/******************************************************************************
 *
 * 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 - 2014 Intel Corporation. All rights reserved.
 * Copyright(c) 2015 - 2017 Intel Deutschland GmbH
 * Copyright(c) 2018 - 2019 Intel Corporation
 *
 * 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.
 *
 * 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.
 *
 * The full GNU General Public License is included in this distribution
 * in the file called COPYING.
 *
 * Contact Information:
 *  Intel Linux Wireless <linuxwifi@intel.com>
 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
 *
 * BSD LICENSE
 *
 * Copyright(c) 2005 - 2014 Intel Corporation. All rights reserved.
 * Copyright(c) 2015 - 2017 Intel Deutschland GmbH
 * Copyright(c) 2018 - 2019 Intel Corporation
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *  * Neither the name Intel Corporation nor the names of its
 *    contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 *****************************************************************************/
#ifndef __iwl_xvt_h__
#define __iwl_xvt_h__

#include <linux/spinlock.h>
#include <linux/if_ether.h>
#include "iwl-drv.h"
#include "iwl-trans.h"
#include "iwl-op-mode.h"
#include "fw/img.h"
#include "iwl-config.h"
#include "fw-api.h"
#include "fw/notif-wait.h"
#include "constants.h"
#include "fw/runtime.h"

enum iwl_xvt_state {
	IWL_XVT_STATE_UNINITIALIZED = 0,
	IWL_XVT_STATE_NO_FW,
	IWL_XVT_STATE_INIT_STARTED,
	IWL_XVT_STATE_OPERATIONAL,
};

#define IWL_XVT_LOAD_MASK_INIT BIT(0)
#define IWL_XVT_LOAD_MASK_RUNTIME BIT(1)

#define NUM_OF_LMACS	(2)
#define IWL_XVT_DBG_FLAGS_NO_DEFAULT_TXQ (BIT(2))
#define IWL_XVT_MAX_PAYLOADS_AMOUNT (16)

#define IWL_MAX_BAID 32
#define IWL_XVT_INVALID_STA 0xFF

/**
 * tx_meta_data - Holds data and member needed for tx
 * @tx_mod_thread: thread dedicated for tx traffic
 * @mod_tx_wq: send packets queue
 * @tx_task_operating: whether tx is active
 * @queue: FW queue ID for TX_CMD
 * @tx_counter: counts number of sent packets
 * @tot_tx: total number of packets required to sent
 * @mod_tx_done_wq: queue to wait on until all packets are sent and received
 * @txq_full: set to true when mod_tx_wq is full
 * @seq_num: sequence number of qos frames (per-tid)
 */
struct tx_meta_data {
	struct task_struct *tx_mod_thread;
	wait_queue_head_t mod_tx_wq;
	bool tx_task_operating;
	int queue;
	u64 tx_counter;
	u32 tot_tx;
	wait_queue_head_t mod_tx_done_wq;
	bool txq_full;
	u16 seq_num[IWL_MAX_TID_COUNT];
};

/*
 * struct iwl_xvt_reorder_statistics - reorder buffer statistics
 * @dropped: number of frames dropped (e.g. too old)
 * @released: total number of frames released (either in-order or
 *	out of order (after passing the reorder buffer)
 * @skipped: number of frames skipped the reorder buffer (in-order)
 * @reordered: number of frames gone through the reorder buffer (unordered)
 */
struct iwl_xvt_reorder_statistics {
	u32 dropped;
	u32 released;
	u32 skipped;
	u32 reordered;
};

