[SCSI] libcxgbi: common library for cxgb3i and cxgb4i

/*

 * libcxgbi.h: Chelsio common library for T3/T4 iSCSI driver.

 *

 * Copyright (c) 2010 Chelsio Communications, Inc.

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License as published by

 * the Free Software Foundation.

 *

 * Written by: Karen Xie (kxie@chelsio.com)

 * Written by: Rakesh Ranjan (rranjan@chelsio.com)

 */

#ifndef	__LIBCXGBI_H__

#define	__LIBCXGBI_H__

#include <linux/kernel.h>

#include <linux/errno.h>

#include <linux/types.h>

#include <linux/debugfs.h>

#include <linux/list.h>

#include <linux/netdevice.h>

#include <linux/if_vlan.h>

#include <linux/scatterlist.h>

#include <linux/skbuff.h>

#include <linux/vmalloc.h>

#include <scsi/scsi_device.h>

#include <scsi/libiscsi_tcp.h>

enum cxgbi_dbg_flag {

	CXGBI_DBG_ISCSI,

	CXGBI_DBG_DDP,

	CXGBI_DBG_TOE,

	CXGBI_DBG_SOCK,

	CXGBI_DBG_PDU_TX,

	CXGBI_DBG_PDU_RX,

	CXGBI_DBG_DEV,

};

#define log_debug(level, fmt, ...)	\

	do {	\

		if (dbg_level & (level)) \

			pr_info(fmt, ##__VA_ARGS__); \

	} while (0)

/* max. connections per adapter */

#define CXGBI_MAX_CONN		16384

/* always allocate rooms for AHS */

#define SKB_TX_ISCSI_PDU_HEADER_MAX	\

	(sizeof(struct iscsi_hdr) + ISCSI_MAX_AHS_SIZE)

#define	ISCSI_PDU_NONPAYLOAD_LEN	312 /* bhs(48) + ahs(256) + digest(8)*/

/*

 * align pdu size to multiple of 512 for better performance

 */

#define cxgbi_align_pdu_size(n) do { n = (n) & (~511); } while (0)

#define ULP2_MODE_ISCSI		2

#define ULP2_MAX_PKT_SIZE	16224

#define ULP2_MAX_PDU_PAYLOAD	\

	(ULP2_MAX_PKT_SIZE - ISCSI_PDU_NONPAYLOAD_LEN)

/*

 * For iscsi connections HW may inserts digest bytes into the pdu. Those digest

 * bytes are not sent by the host but are part of the TCP payload and therefore

 * consume TCP sequence space.

 */

static const unsigned int ulp2_extra_len[] = { 0, 4, 4, 8 };

static inline unsigned int cxgbi_ulp_extra_len(int submode)

{

	return ulp2_extra_len[submode & 3];

}

/*

 * struct pagepod_hdr, pagepod - pagepod format

 */

#define CPL_RX_DDP_STATUS_DDP_SHIFT	16 /* ddp'able */

#define CPL_RX_DDP_STATUS_PAD_SHIFT	19 /* pad error */

#define CPL_RX_DDP_STATUS_HCRC_SHIFT	20 /* hcrc error */

#define CPL_RX_DDP_STATUS_DCRC_SHIFT	21 /* dcrc error */

struct cxgbi_pagepod_hdr {

	u32 vld_tid;

	u32 pgsz_tag_clr;

	u32 max_offset;

	u32 page_offset;

	u64 rsvd;

};

#define PPOD_PAGES_MAX			4

struct cxgbi_pagepod {

	struct cxgbi_pagepod_hdr hdr;

	u64 addr[PPOD_PAGES_MAX + 1];

};

struct cxgbi_tag_format {

	unsigned char sw_bits;

	unsigned char rsvd_bits;

	unsigned char rsvd_shift;

	unsigned char filler[1];

	u32 rsvd_mask;

