 
Do not mess with the original skb, but allocate an independent bouncebuffer.
This protects against bad interference with mac80211's assumptions about
the skb (which already caused bugs).

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2009-11-11 15:23:40 -05:00

355 lines
13 KiB
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#ifndef B43_XMIT_H_
#define B43_XMIT_H_
#include "main.h"
#include <net/mac80211.h>
#define _b43_declare_plcp_hdr(size) \
struct b43_plcp_hdr##size { \
union { \
__le32 data; \
__u8 raw[size]; \
} __attribute__((__packed__)); \
} __attribute__((__packed__))
/* struct b43_plcp_hdr4 */
_b43_declare_plcp_hdr(4);
/* struct b43_plcp_hdr6 */
_b43_declare_plcp_hdr(6);
#undef _b43_declare_plcp_hdr
/* TX header for v4 firmware */
struct b43_txhdr {
__le32 mac_ctl; /* MAC TX control */
__le16 mac_frame_ctl; /* Copy of the FrameControl field */
__le16 tx_fes_time_norm; /* TX FES Time Normal */
__le16 phy_ctl; /* PHY TX control */
__le16 phy_ctl1; /* PHY TX control word 1 */
__le16 phy_ctl1_fb; /* PHY TX control word 1 for fallback rates */
__le16 phy_ctl1_rts; /* PHY TX control word 1 RTS */
__le16 phy_ctl1_rts_fb; /* PHY TX control word 1 RTS for fallback rates */
__u8 phy_rate; /* PHY rate */
__u8 phy_rate_rts; /* PHY rate for RTS/CTS */
__u8 extra_ft; /* Extra Frame Types */
__u8 chan_radio_code; /* Channel Radio Code */
__u8 iv[16]; /* Encryption IV */
__u8 tx_receiver[6]; /* TX Frame Receiver address */
__le16 tx_fes_time_fb; /* TX FES Time Fallback */
struct b43_plcp_hdr6 rts_plcp_fb; /* RTS fallback PLCP header */
__le16 rts_dur_fb; /* RTS fallback duration */
struct b43_plcp_hdr6 plcp_fb; /* Fallback PLCP header */
__le16 dur_fb; /* Fallback duration */
__le16 mimo_modelen; /* MIMO mode length */
__le16 mimo_ratelen_fb; /* MIMO fallback rate length */
__le32 timeout; /* Timeout */
union {
/* The new r410 format. */
struct {
__le16 mimo_antenna; /* MIMO antenna select */
__le16 preload_size; /* Preload size */
PAD_BYTES(2);
__le16 cookie; /* TX frame cookie */
__le16 tx_status; /* TX status */
struct b43_plcp_hdr6 rts_plcp; /* RTS PLCP header */
__u8 rts_frame[16]; /* The RTS frame (if used) */
PAD_BYTES(2);
struct b43_plcp_hdr6 plcp; /* Main PLCP header */
} new_format __attribute__ ((__packed__));
/* The old r351 format. */
struct {
PAD_BYTES(2);
__le16 cookie; /* TX frame cookie */
__le16 tx_status; /* TX status */
struct b43_plcp_hdr6 rts_plcp; /* RTS PLCP header */
__u8 rts_frame[16]; /* The RTS frame (if used) */
PAD_BYTES(2);
struct b43_plcp_hdr6 plcp; /* Main PLCP header */
} old_format __attribute__ ((__packed__));