/**
 * struct iwl_xvt_reorder_buffer - per ra/tid/queue reorder buffer
 * @head_sn: reorder window head sn
 * @num_stored: number of mpdus stored in the buffer
 * @buf_size: the reorder buffer size as set by the last addba request
 * @sta_id: sta id of this reorder buffer
 * @tid: tid of this reorder buffer
 * @queue: queue of this reorder buffer
 * @last_amsdu: track last ASMDU SN for duplication detection
 * @last_sub_index: track ASMDU sub frame index for duplication detection
 * @entries: number of pending frames (for each index)
 * @lock: protect reorder buffer internal state
 * @stats: reorder buffer statistics
 */
struct iwl_xvt_reorder_buffer {
	u16 head_sn;
	u16 num_stored;
	u8 buf_size;
	u8 sta_id;
	u8 tid;
	int queue;
	u16 last_amsdu;
	u8 last_sub_index;

	/*
	 * we don't care about the actual frames, only their count.
	 * avoid messing with reorder timer for that reason as well
	 */
	u16 entries[IEEE80211_MAX_AMPDU_BUF_HT];

	spinlock_t lock; /* protect reorder buffer internal state */
	struct iwl_xvt_reorder_statistics stats;
};

/**
 * tx_queue_data - Holds tx data per tx queue
 * @tx_wq: TX sw queue
 * @tx_counter: Number of packets that were sent from this queue. Counts TX_RSP
 * @txq_full: Set to true when tx_wq is full
 * @allocated_queue: Whether queue is allocated
 */
struct tx_queue_data {
	wait_queue_head_t tx_wq;
	u64 tx_counter;
	bool txq_full;
	bool allocated_queue;
};

/**
 * tx_payload - Holds tx payload
 * @length: Payload length in bytes
 * @payload: Payload buffer
 */
struct tx_payload {
	u16 length;
	u8 payload[];
};

/**
 * iwl_sw_stack_config - Holds active SW stack config as set from user space
 * @load_mask: Which FW are to be loaded during SW stack up
 * @iwl_phy_cfg_cmd: Which calibrations should be done
 */
struct iwl_sw_stack_config {
	u32 load_mask;
	u32 calib_override_mask;
	u32 fw_dbg_flags;
	struct iwl_phy_cfg_cmd fw_calib_cmd_cfg[IWL_UCODE_TYPE_MAX];
};

/* Note: This structure is read from the device with IO accesses,
 * and the reading already does the endian conversion. As it is
 * read with u32-sized accesses, any members with a different size
 * need to be ordered correctly though!
 */
struct iwl_error_event_table_v1 {
	u32 valid;		/* (nonzero) valid, (0) log is empty */
	u32 error_id;		/* type of error */
	u32 pc;			/* program counter */
	u32 blink1;		/* branch link */
	u32 blink2;		/* branch link */
	u32 ilink1;		/* interrupt link */
	u32 ilink2;		/* interrupt link */
	u32 data1;		/* error-specific data */
	u32 data2;		/* error-specific data */
	u32 data3;		/* error-specific data */
	u32 bcon_time;		/* beacon timer */
	u32 tsf_low;		/* network timestamp function timer */
	u32 tsf_hi;		/* network timestamp function timer */
	u32 gp1;		/* GP1 timer register */
	u32 gp2;		/* GP2 timer register */
	u32 gp3;		/* GP3 timer register */
	u32 ucode_ver;		/* uCode version */
	u32 hw_ver;		/* HW Silicon version */
	u32 brd_ver;		/* HW board version */
	u32 log_pc;		/* log program counter */
	u32 frame_ptr;		/* frame pointer */
	u32 stack_ptr;		/* stack pointer */
	u32 hcmd;		/* last host command header */
	u32 isr0;		/* isr status register LMPM_NIC_ISR0:
				 * rxtx_flag
				 */
	u32 isr1;		/* isr status register LMPM_NIC_ISR1:
				 * host_flag
				 */
	u32 isr2;		/* isr status register LMPM_NIC_ISR2:
				 * enc_flag
				 */
	u32 isr3;		/* isr status register LMPM_NIC_ISR3:
				 * time_flag
				 */
	u32 isr4;		/* isr status register LMPM_NIC_ISR4:
				 * wico interrupt
				 */
	u32 isr_pref;		/* isr status register LMPM_NIC_PREF_STAT */
	u32 wait_event;		/* wait event() caller address */
	u32 l2p_control;	/* L2pControlField */
	u32 l2p_duration;	/* L2pDurationField */
	u32 l2p_mhvalid;	/* L2pMhValidBits */
	u32 l2p_addr_match;	/* L2pAddrMatchStat */
	u32 lmpm_pmg_sel;	/* indicate which clocks are turned on
				 * (LMPM_PMG_SEL)
				 */
	u32 u_timestamp;	/* indicate when the date and time of the
				 * compilation
				 */
	u32 flow_handler;	/* FH read/write pointers, RX credit */
} __packed;

