iwl-trans.h

/******************************************************************************
 *
 * This file is provided under a dual BSD/GPLv2 license.  When using or
 * redistributing this file, you may do so under either license.
 *
 * GPL LICENSE SUMMARY
 *
 * Copyright(c) 2007 - 2011 Intel Corporation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of version 2 of the GNU General Public License as
 * published by the Free Software Foundation.
 *
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 * WITHOUT ANY WARRANTY; without even the implied warranty of
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 * General Public License for more details.
 *
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 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
 * USA
 *
 * The full GNU General Public License is included in this distribution
 * in the file called LICENSE.GPL.
 *
 * Contact Information:
 *  Intel Linux Wireless <ilw@linux.intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 * BSD LICENSE
 *
 * Copyright(c) 2005 - 2011 Intel Corporation. All rights reserved.
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 * modification, are permitted provided that the following conditions
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 *****************************************************************************/
#ifndef __iwl_trans_h__
#define __iwl_trans_h__

 /*This file includes the declaration that are exported from the transport
 * layer */

struct iwl_priv;
struct iwl_rxon_context;
struct iwl_host_cmd;
struct iwl_shared;

/**
 * struct iwl_trans_ops - transport specific operations
 * @alloc: allocates the meta data (not the queues themselves)
 * @request_irq: requests IRQ - will be called before the FW load in probe flow
 * @start_device: allocates and inits all the resources for the transport
 *                layer.
 * @prepare_card_hw: claim the ownership on the HW. Will be called during
 *                   probe.
 * @tx_start: starts and configures all the Tx fifo - usually done once the fw
 *           is alive.
 * @stop_device:stops the whole device (embedded CPU put to reset)
 * @rx_free: frees the rx memory
 * @tx_free: frees the tx memory
 * @send_cmd:send a host command
 * @send_cmd_pdu:send a host command: flags can be CMD_*
 * @get_tx_cmd: returns a pointer to a new Tx cmd for the upper layer use
 * @tx: send an skb
 * @txq_agg_setup: setup a tx queue for AMPDU - will be called once the HW is
 *                 ready and a successful ADDBA response has been received.
 * @txq_agg_disable: de-configure a Tx queue to send AMPDUs
 * @kick_nic: remove the RESET from the embedded CPU and let it run
 * @sync_irq: the upper layer will typically disable interrupt and call this
 *            handler. After this handler returns, it is guaranteed that all
 *            the ISR / tasklet etc... have finished running and the transport
 *            layer shall not pass any Rx.
 * @free: release all the ressource for the transport layer itself such as
 *        irq, tasklet etc...
 */
struct iwl_trans_ops {

	struct iwl_trans *(*alloc)(struct iwl_shared *shrd);
	int (*request_irq)(struct iwl_trans *iwl_trans);
	int (*start_device)(struct iwl_priv *priv);
	int (*prepare_card_hw)(struct iwl_priv *priv);
	void (*stop_device)(struct iwl_priv *priv);
	void (*tx_start)(struct iwl_priv *priv);
	void (*tx_free)(struct iwl_priv *priv);
	void (*rx_free)(struct iwl_priv *priv);

	int (*send_cmd)(struct iwl_priv *priv, struct iwl_host_cmd *cmd);

	int (*send_cmd_pdu)(struct iwl_priv *priv, u8 id, u32 flags, u16 len,
		     const void *data);
	struct iwl_tx_cmd * (*get_tx_cmd)(struct iwl_priv *priv, int txq_id);
	int (*tx)(struct iwl_priv *priv, struct sk_buff *skb,
		struct iwl_tx_cmd *tx_cmd, int txq_id, __le16 fc, bool ampdu,
		struct iwl_rxon_context *ctx);

	int (*txq_agg_disable)(struct iwl_priv *priv, u16 txq_id,
				  u16 ssn_idx, u8 tx_fifo);
	void (*txq_agg_setup)(struct iwl_priv *priv, int sta_id, int tid,
						int frame_limit);

	void (*kick_nic)(struct iwl_priv *priv);

	void (*sync_irq)(struct iwl_priv *priv);
	void (*free)(struct iwl_priv *priv);
};