};

struct cxgbi_gather_list {

	unsigned int tag;

	unsigned int length;

	unsigned int offset;

	unsigned int nelem;

	struct page **pages;

	dma_addr_t phys_addr[0];

};

struct cxgbi_ddp_info {

	struct kref refcnt;

	struct cxgbi_device *cdev;

	struct pci_dev *pdev;

	unsigned int max_txsz;

	unsigned int max_rxsz;

	unsigned int llimit;

	unsigned int ulimit;

	unsigned int nppods;

	unsigned int idx_last;

	unsigned char idx_bits;

	unsigned char filler[3];

	unsigned int idx_mask;

	unsigned int rsvd_tag_mask;

	spinlock_t map_lock;

	struct cxgbi_gather_list **gl_map;

	struct sk_buff **gl_skb;

};

#define DDP_PGIDX_MAX		4

#define DDP_THRESHOLD		2048

#define PPOD_PAGES_SHIFT	2       /*  4 pages per pod */

#define PPOD_SIZE               sizeof(struct cxgbi_pagepod)  /*  64 */

#define PPOD_SIZE_SHIFT         6

#define ULPMEM_DSGL_MAX_NPPODS	16	/*  1024/PPOD_SIZE */

#define ULPMEM_IDATA_MAX_NPPODS	4	/*  256/PPOD_SIZE */

#define PCIE_MEMWIN_MAX_NPPODS	16	/*  1024/PPOD_SIZE */

#define PPOD_COLOR_SHIFT	0

#define PPOD_COLOR(x)		((x) << PPOD_COLOR_SHIFT)

#define PPOD_IDX_SHIFT          6

#define PPOD_IDX_MAX_SIZE       24

#define PPOD_TID_SHIFT		0

#define PPOD_TID(x)		((x) << PPOD_TID_SHIFT)

#define PPOD_TAG_SHIFT		6

#define PPOD_TAG(x)		((x) << PPOD_TAG_SHIFT)

#define PPOD_VALID_SHIFT	24

#define PPOD_VALID(x)		((x) << PPOD_VALID_SHIFT)

#define PPOD_VALID_FLAG		PPOD_VALID(1U)

#define W_TCB_ULP_TYPE          0

#define TCB_ULP_TYPE_SHIFT      0

#define TCB_ULP_TYPE_MASK       0xfULL

#define TCB_ULP_TYPE(x)         ((x) << TCB_ULP_TYPE_SHIFT)

#define W_TCB_ULP_RAW           0

#define TCB_ULP_RAW_SHIFT       4

#define TCB_ULP_RAW_MASK        0xffULL

#define TCB_ULP_RAW(x)          ((x) << TCB_ULP_RAW_SHIFT)

/*

 * sge_opaque_hdr -

 * Opaque version of structure the SGE stores at skb->head of TX_DATA packets

 * and for which we must reserve space.

 */

struct sge_opaque_hdr {

	void *dev;

	dma_addr_t addr[MAX_SKB_FRAGS + 1];

};

struct cxgbi_sock {

	struct cxgbi_device *cdev;

	int tid;

	int atid;

	unsigned long flags;

	unsigned int mtu;

	unsigned short rss_qid;

	unsigned short txq_idx;

	unsigned short advmss;

	unsigned int tx_chan;

	unsigned int rx_chan;

	unsigned int mss_idx;

	unsigned int smac_idx;

	unsigned char port_id;

	int wr_max_cred;

	int wr_cred;

	int wr_una_cred;

	unsigned char hcrc_len;

	unsigned char dcrc_len;

	void *l2t;

	struct sk_buff *wr_pending_head;

	struct sk_buff *wr_pending_tail;

	struct sk_buff *cpl_close;

	struct sk_buff *cpl_abort_req;

	struct sk_buff *cpl_abort_rpl;

	struct sk_buff *skb_ulp_lhdr;

	spinlock_t lock;

	struct kref refcnt;

	unsigned int state;

	struct sockaddr_in saddr;

	struct sockaddr_in daddr;

	struct dst_entry *dst;

	struct sk_buff_head receive_queue;

	struct sk_buff_head write_queue;

	struct timer_list retry_timer;

	int err;

	rwlock_t callback_lock;

	void *user_data;

	u32 rcv_nxt;

	u32 copied_seq;

	u32 rcv_wup;

	u32 snd_nxt;

	u32 snd_una;

	u32 write_seq;