} __attribute__ ((__packed__));
} __attribute__ ((__packed__));
/* MAC TX control */
#define B43_TXH_MAC_USEFBR 0x10000000 /* Use fallback rate for this AMPDU */
#define B43_TXH_MAC_KEYIDX 0x0FF00000 /* Security key index */
#define B43_TXH_MAC_KEYIDX_SHIFT 20
#define B43_TXH_MAC_KEYALG 0x00070000 /* Security key algorithm */
#define B43_TXH_MAC_KEYALG_SHIFT 16
#define B43_TXH_MAC_AMIC 0x00008000 /* AMIC */
#define B43_TXH_MAC_RIFS 0x00004000 /* Use RIFS */
#define B43_TXH_MAC_LIFETIME 0x00002000 /* Lifetime */
#define B43_TXH_MAC_FRAMEBURST 0x00001000 /* Frameburst */
#define B43_TXH_MAC_SENDCTS 0x00000800 /* Send CTS-to-self */
#define B43_TXH_MAC_AMPDU 0x00000600 /* AMPDU status */
#define B43_TXH_MAC_AMPDU_MPDU 0x00000000 /* Regular MPDU, not an AMPDU */
#define B43_TXH_MAC_AMPDU_FIRST 0x00000200 /* First MPDU or AMPDU */
#define B43_TXH_MAC_AMPDU_INTER 0x00000400 /* Intermediate MPDU or AMPDU */
#define B43_TXH_MAC_AMPDU_LAST 0x00000600 /* Last (or only) MPDU of AMPDU */
#define B43_TXH_MAC_40MHZ 0x00000100 /* Use 40 MHz bandwidth */
#define B43_TXH_MAC_5GHZ 0x00000080 /* 5GHz band */
#define B43_TXH_MAC_DFCS 0x00000040 /* DFCS */
#define B43_TXH_MAC_IGNPMQ 0x00000020 /* Ignore PMQ */
#define B43_TXH_MAC_HWSEQ 0x00000010 /* Use Hardware Sequence Number */
#define B43_TXH_MAC_STMSDU 0x00000008 /* Start MSDU */
#define B43_TXH_MAC_SENDRTS 0x00000004 /* Send RTS */
#define B43_TXH_MAC_LONGFRAME 0x00000002 /* Long frame */
#define B43_TXH_MAC_ACK 0x00000001 /* Immediate ACK */
/* Extra Frame Types */
#define B43_TXH_EFT_FB 0x03 /* Data frame fallback encoding */
#define B43_TXH_EFT_FB_CCK 0x00 /* CCK */
#define B43_TXH_EFT_FB_OFDM 0x01 /* OFDM */
#define B43_TXH_EFT_FB_EWC 0x02 /* EWC */
#define B43_TXH_EFT_FB_N 0x03 /* N */
#define B43_TXH_EFT_RTS 0x0C /* RTS/CTS encoding */
#define B43_TXH_EFT_RTS_CCK 0x00 /* CCK */
#define B43_TXH_EFT_RTS_OFDM 0x04 /* OFDM */
#define B43_TXH_EFT_RTS_EWC 0x08 /* EWC */
#define B43_TXH_EFT_RTS_N 0x0C /* N */
#define B43_TXH_EFT_RTSFB 0x30 /* RTS/CTS fallback encoding */
#define B43_TXH_EFT_RTSFB_CCK 0x00 /* CCK */
#define B43_TXH_EFT_RTSFB_OFDM 0x10 /* OFDM */
#define B43_TXH_EFT_RTSFB_EWC 0x20 /* EWC */
#define B43_TXH_EFT_RTSFB_N 0x30 /* N */
/* PHY TX control word */
#define B43_TXH_PHY_ENC 0x0003 /* Data frame encoding */
#define B43_TXH_PHY_ENC_CCK 0x0000 /* CCK */
#define B43_TXH_PHY_ENC_OFDM 0x0001 /* OFDM */
#define B43_TXH_PHY_ENC_EWC 0x0002 /* EWC */
#define B43_TXH_PHY_ENC_N 0x0003 /* N */
#define B43_TXH_PHY_SHORTPRMBL 0x0010 /* Use short preamble */
#define B43_TXH_PHY_ANT 0x03C0 /* Antenna selection */
