/* * This file is part of wl1271 * * Copyright (C) 1998-2009 Texas Instruments. All rights reserved. * Copyright (C) 2009 Nokia Corporation * * Contact: Luciano Coelho * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * version 2 as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA * 02110-1301 USA * */ #ifndef __TX_H__ #define __TX_H__ #define TX_HW_BLOCK_SIZE 252 #define TX_HW_MGMT_PKT_LIFETIME_TU 2000 #define TX_HW_AP_MODE_PKT_LIFETIME_TU 8000 #define TX_HW_ATTR_SAVE_RETRIES BIT(0) #define TX_HW_ATTR_HEADER_PAD BIT(1) #define TX_HW_ATTR_SESSION_COUNTER (BIT(2) | BIT(3) | BIT(4)) #define TX_HW_ATTR_RATE_POLICY (BIT(5) | BIT(6) | BIT(7) | \ BIT(8) | BIT(9)) #define TX_HW_ATTR_LAST_WORD_PAD (BIT(10) | BIT(11)) #define TX_HW_ATTR_TX_CMPLT_REQ BIT(12) #define TX_HW_ATTR_TX_DUMMY_REQ BIT(13) #define TX_HW_ATTR_OFST_SAVE_RETRIES 0 #define TX_HW_ATTR_OFST_HEADER_PAD 1 #define TX_HW_ATTR_OFST_SESSION_COUNTER 2 #define TX_HW_ATTR_OFST_RATE_POLICY 5 #define TX_HW_ATTR_OFST_LAST_WORD_PAD 10 #define TX_HW_ATTR_OFST_TX_CMPLT_REQ 12 #define TX_HW_RESULT_QUEUE_LEN 16 #define TX_HW_RESULT_QUEUE_LEN_MASK 0xf #define WL1271_TX_ALIGN_TO 4 #define WL1271_TKIP_IV_SPACE 4 /* Used for management frames and dummy packets */ #define WL1271_TID_MGMT 7 struct wl127x_tx_mem { /* * Number of extra memory blocks to allocate for this packet * in addition to the number of blocks derived from the packet * length. */ u8 extra_blocks; /* * Total number of memory blocks allocated by the host for * this packet. Must be equal or greater than the actual * blocks number allocated by HW. */ u8 total_mem_blocks; } __packed; struct wl128x_tx_mem { /* * Total number of memory blocks allocated by the host for * this packet. */ u8 total_mem_blocks; /* * Number of extra bytes, at the end of the frame. the host * uses this padding to complete each frame to integer number * of SDIO blocks. */ u8 extra_bytes; } __packed; /* * On wl128x based devices, when TX packets are aggregated, each packet * size must be aligned to the SDIO block size. The maximum block size * is bounded by the type of the padded bytes field that is sent to the * FW. Currently the type is u8, so the maximum block size is 256 bytes. */ #define WL12XX_BUS_BLOCK_SIZE min(512u, \ (1u << (8 * sizeof(((struct wl128x_tx_mem *) 0)->extra_bytes)))) struct wl1271_tx_hw_descr { /* Length of packet in words, including descriptor+header+data */ __le16 length; union { struct wl127x_tx_mem wl127x_mem; struct wl128x_tx_mem wl128x_mem; } __packed; /* Device time (in us) when the packet arrived to the driver */ __le32 start_time; /* * Max delay in TUs until transmission. The last device time the * packet can be transmitted is: start_time + (1024 * life_time) */ __le16 life_time; /* Bitwise fields - see TX_ATTR... definitions above. */ __le16 tx_attr; /* Packet identifier used also in the Tx-Result. */ u8 id; /* The packet TID value (as User-Priority) */ u8 tid; /* host link ID (HLID) */ u8 hlid; u8 reserved; } __packed; enum wl1271_tx_hw_res_status { TX_SUCCESS = 0, TX_HW_ERROR = 1, TX_DISABLED = 2, TX_RETRY_EXCEEDED = 3, TX_TIMEOUT = 4, TX_KEY_NOT_FOUND = 5, TX_PEER_NOT_FOUND = 6, TX_SESSION_MISMATCH = 7, TX_LINK_NOT_VALID = 8, }; struct wl1271_tx_hw_res_descr { /* Packet Identifier - same value used in the Tx descriptor.*/ u8 id; /* The status of the transmission, indicating success or one of several possible reasons for failure. */ u8 status; /* Total air access duration including all retrys and overheads.*/ __le16 medium_usage; /* The time passed from host xfer to Tx-complete.*/ __le32 fw_handling_time; /* Total media delay (from 1st EDCA AIFS counter until TX Complete). */ __le32 medium_delay; /* LS-byte of last TKIP seq-num (saved per AC for recovery). */ u8 tx_security_sequence_number_lsb; /* Retry count - number of transmissions without successful ACK.*/ u8 ack_failures; /* The rate that succeeded getting ACK (Valid only if status=SUCCESS). */ u8 rate_class_index; /* for 4-byte alignment. */ u8 spare; } __packed; struct wl1271_tx_hw_res_if { __le32 tx_result_fw_counter; __le32 tx_result_host_counter; struct wl1271_tx_hw_res_descr tx_results_queue[TX_HW_RESULT_QUEUE_LEN]; } __packed; static inline int wl1271_tx_get_queue(int queue) { switch (queue) { case 0: return CONF_TX_AC_VO; case 1: return CONF_TX_AC_VI; case 2: return CONF_TX_AC_BE; case 3: return CONF_TX_AC_BK; default: return CONF_TX_AC_BE; } } static inline int wl1271_tx_get_mac80211_queue(int queue) { switch (queue) { case CONF_TX_AC_VO: return 0; case CONF_TX_AC_VI: return 1; case CONF_TX_AC_BE: return 2; case CONF_TX_AC_BK: return 3; default: return 2; } } static inline int wl1271_tx_total_queue_count(struct wl1271 *wl) { int i, count = 0; for (i = 0; i < NUM_TX_QUEUES; i++) count += wl->tx_queue_count[i]; return count; } void wl1271_tx_work(struct work_struct *work); void wl1271_tx_work_locked(struct wl1271 *wl); void wl1271_tx_complete(struct wl1271 *wl); void wl1271_tx_reset(struct wl1271 *wl, bool reset_tx_queues); void wl1271_tx_flush(struct wl1271 *wl); u8 wl1271_rate_to_idx(int rate, enum ieee80211_band band); u32 wl1271_tx_enabled_rates_get(struct wl1271 *wl, u32 rate_set); u32 wl1271_tx_min_rate_get(struct wl1271 *wl); u8 wl1271_tx_get_hlid(struct sk_buff *skb); void wl1271_tx_reset_link_queues(struct wl1271 *wl, u8 hlid); void wl1271_handle_tx_low_watermark(struct wl1271 *wl); #endif