/* Note: This structure is read from the device with IO accesses,
 * and the reading already does the endian conversion. As it is
 * read with u32-sized accesses, any members with a different size
 * need to be ordered correctly though!
 */
struct iwl_error_event_table_v2 {
	u32 valid;		/* (nonzero) valid, (0) log is empty */
	u32 error_id;		/* type of error */
	u32 trm_hw_status0;	/* TRM HW status */
	u32 trm_hw_status1;	/* TRM HW status */
	u32 blink2;		/* branch link */
	u32 ilink1;		/* interrupt link */
	u32 ilink2;		/* interrupt link */
	u32 data1;		/* error-specific data */
	u32 data2;		/* error-specific data */
	u32 data3;		/* error-specific data */
	u32 bcon_time;		/* beacon timer */
	u32 tsf_low;		/* network timestamp function timer */
	u32 tsf_hi;		/* network timestamp function timer */
	u32 gp1;		/* GP1 timer register */
	u32 gp2;		/* GP2 timer register */
	u32 fw_rev_type;	/* firmware revision type */
	u32 major;		/* uCode version major */
	u32 minor;		/* uCode version minor */
	u32 hw_ver;		/* HW Silicon version */
	u32 brd_ver;		/* HW board version */
	u32 log_pc;		/* log program counter */
	u32 frame_ptr;		/* frame pointer */
	u32 stack_ptr;		/* stack pointer */
	u32 hcmd;		/* last host command header */
	u32 isr0;		/* isr status register LMPM_NIC_ISR0:
				 * rxtx_flag
				 */
	u32 isr1;		/* isr status register LMPM_NIC_ISR1:
				 * host_flag
				 */
	u32 isr2;		/* isr status register LMPM_NIC_ISR2:
				 * enc_flag
				 */
	u32 isr3;		/* isr status register LMPM_NIC_ISR3:
				 * time_flag
				 */
	u32 isr4;		/* isr status register LMPM_NIC_ISR4:
				 * wico interrupt
				 */
	u32 last_cmd_id;	/* last HCMD id handled by the firmware */
	u32 wait_event;		/* wait event() caller address */
	u32 l2p_control;	/* L2pControlField */
	u32 l2p_duration;	/* L2pDurationField */
	u32 l2p_mhvalid;	/* L2pMhValidBits */
	u32 l2p_addr_match;	/* L2pAddrMatchStat */
	u32 lmpm_pmg_sel;	/* indicate which clocks are turned on
				 * (LMPM_PMG_SEL)
				 */
	u32 u_timestamp;	/* indicate when the date and time of the
				 * compilation
				 */
	u32 flow_handler;	/* FH read/write pointers, RX credit */
} __packed /* LOG_ERROR_TABLE_API_S_VER_3 */;

