drivers/net/wireless/ti/wlcore/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 __TX_H__
  26 #define __TX_H__
  27
  28 #define TX_HW_MGMT_PKT_LIFETIME_TU       2000
  29 #define TX_HW_AP_MODE_PKT_LIFETIME_TU    8000
  30
  31 #define TX_HW_ATTR_SAVE_RETRIES          BIT(0)
  32 #define TX_HW_ATTR_HEADER_PAD            BIT(1)
  33 #define TX_HW_ATTR_SESSION_COUNTER       (BIT(2) | BIT(3) | BIT(4))
  34 #define TX_HW_ATTR_RATE_POLICY           (BIT(5) | BIT(6) | BIT(7) | \
  35                                           BIT(8) | BIT(9))
  36 #define TX_HW_ATTR_LAST_WORD_PAD         (BIT(10) | BIT(11))
  37 #define TX_HW_ATTR_TX_CMPLT_REQ          BIT(12)
  38 #define TX_HW_ATTR_TX_DUMMY_REQ          BIT(13)
  39 #define TX_HW_ATTR_HOST_ENCRYPT          BIT(14)
  40 #define TX_HW_ATTR_EAPOL_FRAME           BIT(15)
  41
  42 #define TX_HW_ATTR_OFST_SAVE_RETRIES     0
  43 #define TX_HW_ATTR_OFST_HEADER_PAD       1
  44 #define TX_HW_ATTR_OFST_SESSION_COUNTER  2
  45 #define TX_HW_ATTR_OFST_RATE_POLICY      5
  46 #define TX_HW_ATTR_OFST_LAST_WORD_PAD    10
  47 #define TX_HW_ATTR_OFST_TX_CMPLT_REQ     12
  48
  49 #define TX_HW_RESULT_QUEUE_LEN           16
  50 #define TX_HW_RESULT_QUEUE_LEN_MASK      0xf
  51
  52 #define WL1271_TX_ALIGN_TO 4
  53 #define WL1271_EXTRA_SPACE_TKIP 4
  54 #define WL1271_EXTRA_SPACE_AES  8
  55 #define WL1271_EXTRA_SPACE_MAX  8
  56
  57 /* Used for management frames and dummy packets */
  58 #define WL1271_TID_MGMT 7
  59
  60 /* stop a ROC for pending authentication reply after this time (ms) */
  61 #define WLCORE_PEND_AUTH_ROC_TIMEOUT     1000
  62
  63 struct wl127x_tx_mem {
  64         /*
  65          * Number of extra memory blocks to allocate for this packet
  66          * in addition to the number of blocks derived from the packet
  67          * length.
  68          */
  69         u8 extra_blocks;
  70         /*
  71          * Total number of memory blocks allocated by the host for
  72          * this packet. Must be equal or greater than the actual
  73          * blocks number allocated by HW.
  74          */
  75         u8 total_mem_blocks;
  76 } __packed;
  77
  78 struct wl128x_tx_mem {
  79         /*
  80          * Total number of memory blocks allocated by the host for
  81          * this packet.
  82          */
  83         u8 total_mem_blocks;
  84         /*
  85          * Number of extra bytes, at the end of the frame. the host
  86          * uses this padding to complete each frame to integer number
  87          * of SDIO blocks.
  88          */
  89         u8 extra_bytes;
  90 } __packed;
  91
  92 struct wl18xx_tx_mem {
  93         /*
  94          * Total number of memory blocks allocated by the host for
  95          * this packet.
  96          */
  97         u8 total_mem_blocks;
  98
  99         /*
 100          * control bits
 101          */
 102         u8 ctrl;
 103 } __packed;
 104
 105 /*
 106  * On wl128x based devices, when TX packets are aggregated, each packet
 107  * size must be aligned to the SDIO block size. The maximum block size
 108  * is bounded by the type of the padded bytes field that is sent to the
 109  * FW. Currently the type is u8, so the maximum block size is 256 bytes.
