/*-
 * Copyright (c) 2010 Chelsio Communications, Inc.
 * All rights reserved.
 * Written by: Navdeep Parhar <np@FreeBSD.org>
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
 *
 * $FreeBSD$
 *
 */

#ifndef __T4_OFFLOAD_H__
#define __T4_OFFLOAD_H__

#define INIT_ULPTX_WRH(w, wrlen, atomic, tid) do { \
	(w)->wr_hi = htonl(V_FW_WR_OP(FW_ULPTX_WR) | V_FW_WR_ATOMIC(atomic)); \
	(w)->wr_mid = htonl(V_FW_WR_LEN16(DIV_ROUND_UP(wrlen, 16)) | \
			       V_FW_WR_FLOWID(tid)); \
	(w)->wr_lo = cpu_to_be64(0); \
} while (0)

#define INIT_ULPTX_WR(w, wrlen, atomic, tid) \
    INIT_ULPTX_WRH(&((w)->wr), wrlen, atomic, tid)

#define INIT_TP_WR(w, tid) do { \
	(w)->wr.wr_hi = htonl(V_FW_WR_OP(FW_TP_WR) | \
                              V_FW_WR_IMMDLEN(sizeof(*w) - sizeof(w->wr))); \
	(w)->wr.wr_mid = htonl(V_FW_WR_LEN16(DIV_ROUND_UP(sizeof(*w), 16)) | \
                               V_FW_WR_FLOWID(tid)); \
	(w)->wr.wr_lo = cpu_to_be64(0); \
} while (0)

#define INIT_TP_WR_MIT_CPL(w, cpl, tid) do { \
	INIT_TP_WR(w, tid); \
	OPCODE_TID(w) = htonl(MK_OPCODE_TID(cpl, tid)); \
} while (0)

TAILQ_HEAD(stid_head, stid_region);
struct listen_ctx;

struct stid_region {
	TAILQ_ENTRY(stid_region) link;
	u_int used;	/* # of stids used by this region */
	u_int free;	/* # of contiguous stids free right after this region */
};

/*
 * Max # of ATIDs.  The absolute HW max is 16K but we keep it lower.
 */
#define MAX_ATIDS 8192U

union aopen_entry {
	void *data;
	union aopen_entry *next;
};

/*
 * Holds the size, base address, free list start, etc of the TID, server TID,
 * and active-open TID tables.  The tables themselves are allocated dynamically.
 */
struct tid_info {
	void **tid_tab;
	u_int ntids;
	u_int tids_in_use;

	struct mtx stid_lock __aligned(CACHE_LINE_SIZE);
	struct listen_ctx **stid_tab;
	u_int nstids;
	u_int stid_base;
	u_int stids_in_use;
	u_int nstids_free_head;	/* # of available stids at the beginning */
	struct stid_head stids;

	struct mtx atid_lock __aligned(CACHE_LINE_SIZE);
	union aopen_entry *atid_tab;
	u_int natids;
	union aopen_entry *afree;
	u_int atids_in_use;

	struct mtx ftid_lock __aligned(CACHE_LINE_SIZE);
	struct filter_entry *ftid_tab;
	u_int nftids;
	u_int ftid_base;
	u_int ftids_in_use;

	struct mtx etid_lock __aligned(CACHE_LINE_SIZE);
	struct etid_entry *etid_tab;
	u_int netids;
	u_int etid_base;
};

struct t4_range {
	u_int start;
	u_int size;
};

struct t4_virt_res {                      /* virtualized HW resources */
	struct t4_range ddp;
	struct t4_range iscsi;
	struct t4_range stag;
	struct t4_range rq;
	struct t4_range pbl;
	struct t4_range qp;
	struct t4_range cq;
	struct t4_range ocq;
	struct t4_range l2t;
};

enum {
	ULD_TOM = 0,
	ULD_IWARP,
	ULD_ISCSI,
	ULD_MAX = ULD_ISCSI
};

struct adapter;
struct port_info;
struct uld_info {
	SLIST_ENTRY(uld_info) link;
	int refcount;
	int uld_id;
	int (*activate)(struct adapter *);
	int (*deactivate)(struct adapter *);
};

struct tom_tunables {
	int sndbuf;
	int ddp;
	int rx_coalesce;
	int tx_align;
};

#ifdef TCP_OFFLOAD
int t4_register_uld(struct uld_info *);
int t4_unregister_uld(struct uld_info *);
int t4_activate_uld(struct adapter *, int);
int t4_deactivate_uld(struct adapter *, int);
void t4_iscsi_init(struct adapter *, u_int, const u_int *);
int uld_active(struct adapter *, int);
#endif
#endif