drivers/net/wireless/wl12xx/tx.h - maze/linux - Git at Google

 /*
  * This file is part of wl1271
  *
  * Copyright (C) 1998-2009 Texas Instruments. All rights reserved.
  * Copyright (C) 2009 Nokia Corporation
  *
  * Contact: Luciano Coelho <luciano.coelho@nokia.com>
  *
  * 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
 /* The chipset reference driver states, that the "aid" value 1
  * is for infra-BSS, but is still always used */
 #define TX_HW_DEFAULT_AID                1

 #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;
 	union {
 		/* STA - Identifier of the remote STA in IBSS, 1 in infra-BSS */
 		u8 aid;
 		/* AP - host link ID (HLID) */
 		u8 hlid;
 	} __packed;
 	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
 };

 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
	/*
	* This file is part of wl1271
	*
	* Copyright (C) 1998-2009 Texas Instruments. All rights reserved.
	* Copyright (C) 2009 Nokia Corporation
	*
	* Contact: Luciano Coelho <luciano.coelho@nokia.com>
	*
	* 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
	/* The chipset reference driver states, that the "aid" value 1
	* is for infra-BSS, but is still always used */
	#define TX_HW_DEFAULT_AID 1

	#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;
	union {
	/* STA - Identifier of the remote STA in IBSS, 1 in infra-BSS */
	u8 aid;
	/* AP - host link ID (HLID) */
	u8 hlid;
	} __packed;
	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
	};

	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