 110  */
 111 #define WL12XX_BUS_BLOCK_SIZE min(512u, \
 112             (1u << (8 * sizeof(((struct wl128x_tx_mem *) 0)->extra_bytes))))
 113
 114 struct wl1271_tx_hw_descr {
 115         /* Length of packet in words, including descriptor+header+data */
 116         __le16 length;
 117         union {
 118                 struct wl127x_tx_mem wl127x_mem;
 119                 struct wl128x_tx_mem wl128x_mem;
 120                 struct wl18xx_tx_mem wl18xx_mem;
 121         } __packed;
 122         /* Device time (in us) when the packet arrived to the driver */
 123         __le32 start_time;
 124         /*
 125          * Max delay in TUs until transmission. The last device time the
 126          * packet can be transmitted is: start_time + (1024 * life_time)
 127          */
 128         __le16 life_time;
 129         /* Bitwise fields - see TX_ATTR... definitions above. */
 130         __le16 tx_attr;
 131         /* Packet identifier used also in the Tx-Result. */
 132         u8 id;
 133         /* The packet TID value (as User-Priority) */
 134         u8 tid;
 135         /* host link ID (HLID) */
 136         u8 hlid;
 137
 138         union {
 139                 u8 wl12xx_reserved;
 140
 141                 /*
 142                  * bit 0   -> 0 = udp, 1 = tcp
 143                  * bit 1:7 -> IP header offset
 144                  */
 145                 u8 wl18xx_checksum_data;
 146         } __packed;
 147 } __packed;
 148
 149 enum wl1271_tx_hw_res_status {
 150         TX_SUCCESS          = 0,
 151         TX_HW_ERROR         = 1,
 152         TX_DISABLED         = 2,
 153         TX_RETRY_EXCEEDED   = 3,
 154         TX_TIMEOUT          = 4,
 155         TX_KEY_NOT_FOUND    = 5,
 156         TX_PEER_NOT_FOUND   = 6,
 157         TX_SESSION_MISMATCH = 7,
 158         TX_LINK_NOT_VALID   = 8,
 159 };
 160
 161 struct wl1271_tx_hw_res_descr {
 162         /* Packet Identifier - same value used in the Tx descriptor.*/
 163         u8 id;
 164         /* The status of the transmission, indicating success or one of
 165            several possible reasons for failure. */
 166         u8 status;
 167         /* Total air access duration including all retrys and overheads.*/
 168         __le16 medium_usage;
 169         /* The time passed from host xfer to Tx-complete.*/
 170         __le32 fw_handling_time;
 171         /* Total media delay
 172            (from 1st EDCA AIFS counter until TX Complete). */
 173         __le32 medium_delay;
 174         /* LS-byte of last TKIP seq-num (saved per AC for recovery). */
 175         u8 tx_security_sequence_number_lsb;
 176         /* Retry count - number of transmissions without successful ACK.*/
 177         u8 ack_failures;
 178         /* The rate that succeeded getting ACK
 179            (Valid only if status=SUCCESS). */
 180         u8 rate_class_index;
 181         /* for 4-byte alignment. */
 182         u8 spare;
 183 } __packed;
 184
 185 struct wl1271_tx_hw_res_if {
 186         __le32 tx_result_fw_counter;
 187         __le32 tx_result_host_counter;
 188         struct wl1271_tx_hw_res_descr tx_results_queue[TX_HW_RESULT_QUEUE_LEN];
 189 } __packed;
 190
 191 enum wlcore_queue_stop_reason {
 192         WLCORE_QUEUE_STOP_REASON_WATERMARK,
 193         WLCORE_QUEUE_STOP_REASON_FW_RESTART,
 194         WLCORE_QUEUE_STOP_REASON_FLUSH,
 195         WLCORE_QUEUE_STOP_REASON_SPARE_BLK, /* 18xx specific */
 196 };
 197
 198 static inline int wl1271_tx_get_queue(int queue)
 199 {
 200         switch (queue) {
 201         case 0:
 202                 return CONF_TX_AC_VO;
 203         case 1:
 204                 return CONF_TX_AC_VI;
 205         case 2:
 206                 return CONF_TX_AC_BE;
 207         case 3:
 208                 return CONF_TX_AC_BK;
 209         default:
 210                 return CONF_TX_AC_BE;
 211         }
 212 }
 213
 214 static inline
 215 int wlcore_tx_get_mac80211_queue(struct wl12xx_vif *wlvif, int queue)
 216 {
 217         int mac_queue = wlvif->hw_queue_base;
 218
 219         switch (queue) {
 220         case CONF_TX_AC_VO:
 221                 return mac_queue + 0;
 222         case CONF_TX_AC_VI:
 223                 return mac_queue + 1;
 224         case CONF_TX_AC_BE:
 225                 return mac_queue + 2;
 226         case CONF_TX_AC_BK:
 227                 return mac_queue + 3;
 228         default:
 229                 return mac_queue + 2;
 230         }
 231 }
 232
 233 static inline int wl1271_tx_total_queue_count(struct wl1271 *wl)
 234 {
 235         int i, count = 0;
 236
 237         for (i = 0; i < NUM_TX_QUEUES; i++)
 238                 count += wl->tx_queue_count[i];
 239
 240         return count;
 241 }
 242
 243 void wl1271_tx_work(struct work_struct *work);
 244 int wlcore_tx_work_locked(struct wl1271 *wl);
 245 int wlcore_tx_complete(struct wl1271 *wl);
 246 void wl12xx_tx_reset_wlvif(struct wl1271 *wl, struct wl12xx_vif *wlvif);
 247 void wl12xx_tx_reset(struct wl1271 *wl);
 248 void wl1271_tx_flush(struct wl1271 *wl);
 249 u8 wlcore_rate_to_idx(struct wl1271 *wl, u8 rate, enum nl80211_band band);
 250 u32 wl1271_tx_enabled_rates_get(struct wl1271 *wl, u32 rate_set,
 251                                 enum nl80211_band rate_band);
 252 u32 wl1271_tx_min_rate_get(struct wl1271 *wl, u32 rate_set);
 253 u8 wl12xx_tx_get_hlid(struct wl1271 *wl, struct wl12xx_vif *wlvif,
 254                       struct sk_buff *skb, struct ieee80211_sta *sta);
 255 void wl1271_tx_reset_link_queues(struct wl1271 *wl, u8 hlid);
 256 void wl1271_handle_tx_low_watermark(struct wl1271 *wl);
 257 bool wl12xx_is_dummy_packet(struct wl1271 *wl, struct sk_buff *skb);
 258 void wl12xx_rearm_rx_streaming(struct wl1271 *wl, unsigned long *active_hlids);
 259 unsigned int wlcore_calc_packet_alignment(struct wl1271 *wl,
 260                                           unsigned int packet_length);
 261 void wl1271_free_tx_id(struct wl1271 *wl, int id);
 262 void wlcore_stop_queue_locked(struct wl1271 *wl, struct wl12xx_vif *wlvif,
 263                               u8 queue, enum wlcore_queue_stop_reason reason);
 264 void wlcore_stop_queue(struct wl1271 *wl, struct wl12xx_vif *wlvif, u8 queue,
 265                        enum wlcore_queue_stop_reason reason);
 266 void wlcore_wake_queue(struct wl1271 *wl, struct wl12xx_vif *wlvif, u8 queue,
 267                        enum wlcore_queue_stop_reason reason);
 268 void wlcore_stop_queues(struct wl1271 *wl,
 269                         enum wlcore_queue_stop_reason reason);
 270 void wlcore_wake_queues(struct wl1271 *wl,
 271                         enum wlcore_queue_stop_reason reason);
 272 bool wlcore_is_queue_stopped_by_reason(struct wl1271 *wl,
 273                                        struct wl12xx_vif *wlvif, u8 queue,
 274                                        enum wlcore_queue_stop_reason reason);
 275 bool
 276 wlcore_is_queue_stopped_by_reason_locked(struct wl1271 *wl,
 277                                          struct wl12xx_vif *wlvif,
 278                                          u8 queue,
 279                                          enum wlcore_queue_stop_reason reason);
 280 bool wlcore_is_queue_stopped_locked(struct wl1271 *wl, struct wl12xx_vif *wlvif,
 281                                     u8 queue);
 282
 283 /* from main.c */
 284 void wl1271_free_sta(struct wl1271 *wl, struct wl12xx_vif *wlvif, u8 hlid);
 285 void wl12xx_rearm_tx_watchdog_locked(struct wl1271 *wl);
 286
 287 #endif