};

/*

 * connection states

 */

enum cxgbi_sock_states{

	CTP_CLOSED,

	CTP_CONNECTING,

	CTP_ACTIVE_OPEN,

	CTP_ESTABLISHED,

	CTP_ACTIVE_CLOSE,

	CTP_PASSIVE_CLOSE,

	CTP_CLOSE_WAIT_1,

	CTP_CLOSE_WAIT_2,

	CTP_ABORTING,

};

/*

 * Connection flags -- many to track some close related events.

 */

enum cxgbi_sock_flags {

	CTPF_ABORT_RPL_RCVD,	/*received one ABORT_RPL_RSS message */

	CTPF_ABORT_REQ_RCVD,	/*received one ABORT_REQ_RSS message */

	CTPF_ABORT_RPL_PENDING,	/* expecting an abort reply */

	CTPF_TX_DATA_SENT,	/* already sent a TX_DATA WR */

	CTPF_ACTIVE_CLOSE_NEEDED,/* need to be closed */

	CTPF_HAS_ATID,		/* reserved atid */

	CTPF_HAS_TID,		/* reserved hw tid */

	CTPF_OFFLOAD_DOWN,	/* offload function off */

};

struct cxgbi_skb_rx_cb {

	__u32 ddigest;

	__u32 pdulen;

};

struct cxgbi_skb_tx_cb {

	void *l2t;

	struct sk_buff *wr_next;

};

enum cxgbi_skcb_flags {

	SKCBF_TX_NEED_HDR,	/* packet needs a header */

	SKCBF_RX_COALESCED,	/* received whole pdu */

	SKCBF_RX_HDR,		/* recieved pdu header */

	SKCBF_RX_DATA,		/* recieved pdu payload */

	SKCBF_RX_STATUS,	/* recieved ddp status */

	SKCBF_RX_DATA_DDPD,	/* pdu payload ddp'd */

	SKCBF_RX_HCRC_ERR,	/* header digest error */

	SKCBF_RX_DCRC_ERR,	/* data digest error */

	SKCBF_RX_PAD_ERR,	/* padding byte error */

};

struct cxgbi_skb_cb {

	unsigned char ulp_mode;

	unsigned long flags;

	unsigned int seq;

	union {

		struct cxgbi_skb_rx_cb rx;

		struct cxgbi_skb_tx_cb tx;

	};

};

#define CXGBI_SKB_CB(skb)	((struct cxgbi_skb_cb *)&((skb)->cb[0]))

#define cxgbi_skcb_flags(skb)		(CXGBI_SKB_CB(skb)->flags)

#define cxgbi_skcb_ulp_mode(skb)	(CXGBI_SKB_CB(skb)->ulp_mode)

#define cxgbi_skcb_tcp_seq(skb)		(CXGBI_SKB_CB(skb)->seq)

#define cxgbi_skcb_rx_ddigest(skb)	(CXGBI_SKB_CB(skb)->rx.ddigest)

#define cxgbi_skcb_rx_pdulen(skb)	(CXGBI_SKB_CB(skb)->rx.pdulen)

#define cxgbi_skcb_tx_wr_next(skb)	(CXGBI_SKB_CB(skb)->tx.wr_next)

static inline void cxgbi_skcb_set_flag(struct sk_buff *skb,

					enum cxgbi_skcb_flags flag)

{

	__set_bit(flag, &(cxgbi_skcb_flags(skb)));

}

static inline void cxgbi_skcb_clear_flag(struct sk_buff *skb,

					enum cxgbi_skcb_flags flag)

