forked from Minki/linux
e9eb8cbe77
Add tx_spare_blocks member to the wl1271 struct for more generic configuration of the amount of spare TX blocks that should be used. The default value is 1. In case GEM cipher is used by the STA, we need 2 spare TX blocks instead of just 1. Signed-off-by: Guy Eilam <guy@wizery.com> Acked-by: Arik Nemtsov <arik@wizery.com> Signed-off-by: Luciano Coelho <coelho@ti.com>
219 lines
6.2 KiB
C
219 lines
6.2 KiB
C
/*
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* This file is part of wl1271
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*
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* Copyright (C) 1998-2009 Texas Instruments. All rights reserved.
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* Copyright (C) 2009 Nokia Corporation
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*
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* Contact: Luciano Coelho <luciano.coelho@nokia.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*
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*/
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#ifndef __TX_H__
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#define __TX_H__
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#define TX_HW_BLOCK_SPARE_DEFAULT 1
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#define TX_HW_BLOCK_SIZE 252
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#define TX_HW_MGMT_PKT_LIFETIME_TU 2000
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#define TX_HW_AP_MODE_PKT_LIFETIME_TU 8000
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#define TX_HW_ATTR_SAVE_RETRIES BIT(0)
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#define TX_HW_ATTR_HEADER_PAD BIT(1)
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#define TX_HW_ATTR_SESSION_COUNTER (BIT(2) | BIT(3) | BIT(4))
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#define TX_HW_ATTR_RATE_POLICY (BIT(5) | BIT(6) | BIT(7) | \
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BIT(8) | BIT(9))
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#define TX_HW_ATTR_LAST_WORD_PAD (BIT(10) | BIT(11))
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#define TX_HW_ATTR_TX_CMPLT_REQ BIT(12)
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#define TX_HW_ATTR_TX_DUMMY_REQ BIT(13)
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#define TX_HW_ATTR_OFST_SAVE_RETRIES 0
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#define TX_HW_ATTR_OFST_HEADER_PAD 1
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#define TX_HW_ATTR_OFST_SESSION_COUNTER 2
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#define TX_HW_ATTR_OFST_RATE_POLICY 5
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#define TX_HW_ATTR_OFST_LAST_WORD_PAD 10
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#define TX_HW_ATTR_OFST_TX_CMPLT_REQ 12
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#define TX_HW_RESULT_QUEUE_LEN 16
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#define TX_HW_RESULT_QUEUE_LEN_MASK 0xf
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#define WL1271_TX_ALIGN_TO 4
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#define WL1271_TKIP_IV_SPACE 4
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/* Used for management frames and dummy packets */
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#define WL1271_TID_MGMT 7
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struct wl127x_tx_mem {
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/*
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* Number of extra memory blocks to allocate for this packet
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* in addition to the number of blocks derived from the packet
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* length.
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*/
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u8 extra_blocks;
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/*
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* Total number of memory blocks allocated by the host for
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* this packet. Must be equal or greater than the actual
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* blocks number allocated by HW.
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*/
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u8 total_mem_blocks;
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} __packed;
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struct wl128x_tx_mem {
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/*
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* Total number of memory blocks allocated by the host for
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* this packet.
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*/
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u8 total_mem_blocks;
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/*
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* Number of extra bytes, at the end of the frame. the host
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* uses this padding to complete each frame to integer number
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* of SDIO blocks.
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*/
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u8 extra_bytes;
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} __packed;
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/*
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* On wl128x based devices, when TX packets are aggregated, each packet
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* size must be aligned to the SDIO block size. The maximum block size
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* is bounded by the type of the padded bytes field that is sent to the
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* FW. Currently the type is u8, so the maximum block size is 256 bytes.
