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linux/drivers/net/wireless/ath/ath5k/desc.h
Bruno Randolf 3dd0923de4 ath5k: Optimize descriptor alignment 
Similar to Felix Fietkau <nbd@openwrt.org> "ath9k_hw: optimize all descriptor
access functions" (13db2a80244908833502189a24de82a856668b8a).

Signed-off-by: Bruno Randolf <br1@einfach.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2010-11-09 16:13:26 -05:00

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/*
* Copyright (c) 2004-2008 Reyk Floeter <reyk@openbsd.org>
* Copyright (c) 2006-2008 Nick Kossifidis <mickflemm@gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
/*
* RX/TX descriptor structures
*/
/*
* Common hardware RX control descriptor
*/
struct ath5k_hw_rx_ctl {
u32 rx_control_0; /* RX control word 0 */
u32 rx_control_1; /* RX control word 1 */
} __packed __aligned(4);
/* RX control word 1 fields/flags */
#define AR5K_DESC_RX_CTL1_BUF_LEN 0x00000fff /* data buffer length */
#define AR5K_DESC_RX_CTL1_INTREQ 0x00002000 /* RX interrupt request */
/*
* Common hardware RX status descriptor
* 5210, 5211 and 5212 differ only in the fields and flags defined below
*/
struct ath5k_hw_rx_status {
u32 rx_status_0; /* RX status word 0 */
u32 rx_status_1; /* RX status word 1 */
} __packed __aligned(4);
/* 5210/5211 */
/* RX status word 0 fields/flags */
#define AR5K_5210_RX_DESC_STATUS0_DATA_LEN 0x00000fff /* RX data length */
#define AR5K_5210_RX_DESC_STATUS0_MORE 0x00001000 /* more desc for this frame */
#define AR5K_5210_RX_DESC_STATUS0_RECEIVE_ANT_5210 0x00004000 /* [5210] receive on ant 1 */
#define AR5K_5210_RX_DESC_STATUS0_RECEIVE_RATE 0x00078000 /* reception rate */
#define AR5K_5210_RX_DESC_STATUS0_RECEIVE_RATE_S 15
#define AR5K_5210_RX_DESC_STATUS0_RECEIVE_SIGNAL 0x07f80000 /* rssi */
#define AR5K_5210_RX_DESC_STATUS0_RECEIVE_SIGNAL_S 19
#define AR5K_5210_RX_DESC_STATUS0_RECEIVE_ANT_5211 0x38000000 /* [5211] receive antenna */
#define AR5K_5210_RX_DESC_STATUS0_RECEIVE_ANT_5211_S 27
/* RX status word 1 fields/flags */
#define AR5K_5210_RX_DESC_STATUS1_DONE 0x00000001 /* descriptor complete */
#define AR5K_5210_RX_DESC_STATUS1_FRAME_RECEIVE_OK 0x00000002 /* reception success */
#define AR5K_5210_RX_DESC_STATUS1_CRC_ERROR 0x00000004 /* CRC error */
#define AR5K_5210_RX_DESC_STATUS1_FIFO_OVERRUN_5210 0x00000008 /* [5210] FIFO overrun */
#define AR5K_5210_RX_DESC_STATUS1_DECRYPT_CRC_ERROR 0x00000010 /* decyption CRC failure */
#define AR5K_5210_RX_DESC_STATUS1_PHY_ERROR 0x000000e0 /* PHY error */