{

	__clear_bit(flag, &(cxgbi_skcb_flags(skb)));

}

static inline int cxgbi_skcb_test_flag(struct sk_buff *skb,

					enum cxgbi_skcb_flags flag)

{

	return test_bit(flag, &(cxgbi_skcb_flags(skb)));

}

static inline void cxgbi_sock_set_flag(struct cxgbi_sock *csk,

					enum cxgbi_sock_flags flag)

{

	__set_bit(flag, &csk->flags);

	log_debug(1 << CXGBI_DBG_SOCK,

		"csk 0x%p,%u,0x%lx, bit %d.\n",

		csk, csk->state, csk->flags, flag);

}

static inline void cxgbi_sock_clear_flag(struct cxgbi_sock *csk,

					enum cxgbi_sock_flags flag)

{

	__clear_bit(flag, &csk->flags);

	log_debug(1 << CXGBI_DBG_SOCK,

		"csk 0x%p,%u,0x%lx, bit %d.\n",

		csk, csk->state, csk->flags, flag);

}

static inline int cxgbi_sock_flag(struct cxgbi_sock *csk,

				enum cxgbi_sock_flags flag)

{

	if (csk == NULL)

		return 0;

	return test_bit(flag, &csk->flags);

}

static inline void cxgbi_sock_set_state(struct cxgbi_sock *csk, int state)

{

	log_debug(1 << CXGBI_DBG_SOCK,

		"csk 0x%p,%u,0x%lx, state -> %u.\n",

		csk, csk->state, csk->flags, state);

	csk->state = state;

}

static inline void cxgbi_sock_free(struct kref *kref)

{

	struct cxgbi_sock *csk = container_of(kref,

						struct cxgbi_sock,

						refcnt);

	if (csk) {

		log_debug(1 << CXGBI_DBG_SOCK,

			"free csk 0x%p, state %u, flags 0x%lx\n",

			csk, csk->state, csk->flags);

		kfree(csk);

	}

}

static inline void __cxgbi_sock_put(const char *fn, struct cxgbi_sock *csk)

{

	log_debug(1 << CXGBI_DBG_SOCK,

		"%s, put csk 0x%p, ref %u-1.\n",

		fn, csk, atomic_read(&csk->refcnt.refcount));

	kref_put(&csk->refcnt, cxgbi_sock_free);

}

#define cxgbi_sock_put(csk)	__cxgbi_sock_put(__func__, csk)

static inline void __cxgbi_sock_get(const char *fn, struct cxgbi_sock *csk)

{

	log_debug(1 << CXGBI_DBG_SOCK,

		"%s, get csk 0x%p, ref %u+1.\n",

		fn, csk, atomic_read(&csk->refcnt.refcount));

	kref_get(&csk->refcnt);

}

#define cxgbi_sock_get(csk)	__cxgbi_sock_get(__func__, csk)

static inline int cxgbi_sock_is_closing(struct cxgbi_sock *csk)

{

	return csk->state >= CTP_ACTIVE_CLOSE;

}

static inline int cxgbi_sock_is_established(struct cxgbi_sock *csk)

{

	return csk->state == CTP_ESTABLISHED;

}

static inline void cxgbi_sock_purge_write_queue(struct cxgbi_sock *csk)

{

	struct sk_buff *skb;

	while ((skb = __skb_dequeue(&csk->write_queue)))

		__kfree_skb(skb);

}

static inline unsigned int cxgbi_sock_compute_wscale(unsigned int win)

{

	unsigned int wscale = 0;

	while (wscale < 14 && (65535 << wscale) < win)

		wscale++;

	return wscale;

}

static inline struct sk_buff *alloc_cpl(int cpl_len, int dlen, gfp_t gfp)

{

	int wrlen = roundup(cpl_len, 16);

	struct sk_buff *skb = alloc_skb(wrlen + dlen, gfp);

	if (skb) {

		__skb_put(skb, wrlen);

		memset(skb->head, 0, wrlen + dlen);

	} else

		pr_info("alloc cpl skb %u+%u, OOM.\n", cpl_len, dlen);

	return skb;

}

/*

 * The number of WRs needed for an skb depends on the number of fragments

 * in the skb and whether it has any payload in its main body.  This maps the

 * length of the gather list represented by an skb into the # of necessary WRs.