#define B43_TXH_PHY_ANT0 0x0000 /* Use antenna 0 */
#define B43_TXH_PHY_ANT1 0x0040 /* Use antenna 1 */
#define B43_TXH_PHY_ANT01AUTO 0x00C0 /* Use antenna 0/1 auto */
#define B43_TXH_PHY_ANT2 0x0100 /* Use antenna 2 */
#define B43_TXH_PHY_ANT3 0x0200 /* Use antenna 3 */
#define B43_TXH_PHY_TXPWR 0xFC00 /* TX power */
#define B43_TXH_PHY_TXPWR_SHIFT 10
/* PHY TX control word 1 */
#define B43_TXH_PHY1_BW 0x0007 /* Bandwidth */
#define B43_TXH_PHY1_BW_10 0x0000 /* 10 MHz */
#define B43_TXH_PHY1_BW_10U 0x0001 /* 10 MHz upper */
#define B43_TXH_PHY1_BW_20 0x0002 /* 20 MHz */
#define B43_TXH_PHY1_BW_20U 0x0003 /* 20 MHz upper */
#define B43_TXH_PHY1_BW_40 0x0004 /* 40 MHz */
#define B43_TXH_PHY1_BW_40DUP 0x0005 /* 50 MHz duplicate */
#define B43_TXH_PHY1_MODE 0x0038 /* Mode */
#define B43_TXH_PHY1_MODE_SISO 0x0000 /* SISO */
#define B43_TXH_PHY1_MODE_CDD 0x0008 /* CDD */
#define B43_TXH_PHY1_MODE_STBC 0x0010 /* STBC */
#define B43_TXH_PHY1_MODE_SDM 0x0018 /* SDM */
#define B43_TXH_PHY1_CRATE 0x0700 /* Coding rate */
#define B43_TXH_PHY1_CRATE_1_2 0x0000 /* 1/2 */
#define B43_TXH_PHY1_CRATE_2_3 0x0100 /* 2/3 */
#define B43_TXH_PHY1_CRATE_3_4 0x0200 /* 3/4 */
#define B43_TXH_PHY1_CRATE_4_5 0x0300 /* 4/5 */
#define B43_TXH_PHY1_CRATE_5_6 0x0400 /* 5/6 */
#define B43_TXH_PHY1_CRATE_7_8 0x0600 /* 7/8 */
#define B43_TXH_PHY1_MODUL 0x3800 /* Modulation scheme */
#define B43_TXH_PHY1_MODUL_BPSK 0x0000 /* BPSK */
#define B43_TXH_PHY1_MODUL_QPSK 0x0800 /* QPSK */
#define B43_TXH_PHY1_MODUL_QAM16 0x1000 /* QAM16 */
#define B43_TXH_PHY1_MODUL_QAM64 0x1800 /* QAM64 */
#define B43_TXH_PHY1_MODUL_QAM256 0x2000 /* QAM256 */
/* r351 firmware compatibility stuff. */
static inline
bool b43_is_old_txhdr_format(struct b43_wldev *dev)
{
return (dev->fw.rev <= 351);
}
static inline
size_t b43_txhdr_size(struct b43_wldev *dev)
{
if (b43_is_old_txhdr_format(dev))
return 100 + sizeof(struct b43_plcp_hdr6);
return 104 + sizeof(struct b43_plcp_hdr6);
}
int b43_generate_txhdr(struct b43_wldev *dev,
u8 * txhdr,
struct sk_buff *skb_frag,
struct ieee80211_tx_info *txctl, u16 cookie);
/* Transmit Status */
struct b43_txstatus {
u16 cookie; /* The cookie from the txhdr */
u16 seq; /* Sequence number */
u8 phy_stat; /* PHY TX status */
u8 frame_count; /* Frame transmit count */
u8 rts_count; /* RTS transmit count */
u8 supp_reason; /* Suppression reason */
/* flags */
u8 pm_indicated; /* PM mode indicated to AP */
u8 intermediate; /* Intermediate status notification (not final) */
u8 for_ampdu; /* Status is for an AMPDU (afterburner) */
u8 acked; /* Wireless ACK received */
};
/* txstatus supp_reason values */
enum {