/* UMAC error struct - relevant starting from family 8000 chip.
 * Note: This structure is read from the device with IO accesses,
 * and the reading already does the endian conversion. As it is
 * read with u32-sized accesses, any members with a different size
 * need to be ordered correctly though!
 */
struct iwl_umac_error_event_table {
	u32 valid;		/* (nonzero) valid, (0) log is empty */
	u32 error_id;		/* type of error */
	u32 blink1;		/* branch link */
	u32 blink2;		/* branch link */
	u32 ilink1;		/* interrupt link */
	u32 ilink2;		/* interrupt link */
	u32 data1;		/* error-specific data */
	u32 data2;		/* error-specific data */
	u32 data3;		/* error-specific data */
	u32 umac_major;
	u32 umac_minor;
	u32 frame_pointer;	/* core register 27*/
	u32 stack_pointer;	/* core register 28 */
	u32 cmd_header;		/* latest host cmd sent to UMAC */
	u32 nic_isr_pref;	/* ISR status register */
} __packed;

/**
 * struct iwl_xvt_skb_info - driver data per skb
 * @dev_cmd: a pointer to the iwl_dev_cmd associated with this skb
 * @trans: transport data
 */
struct iwl_xvt_skb_info {
	struct iwl_device_cmd *dev_cmd;
	void *trans[2];
};

/**
 * struct iwl_xvt - the xvt op_mode
 *
 * @trans: pointer to the transport layer
 * @cfg: pointer to the driver's configuration
 * @fw: a pointer to the fw object
 * @dev: pointer to struct device for printing purposes
 */
struct iwl_xvt {
	struct iwl_trans *trans;
	const struct iwl_cfg *cfg;
	struct iwl_phy_db *phy_db;
	const struct iwl_fw *fw;
	struct device *dev;
	struct dentry *debugfs_dir;

	struct mutex mutex;	/* Protects access to xVT struct */
	spinlock_t notif_lock;;	/* Protects notifications processing */
	enum iwl_xvt_state state;
	bool fw_error;

	struct iwl_notif_wait_data notif_wait;

	bool fw_running;
	bool support_umac_log;

	struct iwl_sw_stack_config sw_stack_cfg;
	bool rx_hdr_enabled;

	bool apmg_pd_en;
	/* DMA buffer information */
	u32 dma_buffer_size;
	u8 *dma_cpu_addr;
	dma_addr_t dma_addr;

	struct iwl_fw_runtime fwrt;

	bool is_nvm_mac_override;
	u8 nvm_hw_addr[ETH_ALEN];
	u8 nvm_mac_addr[ETH_ALEN];

	struct tx_meta_data tx_meta_data[NUM_OF_LMACS];

	struct iwl_xvt_reorder_buffer reorder_bufs[IWL_MAX_BAID];

	/* members for enhanced tx command */
	struct tx_payload *payloads[IWL_XVT_MAX_PAYLOADS_AMOUNT];
	struct task_struct *tx_task;
	bool is_enhanced_tx;
	bool send_tx_resp;
	bool send_rx_mpdu;
	u64 num_of_tx_resp;
	u64 expected_tx_amount;
	wait_queue_head_t tx_done_wq;
	struct tx_queue_data queue_data[IWL_MAX_HW_QUEUES];
};

#define IWL_OP_MODE_GET_XVT(_op_mode) \
	((struct iwl_xvt *)((_op_mode)->op_mode_specific))

/******************
 * XVT Methods
 ******************/

/* Host Commands */
int __must_check iwl_xvt_send_cmd(struct iwl_xvt *xvt,
				  struct iwl_host_cmd *cmd);
int __must_check iwl_xvt_send_cmd_pdu(struct iwl_xvt *xvt, u32 id,
				      u32 flags, u16 len, const void *data);

/* Utils */
void iwl_xvt_get_nic_error_log_v1(struct iwl_xvt *xvt,
				  struct iwl_error_event_table_v1 *table);
void iwl_xvt_dump_nic_error_log_v1(struct iwl_xvt *xvt,
				   struct iwl_error_event_table_v1 *table);
void iwl_xvt_get_nic_error_log_v2(struct iwl_xvt *xvt,
				  struct iwl_error_event_table_v2 *table);
void iwl_xvt_dump_nic_error_log_v2(struct iwl_xvt *xvt,
				   struct iwl_error_event_table_v2 *table);
void iwl_xvt_get_umac_error_log(struct iwl_xvt *xvt,
				struct iwl_umac_error_event_table *table);
void iwl_xvt_dump_umac_error_log(struct iwl_xvt *xvt,
				 struct iwl_umac_error_event_table *table);

