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ada9f1cacb
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>
123 lines
3.5 KiB
C
123 lines
3.5 KiB
C
/*
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* Copyright (c) 2010 Atheros Communications Inc.
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifndef AR9003_MAC_H
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#define AR9003_MAC_H
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#define AR_DescId 0xffff0000
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#define AR_DescId_S 16
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#define AR_CtrlStat 0x00004000
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#define AR_CtrlStat_S 14
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#define AR_TxRxDesc 0x00008000
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#define AR_TxRxDesc_S 15
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#define AR_TxQcuNum 0x00000f00
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#define AR_TxQcuNum_S 8
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#define AR_BufLen 0x0fff0000
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#define AR_BufLen_S 16
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#define AR_TxDescId 0xffff0000
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#define AR_TxDescId_S 16
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#define AR_TxPtrChkSum 0x0000ffff
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#define AR_LowRxChain 0x00004000
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#define AR_Not_Sounding 0x20000000
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/* ctl 12 */
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#define AR_PAPRDChainMask 0x00000e00
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#define AR_PAPRDChainMask_S 9
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#define MAP_ISR_S2_CST 6
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#define MAP_ISR_S2_GTT 6
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#define MAP_ISR_S2_TIM 3
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#define MAP_ISR_S2_CABEND 0
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#define MAP_ISR_S2_DTIMSYNC 7
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#define MAP_ISR_S2_DTIM 7
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#define MAP_ISR_S2_TSFOOR 4
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#define MAP_ISR_S2_BB_WATCHDOG 6
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#define AR9003TXC_CONST(_ds) ((const struct ar9003_txc *) _ds)
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struct ar9003_rxs {
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u32 ds_info;
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u32 status1;
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u32 status2;
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u32 status3;
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u32 status4;
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u32 status5;
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u32 status6;
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u32 status7;
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u32 status8;
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u32 status9;
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u32 status10;
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u32 status11;
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} __packed __aligned(4);
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/* Transmit Control Descriptor */
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struct ar9003_txc {
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u32 info; /* descriptor information */
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u32 link; /* link pointer */
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u32 data0; /* data pointer to 1st buffer */
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u32 ctl3; /* DMA control 3 */
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u32 data1; /* data pointer to 2nd buffer */
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u32 ctl5; /* DMA control 5 */
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u32 data2; /* data pointer to 3rd buffer */
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u32 ctl7; /* DMA control 7 */
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u32 data3; /* data pointer to 4th buffer */
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u32 ctl9; /* DMA control 9 */
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u32 ctl10; /* DMA control 10 */
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u32 ctl11; /* DMA control 11 */
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u32 ctl12; /* DMA control 12 */
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u32 ctl13; /* DMA control 13 */
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u32 ctl14; /* DMA control 14 */
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u32 ctl15; /* DMA control 15 */
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u32 ctl16; /* DMA control 16 */
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u32 ctl17; /* DMA control 17 */
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u32 ctl18; /* DMA control 18 */
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u32 ctl19; /* DMA control 19 */
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u32 ctl20; /* DMA control 20 */
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u32 ctl21; /* DMA control 21 */
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u32 ctl22; /* DMA control 22 */
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u32 pad[9]; /* pad to cache line (128 bytes/32 dwords) */
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} __packed __aligned(4);
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struct ar9003_txs {
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u32 ds_info;
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u32 status1;
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u32 status2;
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u32 status3;
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u32 status4;
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u32 status5;
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u32 status6;
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u32 status7;
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u32 status8;
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} __packed __aligned(4);
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void ar9003_hw_attach_mac_ops(struct ath_hw *hw);
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void ath9k_hw_set_rx_bufsize(struct ath_hw *ah, u16 buf_size);
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void ath9k_hw_addrxbuf_edma(struct ath_hw *ah, u32 rxdp,
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enum ath9k_rx_qtype qtype);
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int ath9k_hw_process_rxdesc_edma(struct ath_hw *ah,
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struct ath_rx_status *rxs,
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void *buf_addr);
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void ath9k_hw_reset_txstatus_ring(struct ath_hw *ah);
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void ath9k_hw_setup_statusring(struct ath_hw *ah, void *ts_start,
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u32 ts_paddr_start,
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u8 size);
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#endif
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