#define AR5K_5210_RX_DESC_STATUS1_PHY_ERROR_S 5
#define AR5K_5210_RX_DESC_STATUS1_KEY_INDEX_VALID 0x00000100 /* key index valid */
#define AR5K_5210_RX_DESC_STATUS1_KEY_INDEX 0x00007e00 /* decyption key index */
#define AR5K_5210_RX_DESC_STATUS1_KEY_INDEX_S 9
#define AR5K_5210_RX_DESC_STATUS1_RECEIVE_TIMESTAMP 0x0fff8000 /* 13 bit of TSF */
#define AR5K_5210_RX_DESC_STATUS1_RECEIVE_TIMESTAMP_S 15
#define AR5K_5210_RX_DESC_STATUS1_KEY_CACHE_MISS 0x10000000 /* key cache miss */
/* 5212 */
/* RX status word 0 fields/flags */
#define AR5K_5212_RX_DESC_STATUS0_DATA_LEN 0x00000fff /* RX data length */
#define AR5K_5212_RX_DESC_STATUS0_MORE 0x00001000 /* more desc for this frame */
#define AR5K_5212_RX_DESC_STATUS0_DECOMP_CRC_ERROR 0x00002000 /* decompression CRC error */
#define AR5K_5212_RX_DESC_STATUS0_RECEIVE_RATE 0x000f8000 /* reception rate */
#define AR5K_5212_RX_DESC_STATUS0_RECEIVE_RATE_S 15
#define AR5K_5212_RX_DESC_STATUS0_RECEIVE_SIGNAL 0x0ff00000 /* rssi */
#define AR5K_5212_RX_DESC_STATUS0_RECEIVE_SIGNAL_S 20
#define AR5K_5212_RX_DESC_STATUS0_RECEIVE_ANTENNA 0xf0000000 /* receive antenna */
#define AR5K_5212_RX_DESC_STATUS0_RECEIVE_ANTENNA_S 28
/* RX status word 1 fields/flags */
#define AR5K_5212_RX_DESC_STATUS1_DONE 0x00000001 /* descriptor complete */
#define AR5K_5212_RX_DESC_STATUS1_FRAME_RECEIVE_OK 0x00000002 /* frame reception success */
#define AR5K_5212_RX_DESC_STATUS1_CRC_ERROR 0x00000004 /* CRC error */
#define AR5K_5212_RX_DESC_STATUS1_DECRYPT_CRC_ERROR 0x00000008 /* decryption CRC failure */
#define AR5K_5212_RX_DESC_STATUS1_PHY_ERROR 0x00000010 /* PHY error */
#define AR5K_5212_RX_DESC_STATUS1_MIC_ERROR 0x00000020 /* MIC decrypt error */
#define AR5K_5212_RX_DESC_STATUS1_KEY_INDEX_VALID 0x00000100 /* key index valid */
#define AR5K_5212_RX_DESC_STATUS1_KEY_INDEX 0x0000fe00 /* decryption key index */
#define AR5K_5212_RX_DESC_STATUS1_KEY_INDEX_S 9
#define AR5K_5212_RX_DESC_STATUS1_RECEIVE_TIMESTAMP 0x7fff0000 /* first 15bit of the TSF */
#define AR5K_5212_RX_DESC_STATUS1_RECEIVE_TIMESTAMP_S 16
#define AR5K_5212_RX_DESC_STATUS1_KEY_CACHE_MISS 0x80000000 /* key cache miss */
#define AR5K_5212_RX_DESC_STATUS1_PHY_ERROR_CODE 0x0000ff00 /* phy error code overlays key index and valid fields */
#define AR5K_5212_RX_DESC_STATUS1_PHY_ERROR_CODE_S 8
/**
* enum ath5k_phy_error_code - PHY Error codes
*/
enum ath5k_phy_error_code {
AR5K_RX_PHY_ERROR_UNDERRUN = 0, /* Transmit underrun, [5210] No error */
