drivers/net/wireless/wl12xx/wl1271_tx.h

   1 /*
   2  * This file is part of wl1271
   3  *
   4  * Copyright (C) 1998-2009 Texas Instruments. All rights reserved.
   5  * Copyright (C) 2009 Nokia Corporation
   6  *
   7  * Contact: Luciano Coelho <luciano.coelho@nokia.com>
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License
  11  * version 2 as published by the Free Software Foundation.
  12  *
  13  * This program is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  21  * 02110-1301 USA
  22  *
  23  */
  24
  25 #ifndef __WL1271_TX_H__
  26 #define __WL1271_TX_H__
  27
  28 #define TX_HW_BLOCK_SPARE                2
  29 #define TX_HW_BLOCK_SHIFT_DIV            8
  30
  31 #define TX_HW_MGMT_PKT_LIFETIME_TU       2000
  32 /* The chipset reference driver states, that the "aid" value 1
  33  * is for infra-BSS, but is still always used */
  34 #define TX_HW_DEFAULT_AID                1
  35
  36 #define TX_HW_ATTR_SAVE_RETRIES          BIT(0)
  37 #define TX_HW_ATTR_HEADER_PAD            BIT(1)
  38 #define TX_HW_ATTR_SESSION_COUNTER       (BIT(2) | BIT(3) | BIT(4))
  39 #define TX_HW_ATTR_RATE_POLICY           (BIT(5) | BIT(6) | BIT(7) | \
  40                                           BIT(8) | BIT(9))
  41 #define TX_HW_ATTR_LAST_WORD_PAD         (BIT(10) | BIT(11))
  42 #define TX_HW_ATTR_TX_CMPLT_REQ          BIT(12)
  43
  44 #define TX_HW_ATTR_OFST_SAVE_RETRIES     0
  45 #define TX_HW_ATTR_OFST_HEADER_PAD       1
  46 #define TX_HW_ATTR_OFST_SESSION_COUNTER  2
  47 #define TX_HW_ATTR_OFST_RATE_POLICY      5
  48 #define TX_HW_ATTR_OFST_LAST_WORD_PAD    10
  49 #define TX_HW_ATTR_OFST_TX_CMPLT_REQ     12
  50
  51 #define TX_HW_RESULT_QUEUE_LEN           16
  52 #define TX_HW_RESULT_QUEUE_LEN_MASK      0xf
  53
  54 #define WL1271_TX_ALIGN_TO 4
  55 #define WL1271_TX_ALIGN(len) (((len) + WL1271_TX_ALIGN_TO - 1) & \
  56                              ~(WL1271_TX_ALIGN_TO - 1))
  57 #define WL1271_TKIP_IV_SPACE 4
  58
  59 struct wl1271_tx_hw_descr {
  60         /* Length of packet in words, including descriptor+header+data */
  61         u16 length;
  62         /* Number of extra memory blocks to allocate for this packet in
  63            addition to the number of blocks derived from the packet length */
  64         u8 extra_mem_blocks;
  65         /* Total number of memory blocks allocated by the host for this packet.
  66            Must be equal or greater than the actual blocks number allocated by
  67            HW!! */
  68         u8 total_mem_blocks;
  69         /* Device time (in us) when the packet arrived to the driver */
  70         u32 start_time;
  71         /* Max delay in TUs until transmission. The last device time the
  72            packet can be transmitted is: startTime+(1024*LifeTime) */
  73         u16 life_time;
  74         /* Bitwise fields - see TX_ATTR... definitions above. */
  75         u16 tx_attr;
  76         /* Packet identifier used also in the Tx-Result. */
  77         u8 id;
  78         /* The packet TID value (as User-Priority) */
  79         u8 tid;
  80         /* Identifier of the remote STA in IBSS, 1 in infra-BSS */
  81         u8 aid;
  82         u8 reserved;
  83 } __attribute__ ((packed));
  84
  85 enum wl1271_tx_hw_res_status {
  86         TX_SUCCESS          = 0,
  87         TX_HW_ERROR         = 1,
  88         TX_DISABLED         = 2,
  89         TX_RETRY_EXCEEDED   = 3,
  90         TX_TIMEOUT          = 4,
  91         TX_KEY_NOT_FOUND    = 5,
  92         TX_PEER_NOT_FOUND   = 6,
  93         TX_SESSION_MISMATCH = 7
  94 };
  95
  96 struct wl1271_tx_hw_res_descr {
  97         /* Packet Identifier - same value used in the Tx descriptor.*/
  98         u8 id;
  99         /* The status of the transmission, indicating success or one of
 100            several possible reasons for failure. */
 101         u8 status;
 102         /* Total air access duration including all retrys and overheads.*/
 103         u16 medium_usage;
 104         /* The time passed from host xfer to Tx-complete.*/
 105         u32 fw_handling_time;
 106         /* Total media delay
 107            (from 1st EDCA AIFS counter until TX Complete). */
 108         u32 medium_delay;
 109         /* LS-byte of last TKIP seq-num (saved per AC for recovery). */
 110         u8 lsb_security_sequence_number;
 111         /* Retry count - number of transmissions without successful ACK.*/
 112         u8 ack_failures;
 113         /* The rate that succeeded getting ACK
 114            (Valid only if status=SUCCESS). */
 115         u8 rate_class_index;
 116         /* for 4-byte alignment. */
 117         u8 spare;
 118 } __attribute__ ((packed));
 119
 120 struct wl1271_tx_hw_res_if {
 121         u32 tx_result_fw_counter;
 122         u32 tx_result_host_counter;
 123         struct wl1271_tx_hw_res_descr tx_results_queue[TX_HW_RESULT_QUEUE_LEN];
 124 } __attribute__ ((packed));
 125
 126 void wl1271_tx_work(struct work_struct *work);
 127 void wl1271_tx_complete(struct wl1271 *wl, u32 count);
 128 void wl1271_tx_flush(struct wl1271 *wl);
 129
 130 #endif