 * The extra two fragments are for iscsi bhs and payload padding.

 */

#define SKB_WR_LIST_SIZE	 (MAX_SKB_FRAGS + 2)

static inline void cxgbi_sock_reset_wr_list(struct cxgbi_sock *csk)

{

	csk->wr_pending_head = csk->wr_pending_tail = NULL;

}

static inline void cxgbi_sock_enqueue_wr(struct cxgbi_sock *csk,

					  struct sk_buff *skb)

{

	cxgbi_skcb_tx_wr_next(skb) = NULL;

	/*

	 * We want to take an extra reference since both us and the driver

	 * need to free the packet before it's really freed. We know there's

	 * just one user currently so we use atomic_set rather than skb_get

	 * to avoid the atomic op.

	 */

	atomic_set(&skb->users, 2);

	if (!csk->wr_pending_head)

		csk->wr_pending_head = skb;

	else

		cxgbi_skcb_tx_wr_next(csk->wr_pending_tail) = skb;

	csk->wr_pending_tail = skb;

}

static inline int cxgbi_sock_count_pending_wrs(const struct cxgbi_sock *csk)

{

	int n = 0;

	const struct sk_buff *skb = csk->wr_pending_head;

	while (skb) {

		n += skb->csum;

		skb = cxgbi_skcb_tx_wr_next(skb);

	}

	return n;

}

static inline struct sk_buff *cxgbi_sock_peek_wr(const struct cxgbi_sock *csk)

{

	return csk->wr_pending_head;

}

static inline struct sk_buff *cxgbi_sock_dequeue_wr(struct cxgbi_sock *csk)

{

	struct sk_buff *skb = csk->wr_pending_head;

	if (likely(skb)) {

		csk->wr_pending_head = cxgbi_skcb_tx_wr_next(skb);

		cxgbi_skcb_tx_wr_next(skb) = NULL;

	}

	return skb;

}

void cxgbi_sock_check_wr_invariants(const struct cxgbi_sock *);

void cxgbi_sock_purge_wr_queue(struct cxgbi_sock *);

void cxgbi_sock_skb_entail(struct cxgbi_sock *, struct sk_buff *);

void cxgbi_sock_fail_act_open(struct cxgbi_sock *, int);

void cxgbi_sock_act_open_req_arp_failure(void *, struct sk_buff *);

void cxgbi_sock_closed(struct cxgbi_sock *);

void cxgbi_sock_established(struct cxgbi_sock *, unsigned int, unsigned int);

void cxgbi_sock_rcv_abort_rpl(struct cxgbi_sock *);

void cxgbi_sock_rcv_peer_close(struct cxgbi_sock *);

void cxgbi_sock_rcv_close_conn_rpl(struct cxgbi_sock *, u32);

void cxgbi_sock_rcv_wr_ack(struct cxgbi_sock *, unsigned int, unsigned int,

				int);

unsigned int cxgbi_sock_select_mss(struct cxgbi_sock *, unsigned int);

void cxgbi_sock_free_cpl_skbs(struct cxgbi_sock *);

struct cxgbi_hba {

	struct net_device *ndev;

	struct Scsi_Host *shost;

	struct cxgbi_device *cdev;

	__be32 ipv4addr;

	unsigned char port_id;

};

struct cxgbi_ports_map {

	unsigned int max_connect;

	unsigned int used;

	unsigned short sport_base;

	spinlock_t lock;

	unsigned int next;

	struct cxgbi_sock **port_csk;

};