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*/
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#define WL12XX_BUS_BLOCK_SIZE min(512u, \
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(1u << (8 * sizeof(((struct wl128x_tx_mem *) 0)->extra_bytes))))
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struct wl1271_tx_hw_descr {
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/* Length of packet in words, including descriptor+header+data */
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__le16 length;
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union {
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struct wl127x_tx_mem wl127x_mem;
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struct wl128x_tx_mem wl128x_mem;
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} __packed;
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/* Device time (in us) when the packet arrived to the driver */
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__le32 start_time;
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/*
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* Max delay in TUs until transmission. The last device time the
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* packet can be transmitted is: start_time + (1024 * life_time)
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*/
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__le16 life_time;
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/* Bitwise fields - see TX_ATTR... definitions above. */
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__le16 tx_attr;
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/* Packet identifier used also in the Tx-Result. */
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u8 id;
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/* The packet TID value (as User-Priority) */
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u8 tid;
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/* host link ID (HLID) */
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u8 hlid;
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u8 reserved;
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} __packed;
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enum wl1271_tx_hw_res_status {
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TX_SUCCESS = 0,
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TX_HW_ERROR = 1,
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TX_DISABLED = 2,
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TX_RETRY_EXCEEDED = 3,
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TX_TIMEOUT = 4,
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TX_KEY_NOT_FOUND = 5,
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TX_PEER_NOT_FOUND = 6,
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TX_SESSION_MISMATCH = 7,
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TX_LINK_NOT_VALID = 8,
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};
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struct wl1271_tx_hw_res_descr {
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/* Packet Identifier - same value used in the Tx descriptor.*/
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u8 id;
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/* The status of the transmission, indicating success or one of
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several possible reasons for failure. */
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u8 status;
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/* Total air access duration including all retrys and overheads.*/
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__le16 medium_usage;
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/* The time passed from host xfer to Tx-complete.*/
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__le32 fw_handling_time;
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/* Total media delay
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(from 1st EDCA AIFS counter until TX Complete). */
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__le32 medium_delay;
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/* LS-byte of last TKIP seq-num (saved per AC for recovery). */
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u8 tx_security_sequence_number_lsb;
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/* Retry count - number of transmissions without successful ACK.*/
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u8 ack_failures;
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/* The rate that succeeded getting ACK
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(Valid only if status=SUCCESS). */
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u8 rate_class_index;
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/* for 4-byte alignment. */
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u8 spare;
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} __packed;
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struct wl1271_tx_hw_res_if {
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__le32 tx_result_fw_counter;
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__le32 tx_result_host_counter;
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struct wl1271_tx_hw_res_descr tx_results_queue[TX_HW_RESULT_QUEUE_LEN];
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} __packed;
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static inline int wl1271_tx_get_queue(int queue)
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{
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switch (queue) {
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case 0:
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return CONF_TX_AC_VO;
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case 1:
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return CONF_TX_AC_VI;
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case 2:
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return CONF_TX_AC_BE;
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case 3:
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return CONF_TX_AC_BK;
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default:
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return CONF_TX_AC_BE;
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}
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}
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static inline int wl1271_tx_get_mac80211_queue(int queue)
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{
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switch (queue) {
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case CONF_TX_AC_VO:
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return 0;
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case CONF_TX_AC_VI:
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return 1;
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case CONF_TX_AC_BE:
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return 2;
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case CONF_TX_AC_BK:
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return 3;
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default:
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return 2;
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}
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}
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static inline int wl1271_tx_total_queue_count(struct wl1271 *wl)
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{
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int i, count = 0;
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for (i = 0; i < NUM_TX_QUEUES; i++)
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count += wl->tx_queue_count[i];
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return count;
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}
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void wl1271_tx_work(struct work_struct *work);
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void wl1271_tx_work_locked(struct wl1271 *wl);
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void wl1271_tx_complete(struct wl1271 *wl);
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void wl1271_tx_reset(struct wl1271 *wl, bool reset_tx_queues);
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void wl1271_tx_flush(struct wl1271 *wl);
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u8 wl1271_rate_to_idx(int rate, enum ieee80211_band band);
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u32 wl1271_tx_enabled_rates_get(struct wl1271 *wl, u32 rate_set);
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u32 wl1271_tx_min_rate_get(struct wl1271 *wl);
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u8 wl12xx_tx_get_hlid_ap(struct wl1271 *wl, struct sk_buff *skb);
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void wl1271_tx_reset_link_queues(struct wl1271 *wl, u8 hlid);
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void wl1271_handle_tx_low_watermark(struct wl1271 *wl);
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#endif
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