B43_TXST_SUPP_NONE, /* Not suppressed */
B43_TXST_SUPP_PMQ, /* Suppressed due to PMQ entry */
B43_TXST_SUPP_FLUSH, /* Suppressed due to flush request */
B43_TXST_SUPP_PREV, /* Previous fragment failed */
B43_TXST_SUPP_CHAN, /* Channel mismatch */
B43_TXST_SUPP_LIFE, /* Lifetime expired */
B43_TXST_SUPP_UNDER, /* Buffer underflow */
B43_TXST_SUPP_ABNACK, /* Afterburner NACK */
};
/* Receive header for v4 firmware. */
struct b43_rxhdr_fw4 {
__le16 frame_len; /* Frame length */
PAD_BYTES(2);
__le16 phy_status0; /* PHY RX Status 0 */
union {
/* RSSI for A/B/G-PHYs */
struct {
__u8 jssi; /* PHY RX Status 1: JSSI */
__u8 sig_qual; /* PHY RX Status 1: Signal Quality */
} __attribute__ ((__packed__));
/* RSSI for N-PHYs */
struct {
__s8 power0; /* PHY RX Status 1: Power 0 */
__s8 power1; /* PHY RX Status 1: Power 1 */
} __attribute__ ((__packed__));
} __attribute__ ((__packed__));
__le16 phy_status2; /* PHY RX Status 2 */
__le16 phy_status3; /* PHY RX Status 3 */
__le32 mac_status; /* MAC RX status */
__le16 mac_time;
__le16 channel;
} __attribute__ ((__packed__));
/* PHY RX Status 0 */
#define B43_RX_PHYST0_GAINCTL 0x4000 /* Gain Control */
#define B43_RX_PHYST0_PLCPHCF 0x0200
#define B43_RX_PHYST0_PLCPFV 0x0100
#define B43_RX_PHYST0_SHORTPRMBL 0x0080 /* Received with Short Preamble */
#define B43_RX_PHYST0_LCRS 0x0040
#define B43_RX_PHYST0_ANT 0x0020 /* Antenna */
#define B43_RX_PHYST0_UNSRATE 0x0010
#define B43_RX_PHYST0_CLIP 0x000C
#define B43_RX_PHYST0_CLIP_SHIFT 2
#define B43_RX_PHYST0_FTYPE 0x0003 /* Frame type */
#define B43_RX_PHYST0_CCK 0x0000 /* Frame type: CCK */
#define B43_RX_PHYST0_OFDM 0x0001 /* Frame type: OFDM */
#define B43_RX_PHYST0_PRE_N 0x0002 /* Pre-standard N-PHY frame */
#define B43_RX_PHYST0_STD_N 0x0003 /* Standard N-PHY frame */
/* PHY RX Status 2 */
#define B43_RX_PHYST2_LNAG 0xC000 /* LNA Gain */
#define B43_RX_PHYST2_LNAG_SHIFT 14
#define B43_RX_PHYST2_PNAG 0x3C00 /* PNA Gain */
#define B43_RX_PHYST2_PNAG_SHIFT 10
#define B43_RX_PHYST2_FOFF 0x03FF /* F offset */
/* PHY RX Status 3 */
#define B43_RX_PHYST3_DIGG 0x1800 /* DIG Gain */
#define B43_RX_PHYST3_DIGG_SHIFT 11
#define B43_RX_PHYST3_TRSTATE 0x0400 /* TR state */
/* MAC RX Status */
#define B43_RX_MAC_RXST_VALID 0x01000000 /* PHY RXST valid */
#define B43_RX_MAC_TKIP_MICERR 0x00100000 /* TKIP MIC error */
#define B43_RX_MAC_TKIP_MICATT 0x00080000 /* TKIP MIC attempted */
#define B43_RX_MAC_AGGTYPE 0x00060000 /* Aggregation type */
#define B43_RX_MAC_AGGTYPE_SHIFT 17
#define B43_RX_MAC_AMSDU 0x00010000 /* A-MSDU mask */
#define B43_RX_MAC_BEACONSENT 0x00008000 /* Beacon sent flag */