#define CXGBI_FLAG_DEV_T3		0x1

#define CXGBI_FLAG_DEV_T4		0x2

#define CXGBI_FLAG_ADAPTER_RESET	0x4

#define CXGBI_FLAG_IPV4_SET		0x10

struct cxgbi_device {

	struct list_head list_head;

	unsigned int flags;

	struct net_device **ports;

	void *lldev;

	struct cxgbi_hba **hbas;

	const unsigned short *mtus;

	unsigned char nmtus;

	unsigned char nports;

	struct pci_dev *pdev;

	struct dentry *debugfs_root;

	struct iscsi_transport *itp;

	unsigned int pfvf;

	unsigned int snd_win;

	unsigned int rcv_win;

	unsigned int rx_credit_thres;

	unsigned int skb_tx_rsvd;

	unsigned int skb_rx_extra;	/* for msg coalesced mode */

	unsigned int tx_max_size;

	unsigned int rx_max_size;

	struct cxgbi_ports_map pmap;

	struct cxgbi_tag_format tag_format;

	struct cxgbi_ddp_info *ddp;

	void (*dev_ddp_cleanup)(struct cxgbi_device *);

	void (*csk_ddp_free_gl_skb)(struct cxgbi_ddp_info *, int, int);

	int (*csk_ddp_alloc_gl_skb)(struct cxgbi_ddp_info *, int, int, gfp_t);

	int (*csk_ddp_set)(struct cxgbi_sock *, struct cxgbi_pagepod_hdr *,

				unsigned int, unsigned int,

				struct cxgbi_gather_list *);

	void (*csk_ddp_clear)(struct cxgbi_hba *,

				unsigned int, unsigned int, unsigned int);

	int (*csk_ddp_setup_digest)(struct cxgbi_sock *,

				unsigned int, int, int, int);

	int (*csk_ddp_setup_pgidx)(struct cxgbi_sock *,

				unsigned int, int, bool);

	void (*csk_release_offload_resources)(struct cxgbi_sock *);

	int (*csk_rx_pdu_ready)(struct cxgbi_sock *, struct sk_buff *);

	u32 (*csk_send_rx_credits)(struct cxgbi_sock *, u32);

	int (*csk_push_tx_frames)(struct cxgbi_sock *, int);

	void (*csk_send_abort_req)(struct cxgbi_sock *);

	void (*csk_send_close_req)(struct cxgbi_sock *);

	int (*csk_alloc_cpls)(struct cxgbi_sock *);

	int (*csk_init_act_open)(struct cxgbi_sock *);

	void *dd_data;

};

#define cxgbi_cdev_priv(cdev)	((cdev)->dd_data)

struct cxgbi_conn {

	struct cxgbi_endpoint *cep;

	struct iscsi_conn *iconn;

	struct cxgbi_hba *chba;

	u32 task_idx_bits;

};

struct cxgbi_endpoint {

	struct cxgbi_conn *cconn;

	struct cxgbi_hba *chba;

	struct cxgbi_sock *csk;

};

#define MAX_PDU_FRAGS	((ULP2_MAX_PDU_PAYLOAD + 512 - 1) / 512)

struct cxgbi_task_data {

	unsigned short nr_frags;

	skb_frag_t frags[MAX_PDU_FRAGS];

	struct sk_buff *skb;

	unsigned int offset;

	unsigned int count;

	unsigned int sgoffset;

};

static inline int cxgbi_is_ddp_tag(struct cxgbi_tag_format *tformat, u32 tag)

{

	return !(tag & (1 << (tformat->rsvd_bits + tformat->rsvd_shift - 1)));

}

static inline int cxgbi_sw_tag_usable(struct cxgbi_tag_format *tformat,

					u32 sw_tag)

{

	sw_tag >>= (32 - tformat->rsvd_bits);

	return !sw_tag;

}

static inline u32 cxgbi_set_non_ddp_tag(struct cxgbi_tag_format *tformat,

					u32 sw_tag)