AR5K_RX_PHY_ERROR_TIMING = 1, /* Timing error */
AR5K_RX_PHY_ERROR_PARITY = 2, /* Illegal parity */
AR5K_RX_PHY_ERROR_RATE = 3, /* Illegal rate */
AR5K_RX_PHY_ERROR_LENGTH = 4, /* Illegal length */
AR5K_RX_PHY_ERROR_RADAR = 5, /* Radar detect, [5210] 64 QAM rate */
AR5K_RX_PHY_ERROR_SERVICE = 6, /* Illegal service */
AR5K_RX_PHY_ERROR_TOR = 7, /* Transmit override receive */
/* these are specific to the 5212 */
AR5K_RX_PHY_ERROR_OFDM_TIMING = 17,
AR5K_RX_PHY_ERROR_OFDM_SIGNAL_PARITY = 18,
AR5K_RX_PHY_ERROR_OFDM_RATE_ILLEGAL = 19,
AR5K_RX_PHY_ERROR_OFDM_LENGTH_ILLEGAL = 20,
AR5K_RX_PHY_ERROR_OFDM_POWER_DROP = 21,
AR5K_RX_PHY_ERROR_OFDM_SERVICE = 22,
AR5K_RX_PHY_ERROR_OFDM_RESTART = 23,
AR5K_RX_PHY_ERROR_CCK_TIMING = 25,
AR5K_RX_PHY_ERROR_CCK_HEADER_CRC = 26,
AR5K_RX_PHY_ERROR_CCK_RATE_ILLEGAL = 27,
AR5K_RX_PHY_ERROR_CCK_SERVICE = 30,
AR5K_RX_PHY_ERROR_CCK_RESTART = 31,
};
/*
* 5210/5211 hardware 2-word TX control descriptor
*/
struct ath5k_hw_2w_tx_ctl {
u32 tx_control_0; /* TX control word 0 */
u32 tx_control_1; /* TX control word 1 */
} __packed __aligned(4);
/* TX control word 0 fields/flags */
#define AR5K_2W_TX_DESC_CTL0_FRAME_LEN 0x00000fff /* frame length */
#define AR5K_2W_TX_DESC_CTL0_HEADER_LEN_5210 0x0003f000 /* [5210] header length */
#define AR5K_2W_TX_DESC_CTL0_HEADER_LEN_5210_S 12
#define AR5K_2W_TX_DESC_CTL0_XMIT_RATE 0x003c0000 /* tx rate */
#define AR5K_2W_TX_DESC_CTL0_XMIT_RATE_S 18
#define AR5K_2W_TX_DESC_CTL0_RTSENA 0x00400000 /* RTS/CTS enable */
#define AR5K_2W_TX_DESC_CTL0_LONG_PACKET_5210 0x00800000 /* [5210] long packet */
#define AR5K_2W_TX_DESC_CTL0_VEOL_5211 0x00800000 /* [5211] virtual end-of-list */
#define AR5K_2W_TX_DESC_CTL0_CLRDMASK 0x01000000 /* clear destination mask */
#define AR5K_2W_TX_DESC_CTL0_ANT_MODE_XMIT_5210 0x02000000 /* [5210] antenna selection */
#define AR5K_2W_TX_DESC_CTL0_ANT_MODE_XMIT_5211 0x1e000000 /* [5211] antenna selection */
#define AR5K_2W_TX_DESC_CTL0_ANT_MODE_XMIT \
(ah->ah_version == AR5K_AR5210 ? \
AR5K_2W_TX_DESC_CTL0_ANT_MODE_XMIT_5210 : \
AR5K_2W_TX_DESC_CTL0_ANT_MODE_XMIT_5211)
#define AR5K_2W_TX_DESC_CTL0_ANT_MODE_XMIT_S 25
#define AR5K_2W_TX_DESC_CTL0_FRAME_TYPE_5210 0x1c000000 /* [5210] frame type */
#define AR5K_2W_TX_DESC_CTL0_FRAME_TYPE_5210_S 26
#define AR5K_2W_TX_DESC_CTL0_INTREQ 0x20000000 /* TX interrupt request */
#define AR5K_2W_TX_DESC_CTL0_ENCRYPT_KEY_VALID 0x40000000 /* key is valid */
/* TX control word 1 fields/flags */