/* User interface */
int iwl_xvt_user_cmd_execute(struct iwl_testmode *testmode, u32 cmd,
			     struct iwl_tm_data *data_in,
			     struct iwl_tm_data *data_out, bool *supported_cmd);

/* FW */
int iwl_xvt_run_fw(struct iwl_xvt *xvt, u32 ucode_type);

/* NVM */
int iwl_xvt_nvm_init(struct iwl_xvt *xvt);

/* RX */
bool iwl_xvt_reorder(struct iwl_xvt *xvt, struct iwl_rx_packet *pkt);
void iwl_xvt_rx_frame_release(struct iwl_xvt *xvt, struct iwl_rx_packet *pkt);
void iwl_xvt_destroy_reorder_buffer(struct iwl_xvt *xvt,
				    struct iwl_xvt_reorder_buffer *buf);

/* Based on mvm function: iwl_mvm_has_new_tx_api */
static inline bool iwl_xvt_is_unified_fw(struct iwl_xvt *xvt)
{
	/* TODO - replace with TLV once defined */
	return xvt->trans->cfg->device_family >= IWL_DEVICE_FAMILY_22000;
}

static inline bool iwl_xvt_is_cdb_supported(struct iwl_xvt *xvt)
{
	/*
	 * TODO:
	 * The issue of how to determine CDB APIs and usage is still not fully
	 * defined.
	 * There is a compilation for CDB and non-CDB FW, but there may
	 * be also runtime check.
	 * For now there is a TLV for checking compilation mode, but a
	 * runtime check will also have to be here - once defined.
	 */
	return fw_has_capa(&xvt->fw->ucode_capa,
			   IWL_UCODE_TLV_CAPA_CDB_SUPPORT);
}

static inline struct agg_tx_status*
iwl_xvt_get_agg_status(struct iwl_xvt *xvt, struct iwl_mvm_tx_resp *tx_resp)
{
	if (iwl_xvt_is_unified_fw(xvt))
		return &((struct iwl_mvm_tx_resp *)tx_resp)->status;
	else
		return ((struct iwl_mvm_tx_resp_v3 *)tx_resp)->status;
}

static inline u32 iwl_xvt_get_scd_ssn(struct iwl_xvt *xvt,
				      struct iwl_mvm_tx_resp *tx_resp)
{
	return le32_to_cpup((__le32 *)iwl_xvt_get_agg_status(xvt, tx_resp) +
			    tx_resp->frame_count) & 0xfff;
}

static inline bool iwl_xvt_has_default_txq(struct iwl_xvt *xvt)
{
	return !(xvt->sw_stack_cfg.fw_dbg_flags &
		 IWL_XVT_DBG_FLAGS_NO_DEFAULT_TXQ);
}

void iwl_xvt_free_tx_queue(struct iwl_xvt *xvt, u8 lmac_id);

int iwl_xvt_allocate_tx_queue(struct iwl_xvt *xvt, u8 sta_id,
			      u8 lmac_id);

void iwl_xvt_txq_disable(struct iwl_xvt *xvt);

/* XVT debugfs */
#ifdef CPTCFG_IWLWIFI_DEBUGFS
int iwl_xvt_dbgfs_register(struct iwl_xvt *xvt, struct dentry *dbgfs_dir);
#else
static inline int iwl_xvt_dbgfs_register(struct iwl_xvt *xvt,
					 struct dentry *dbgfs_dir)
{
	return 0;
}
#endif /* CPTCFG_IWLWIFI_DEBUGFS */

#endif