/**
 * struct iwl_trans - transport common data
 * @ops - pointer to iwl_trans_ops
 * @shrd - pointer to iwl_shared which holds shared data from the upper layer
 */
struct iwl_trans {
	const struct iwl_trans_ops *ops;
	struct iwl_shared *shrd;

	/* pointer to trans specific struct */
	/*Ensure that this pointer will always be aligned to sizeof pointer */
	char trans_specific[0] __attribute__((__aligned__(sizeof(void *))));
};

static inline int iwl_trans_request_irq(struct iwl_trans *trans)
{
	return trans->ops->request_irq(trans);
}

static inline int iwl_trans_start_device(struct iwl_trans *trans)
{
	return trans->ops->start_device(priv(trans));
}

static inline int iwl_trans_prepare_card_hw(struct iwl_trans *trans)
{
	return trans->ops->prepare_card_hw(priv(trans));
}

static inline void iwl_trans_stop_device(struct iwl_trans *trans)
{
	trans->ops->stop_device(priv(trans));
}

static inline void iwl_trans_tx_start(struct iwl_trans *trans)
{
	trans->ops->tx_start(priv(trans));
}

static inline void iwl_trans_rx_free(struct iwl_trans *trans)
{
	trans->ops->rx_free(priv(trans));
}

static inline void iwl_trans_tx_free(struct iwl_trans *trans)
{
	trans->ops->tx_free(priv(trans));
}

static inline int iwl_trans_send_cmd(struct iwl_trans *trans,
				struct iwl_host_cmd *cmd)
{
	return trans->ops->send_cmd(priv(trans), cmd);
}

static inline int iwl_trans_send_cmd_pdu(struct iwl_trans *trans, u8 id,
					u32 flags, u16 len, const void *data)
{
	return trans->ops->send_cmd_pdu(priv(trans), id, flags, len, data);
}

static inline struct iwl_tx_cmd *iwl_trans_get_tx_cmd(struct iwl_trans *trans,
					int txq_id)
{
	return trans->ops->get_tx_cmd(priv(trans), txq_id);
}

static inline int iwl_trans_tx(struct iwl_trans *trans, struct sk_buff *skb,
		struct iwl_tx_cmd *tx_cmd, int txq_id, __le16 fc, bool ampdu,
		struct iwl_rxon_context *ctx)
{
	return trans->ops->tx(priv(trans), skb, tx_cmd, txq_id, fc, ampdu, ctx);
}

static inline int iwl_trans_txq_agg_disable(struct iwl_trans *trans, u16 txq_id,
			  u16 ssn_idx, u8 tx_fifo)
{
	return trans->ops->txq_agg_disable(priv(trans), txq_id,
					   ssn_idx, tx_fifo);
}

static inline void iwl_trans_txq_agg_setup(struct iwl_trans *trans, int sta_id,
						int tid, int frame_limit)
{
	trans->ops->txq_agg_setup(priv(trans), sta_id, tid, frame_limit);
}

static inline void iwl_trans_kick_nic(struct iwl_trans *trans)
{
	trans->ops->kick_nic(priv(trans));
}

static inline void iwl_trans_sync_irq(struct iwl_trans *trans)
{
	trans->ops->sync_irq(priv(trans));
}

static inline void iwl_trans_free(struct iwl_trans *trans)
{
	trans->ops->free(priv(trans));
}

/*****************************************************
* Transport layers implementations
******************************************************/
extern const struct iwl_trans_ops trans_ops_pcie;

/*TODO: this functions should NOT be exported from trans module - export it
 * until the reclaim flow will be brought to the transport module too */

struct iwl_tx_queue;
void iwlagn_txq_inval_byte_cnt_tbl(struct iwl_priv *priv,
					  struct iwl_tx_queue *txq);

#endif /* __iwl_trans_h__ */