#define AR5K_2W_TX_DESC_CTL1_BUF_LEN 0x00000fff /* data buffer length */
#define AR5K_2W_TX_DESC_CTL1_MORE 0x00001000 /* more desc for this frame */
#define AR5K_2W_TX_DESC_CTL1_ENC_KEY_IDX_5210 0x0007e000 /* [5210] key table index */
#define AR5K_2W_TX_DESC_CTL1_ENC_KEY_IDX_5211 0x000fe000 /* [5211] key table index */
#define AR5K_2W_TX_DESC_CTL1_ENC_KEY_IDX \
(ah->ah_version == AR5K_AR5210 ? \
AR5K_2W_TX_DESC_CTL1_ENC_KEY_IDX_5210 : \
AR5K_2W_TX_DESC_CTL1_ENC_KEY_IDX_5211)
#define AR5K_2W_TX_DESC_CTL1_ENC_KEY_IDX_S 13
#define AR5K_2W_TX_DESC_CTL1_FRAME_TYPE_5211 0x00700000 /* [5211] frame type */
#define AR5K_2W_TX_DESC_CTL1_FRAME_TYPE_5211_S 20
#define AR5K_2W_TX_DESC_CTL1_NOACK_5211 0x00800000 /* [5211] no ACK */
#define AR5K_2W_TX_DESC_CTL1_RTS_DURATION_5210 0xfff80000 /* [5210] lower 13 bit of duration */
/* Frame types */
#define AR5K_AR5210_TX_DESC_FRAME_TYPE_NORMAL 0
#define AR5K_AR5210_TX_DESC_FRAME_TYPE_ATIM 1
#define AR5K_AR5210_TX_DESC_FRAME_TYPE_PSPOLL 2
#define AR5K_AR5210_TX_DESC_FRAME_TYPE_NO_DELAY 3
#define AR5K_AR5211_TX_DESC_FRAME_TYPE_BEACON 3
#define AR5K_AR5210_TX_DESC_FRAME_TYPE_PIFS 4
#define AR5K_AR5211_TX_DESC_FRAME_TYPE_PRESP 4
/*
* 5212 hardware 4-word TX control descriptor
*/
struct ath5k_hw_4w_tx_ctl {
u32 tx_control_0; /* TX control word 0 */
u32 tx_control_1; /* TX control word 1 */
u32 tx_control_2; /* TX control word 2 */
u32 tx_control_3; /* TX control word 3 */
} __packed __aligned(4);
/* TX control word 0 fields/flags */
#define AR5K_4W_TX_DESC_CTL0_FRAME_LEN 0x00000fff /* frame length */
#define AR5K_4W_TX_DESC_CTL0_XMIT_POWER 0x003f0000 /* transmit power */
#define AR5K_4W_TX_DESC_CTL0_XMIT_POWER_S 16
#define AR5K_4W_TX_DESC_CTL0_RTSENA 0x00400000 /* RTS/CTS enable */
#define AR5K_4W_TX_DESC_CTL0_VEOL 0x00800000 /* virtual end-of-list */
#define AR5K_4W_TX_DESC_CTL0_CLRDMASK 0x01000000 /* clear destination mask */
#define AR5K_4W_TX_DESC_CTL0_ANT_MODE_XMIT 0x1e000000 /* TX antenna selection */
#define AR5K_4W_TX_DESC_CTL0_ANT_MODE_XMIT_S 25
#define AR5K_4W_TX_DESC_CTL0_INTREQ 0x20000000 /* TX interrupt request */
#define AR5K_4W_TX_DESC_CTL0_ENCRYPT_KEY_VALID 0x40000000 /* destination index valid */
#define AR5K_4W_TX_DESC_CTL0_CTSENA 0x80000000 /* precede frame with CTS */
/* TX control word 1 fields/flags */
#define AR5K_4W_TX_DESC_CTL1_BUF_LEN 0x00000fff /* data buffer length */
#define AR5K_4W_TX_DESC_CTL1_MORE 0x00001000 /* more desc for this frame */
#define AR5K_4W_TX_DESC_CTL1_ENCRYPT_KEY_IDX 0x000fe000 /* destination table index */