#define B43_RX_MAC_KEYIDX 0x000007E0 /* Key index */
#define B43_RX_MAC_KEYIDX_SHIFT 5
#define B43_RX_MAC_DECERR 0x00000010 /* Decrypt error */
#define B43_RX_MAC_DEC 0x00000008 /* Decryption attempted */
#define B43_RX_MAC_PADDING 0x00000004 /* Pad bytes present */
#define B43_RX_MAC_RESP 0x00000002 /* Response frame transmitted */
#define B43_RX_MAC_FCSERR 0x00000001 /* FCS error */
/* RX channel */
#define B43_RX_CHAN_40MHZ 0x1000 /* 40 Mhz channel width */
#define B43_RX_CHAN_5GHZ 0x0800 /* 5 Ghz band */
#define B43_RX_CHAN_ID 0x07F8 /* Channel ID */
#define B43_RX_CHAN_ID_SHIFT 3
#define B43_RX_CHAN_PHYTYPE 0x0007 /* PHY type */
u8 b43_plcp_get_ratecode_cck(const u8 bitrate);
u8 b43_plcp_get_ratecode_ofdm(const u8 bitrate);
void b43_generate_plcp_hdr(struct b43_plcp_hdr4 *plcp,
const u16 octets, const u8 bitrate);
void b43_rx(struct b43_wldev *dev, struct sk_buff *skb, const void *_rxhdr);
void b43_handle_txstatus(struct b43_wldev *dev,
const struct b43_txstatus *status);
bool b43_fill_txstatus_report(struct b43_wldev *dev,
struct ieee80211_tx_info *report,
const struct b43_txstatus *status);
void b43_tx_suspend(struct b43_wldev *dev);
void b43_tx_resume(struct b43_wldev *dev);
/* Helper functions for converting the key-table index from "firmware-format"
* to "raw-format" and back. The firmware API changed for this at some revision.
* We need to account for that here. */
static inline int b43_new_kidx_api(struct b43_wldev *dev)
{
/* FIXME: Not sure the change was at rev 351 */
return (dev->fw.rev >= 351);
}
static inline u8 b43_kidx_to_fw(struct b43_wldev *dev, u8 raw_kidx)
{
u8 firmware_kidx;
if (b43_new_kidx_api(dev)) {
firmware_kidx = raw_kidx;
} else {
if (raw_kidx >= 4) /* Is per STA key? */
firmware_kidx = raw_kidx - 4;
else
firmware_kidx = raw_kidx; /* TX default key */
}
return firmware_kidx;
}
static inline u8 b43_kidx_to_raw(struct b43_wldev *dev, u8 firmware_kidx)
{
u8 raw_kidx;
if (b43_new_kidx_api(dev))
raw_kidx = firmware_kidx;
else
raw_kidx = firmware_kidx + 4; /* RX default keys or per STA keys */
return raw_kidx;
}
/* struct b43_private_tx_info - TX info private to b43.
* The structure is placed in (struct ieee80211_tx_info *)->rate_driver_data
*
* @bouncebuffer: DMA Bouncebuffer (if used)
*/
struct b43_private_tx_info {
void *bouncebuffer;
};
static inline struct b43_private_tx_info *
b43_get_priv_tx_info(struct ieee80211_tx_info *info)
{
BUILD_BUG_ON(sizeof(struct b43_private_tx_info) >
sizeof(info->rate_driver_data));
return (struct b43_private_tx_info *)info->rate_driver_data;
}
#endif /* B43_XMIT_H_ */
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