f1a46384ad
Split tx_queue_count to count per-AC skb's queued, instead of relying on the skb-queue len. The skb queues used were only valid in STA-mode, as AP-mode uses per-link queues. This fixes a major regression in AP-mode, caused by the patch "wl12xx: implement Tx watermarks per AC". With that patch applied, we effectively had no regulation of Tx queues in AP-mode. Therefore a sustained high rate of Tx could cause exhaustion of the skb memory pool. Signed-off-by: Arik Nemtsov <arik@wizery.com> Signed-off-by: Luciano Coelho <coelho@ti.com>
223 lines
6.4 KiB
C
223 lines
6.4 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_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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/* The chipset reference driver states, that the "aid" value 1
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* is for infra-BSS, but is still always used */
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#define TX_HW_DEFAULT_AID 1
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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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union {
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/* STA - Identifier of the remote STA in IBSS, 1 in infra-BSS */
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u8 aid;
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/* AP - host link ID (HLID) */
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u8 hlid;
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} __packed;
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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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};
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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 wl1271_tx_get_hlid(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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