#define AR5K_4W_TX_DESC_CTL1_ENCRYPT_KEY_IDX_S 13
#define AR5K_4W_TX_DESC_CTL1_FRAME_TYPE 0x00f00000 /* frame type */
#define AR5K_4W_TX_DESC_CTL1_FRAME_TYPE_S 20
#define AR5K_4W_TX_DESC_CTL1_NOACK 0x01000000 /* no ACK */
#define AR5K_4W_TX_DESC_CTL1_COMP_PROC 0x06000000 /* compression processing */
#define AR5K_4W_TX_DESC_CTL1_COMP_PROC_S 25
#define AR5K_4W_TX_DESC_CTL1_COMP_IV_LEN 0x18000000 /* length of frame IV */
#define AR5K_4W_TX_DESC_CTL1_COMP_IV_LEN_S 27
#define AR5K_4W_TX_DESC_CTL1_COMP_ICV_LEN 0x60000000 /* length of frame ICV */
#define AR5K_4W_TX_DESC_CTL1_COMP_ICV_LEN_S 29
/* TX control word 2 fields/flags */
#define AR5K_4W_TX_DESC_CTL2_RTS_DURATION 0x00007fff /* RTS/CTS duration */
#define AR5K_4W_TX_DESC_CTL2_DURATION_UPD_EN 0x00008000 /* frame duration update */
#define AR5K_4W_TX_DESC_CTL2_XMIT_TRIES0 0x000f0000 /* series 0 max attempts */
#define AR5K_4W_TX_DESC_CTL2_XMIT_TRIES0_S 16
#define AR5K_4W_TX_DESC_CTL2_XMIT_TRIES1 0x00f00000 /* series 1 max attempts */
#define AR5K_4W_TX_DESC_CTL2_XMIT_TRIES1_S 20
#define AR5K_4W_TX_DESC_CTL2_XMIT_TRIES2 0x0f000000 /* series 2 max attempts */
#define AR5K_4W_TX_DESC_CTL2_XMIT_TRIES2_S 24
#define AR5K_4W_TX_DESC_CTL2_XMIT_TRIES3 0xf0000000 /* series 3 max attempts */
#define AR5K_4W_TX_DESC_CTL2_XMIT_TRIES3_S 28
/* TX control word 3 fields/flags */
#define AR5K_4W_TX_DESC_CTL3_XMIT_RATE0 0x0000001f /* series 0 tx rate */
#define AR5K_4W_TX_DESC_CTL3_XMIT_RATE1 0x000003e0 /* series 1 tx rate */
#define AR5K_4W_TX_DESC_CTL3_XMIT_RATE1_S 5
#define AR5K_4W_TX_DESC_CTL3_XMIT_RATE2 0x00007c00 /* series 2 tx rate */
#define AR5K_4W_TX_DESC_CTL3_XMIT_RATE2_S 10
#define AR5K_4W_TX_DESC_CTL3_XMIT_RATE3 0x000f8000 /* series 3 tx rate */
#define AR5K_4W_TX_DESC_CTL3_XMIT_RATE3_S 15
#define AR5K_4W_TX_DESC_CTL3_RTS_CTS_RATE 0x01f00000 /* RTS or CTS rate */
#define AR5K_4W_TX_DESC_CTL3_RTS_CTS_RATE_S 20
/*
* Common TX status descriptor
*/
struct ath5k_hw_tx_status {
u32 tx_status_0; /* TX status word 0 */
u32 tx_status_1; /* TX status word 1 */
} __packed __aligned(4);
/* TX status word 0 fields/flags */
#define AR5K_DESC_TX_STATUS0_FRAME_XMIT_OK 0x00000001 /* TX success */
#define AR5K_DESC_TX_STATUS0_EXCESSIVE_RETRIES 0x00000002 /* excessive retries */
#define AR5K_DESC_TX_STATUS0_FIFO_UNDERRUN 0x00000004 /* FIFO underrun */
#define AR5K_DESC_TX_STATUS0_FILTERED 0x00000008 /* TX filter indication */
/* according to the HAL sources the spec has short/long retry counts reversed.
