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 288