linux/drivers/net/wireless/ath/ath9k/ar9003_mac.h
Felix Fietkau ada9f1cacb ath9k_hw: optimize all descriptor access functions
Because all of the descriptor data structures are marked as __packed, GCC
assumes the worst case wrt. alignment and generates unaligned load/store
instructions on MIPS for access to all fields.
Since descriptors always have to be 4-byte-aligned, we can just mark the
data structures with __aligned(4), which allows GCC to generate much more
efficient code.
Verified through disassembly and OProfile comparisons.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
2010-11-09 16:13:25 -05:00

123 lines
3.5 KiB
C

/*
* Copyright (c) 2010 Atheros Communications Inc.
*
* Permission to use, copy, modify, and/or 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.
*/
#ifndef AR9003_MAC_H
#define AR9003_MAC_H
#define AR_DescId 0xffff0000
#define AR_DescId_S 16
#define AR_CtrlStat 0x00004000
#define AR_CtrlStat_S 14
#define AR_TxRxDesc 0x00008000
#define AR_TxRxDesc_S 15
#define AR_TxQcuNum 0x00000f00
#define AR_TxQcuNum_S 8
#define AR_BufLen 0x0fff0000
#define AR_BufLen_S 16
#define AR_TxDescId 0xffff0000
#define AR_TxDescId_S 16
#define AR_TxPtrChkSum 0x0000ffff
#define AR_LowRxChain 0x00004000
#define AR_Not_Sounding 0x20000000
/* ctl 12 */
#define AR_PAPRDChainMask 0x00000e00
#define AR_PAPRDChainMask_S 9
#define MAP_ISR_S2_CST 6
#define MAP_ISR_S2_GTT 6
#define MAP_ISR_S2_TIM 3
#define MAP_ISR_S2_CABEND 0
#define MAP_ISR_S2_DTIMSYNC 7
#define MAP_ISR_S2_DTIM 7
#define MAP_ISR_S2_TSFOOR 4
#define MAP_ISR_S2_BB_WATCHDOG 6
#define AR9003TXC_CONST(_ds) ((const struct ar9003_txc *) _ds)
struct ar9003_rxs {
u32 ds_info;
u32 status1;
u32 status2;
u32 status3;
u32 status4;
u32 status5;
u32 status6;
u32 status7;
u32 status8;
u32 status9;
u32 status10;
u32 status11;
} __packed __aligned(4);
/* Transmit Control Descriptor */
struct ar9003_txc {
u32 info; /* descriptor information */
u32 link; /* link pointer */
u32 data0; /* data pointer to 1st buffer */
u32 ctl3; /* DMA control 3 */
u32 data1; /* data pointer to 2nd buffer */
u32 ctl5; /* DMA control 5 */
u32 data2; /* data pointer to 3rd buffer */
u32 ctl7; /* DMA control 7 */
u32 data3; /* data pointer to 4th buffer */
u32 ctl9; /* DMA control 9 */
u32 ctl10; /* DMA control 10 */
u32 ctl11; /* DMA control 11 */
u32 ctl12; /* DMA control 12 */
u32 ctl13; /* DMA control 13 */
u32 ctl14; /* DMA control 14 */
u32 ctl15; /* DMA control 15 */
u32 ctl16; /* DMA control 16 */
u32 ctl17; /* DMA control 17 */
u32 ctl18; /* DMA control 18 */
u32 ctl19; /* DMA control 19 */
u32 ctl20; /* DMA control 20 */
u32 ctl21; /* DMA control 21 */
u32 ctl22; /* DMA control 22 */
u32 pad[9]; /* pad to cache line (128 bytes/32 dwords) */
} __packed __aligned(4);
struct ar9003_txs {
u32 ds_info;
u32 status1;
u32 status2;
u32 status3;
u32 status4;
u32 status5;
u32 status6;
u32 status7;
u32 status8;
} __packed __aligned(4);
void ar9003_hw_attach_mac_ops(struct ath_hw *hw);
void ath9k_hw_set_rx_bufsize(struct ath_hw *ah, u16 buf_size);
void ath9k_hw_addrxbuf_edma(struct ath_hw *ah, u32 rxdp,
enum ath9k_rx_qtype qtype);
int ath9k_hw_process_rxdesc_edma(struct ath_hw *ah,
struct ath_rx_status *rxs,
void *buf_addr);
void ath9k_hw_reset_txstatus_ring(struct ath_hw *ah);
void ath9k_hw_setup_statusring(struct ath_hw *ah, void *ts_start,
u32 ts_paddr_start,
u8 size);
#endif