* we have it reversed to the HAL sources as well, for 5210 and 5211.
* For 5212 these fields are defined as RTS_FAIL_COUNT and DATA_FAIL_COUNT,
* but used respectively as SHORT and LONG retry count in the code later. This
* is consistent with the definitions here... TODO: check */
#define AR5K_DESC_TX_STATUS0_SHORT_RETRY_COUNT 0x000000f0 /* short retry count */
#define AR5K_DESC_TX_STATUS0_SHORT_RETRY_COUNT_S 4
#define AR5K_DESC_TX_STATUS0_LONG_RETRY_COUNT 0x00000f00 /* long retry count */
#define AR5K_DESC_TX_STATUS0_LONG_RETRY_COUNT_S 8
#define AR5K_DESC_TX_STATUS0_VIRTCOLL_CT_5211 0x0000f000 /* [5211+] virtual collision count */
#define AR5K_DESC_TX_STATUS0_VIRTCOLL_CT_5212_S 12
#define AR5K_DESC_TX_STATUS0_SEND_TIMESTAMP 0xffff0000 /* TX timestamp */
#define AR5K_DESC_TX_STATUS0_SEND_TIMESTAMP_S 16
/* TX status word 1 fields/flags */
#define AR5K_DESC_TX_STATUS1_DONE 0x00000001 /* descriptor complete */
#define AR5K_DESC_TX_STATUS1_SEQ_NUM 0x00001ffe /* TX sequence number */
#define AR5K_DESC_TX_STATUS1_SEQ_NUM_S 1
#define AR5K_DESC_TX_STATUS1_ACK_SIG_STRENGTH 0x001fe000 /* signal strength of ACK */
#define AR5K_DESC_TX_STATUS1_ACK_SIG_STRENGTH_S 13
#define AR5K_DESC_TX_STATUS1_FINAL_TS_IX_5212 0x00600000 /* [5212] final TX attempt series ix */
#define AR5K_DESC_TX_STATUS1_FINAL_TS_IX_5212_S 21
#define AR5K_DESC_TX_STATUS1_COMP_SUCCESS_5212 0x00800000 /* [5212] compression status */
#define AR5K_DESC_TX_STATUS1_XMIT_ANTENNA_5212 0x01000000 /* [5212] transmit antenna */
/*
* 5210/5211 hardware TX descriptor
*/
struct ath5k_hw_5210_tx_desc {
struct ath5k_hw_2w_tx_ctl tx_ctl;
struct ath5k_hw_tx_status tx_stat;
} __packed __aligned(4);
/*
* 5212 hardware TX descriptor
*/
struct ath5k_hw_5212_tx_desc {
struct ath5k_hw_4w_tx_ctl tx_ctl;
struct ath5k_hw_tx_status tx_stat;
} __packed __aligned(4);
/*
* Common hardware RX descriptor
*/
struct ath5k_hw_all_rx_desc {
struct ath5k_hw_rx_ctl rx_ctl;
struct ath5k_hw_rx_status rx_stat;
} __packed __aligned(4);
/*
* Atheros hardware DMA descriptor
* This is read and written to by the hardware
*/
struct ath5k_desc {
u32 ds_link; /* physical address of the next descriptor */
u32 ds_data; /* physical address of data buffer (skb) */
union {
struct ath5k_hw_5210_tx_desc ds_tx5210;
struct ath5k_hw_5212_tx_desc ds_tx5212;
struct ath5k_hw_all_rx_desc ds_rx;
} ud;
} __packed __aligned(4);
#define AR5K_RXDESC_INTREQ 0x0020
#define AR5K_TXDESC_CLRDMASK 0x0001
#define AR5K_TXDESC_NOACK 0x0002 /*[5211+]*/
#define AR5K_TXDESC_RTSENA 0x0004
#define AR5K_TXDESC_CTSENA 0x0008
#define AR5K_TXDESC_INTREQ 0x0010
#define AR5K_TXDESC_VEOL 0x0020 /*[5211+]*/
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