{

	unsigned char shift = tformat->rsvd_bits + tformat->rsvd_shift - 1;

	u32 mask = (1 << shift) - 1;

	if (sw_tag && (sw_tag & ~mask)) {

		u32 v1 = sw_tag & ((1 << shift) - 1);

		u32 v2 = (sw_tag >> (shift - 1)) << shift;

		return v2 | v1 | 1 << shift;

	}

	return sw_tag | 1 << shift;

}

static inline u32 cxgbi_ddp_tag_base(struct cxgbi_tag_format *tformat,

					u32 sw_tag)

{

	u32 mask = (1 << tformat->rsvd_shift) - 1;

	if (sw_tag && (sw_tag & ~mask)) {

		u32 v1 = sw_tag & mask;

		u32 v2 = sw_tag >> tformat->rsvd_shift;

		v2 <<= tformat->rsvd_bits + tformat->rsvd_shift;

		return v2 | v1;

	}

	return sw_tag;

}

static inline u32 cxgbi_tag_rsvd_bits(struct cxgbi_tag_format *tformat,

					u32 tag)

{

	if (cxgbi_is_ddp_tag(tformat, tag))

		return (tag >> tformat->rsvd_shift) & tformat->rsvd_mask;

	return 0;

}

static inline u32 cxgbi_tag_nonrsvd_bits(struct cxgbi_tag_format *tformat,

					u32 tag)

{

	unsigned char shift = tformat->rsvd_bits + tformat->rsvd_shift - 1;

	u32 v1, v2;

	if (cxgbi_is_ddp_tag(tformat, tag)) {

		v1 = tag & ((1 << tformat->rsvd_shift) - 1);

		v2 = (tag >> (shift + 1)) << tformat->rsvd_shift;

	} else {

		u32 mask = (1 << shift) - 1;

		tag &= ~(1 << shift);

		v1 = tag & mask;

		v2 = (tag >> 1) & ~mask;

	}

	return v1 | v2;

}

static inline void *cxgbi_alloc_big_mem(unsigned int size,

					gfp_t gfp)

{

	void *p = kmalloc(size, gfp);

	if (!p)

		p = vmalloc(size);

	if (p)

		memset(p, 0, size);

	return p;

}

static inline void cxgbi_free_big_mem(void *addr)

{

	if (is_vmalloc_addr(addr))

		vfree(addr);

	else

		kfree(addr);

}

static inline void cxgbi_set_iscsi_ipv4(struct cxgbi_hba *chba, __be32 ipaddr)

{

	if (chba->cdev->flags & CXGBI_FLAG_IPV4_SET)

		chba->ipv4addr = ipaddr;

	else

		pr_info("set iscsi ipv4 NOT supported, using %s ipv4.\n",

			chba->ndev->name);

}

static inline __be32 cxgbi_get_iscsi_ipv4(struct cxgbi_hba *chba)

{

	return chba->ipv4addr;

}

struct cxgbi_device *cxgbi_device_register(unsigned int, unsigned int);

void cxgbi_device_unregister(struct cxgbi_device *);

void cxgbi_device_unregister_all(unsigned int flag);

struct cxgbi_device *cxgbi_device_find_by_lldev(void *);

int cxgbi_hbas_add(struct cxgbi_device *, unsigned int, unsigned int,

			struct scsi_host_template *,

			struct scsi_transport_template *);

void cxgbi_hbas_remove(struct cxgbi_device *);

int cxgbi_device_portmap_create(struct cxgbi_device *cdev, unsigned int base,

			unsigned int max_conn);

void cxgbi_device_portmap_cleanup(struct cxgbi_device *cdev);

void cxgbi_conn_tx_open(struct cxgbi_sock *);

void cxgbi_conn_pdu_ready(struct cxgbi_sock *);

int cxgbi_conn_alloc_pdu(struct iscsi_task *, u8);

int cxgbi_conn_init_pdu(struct iscsi_task *, unsigned int , unsigned int);

int cxgbi_conn_xmit_pdu(struct iscsi_task *);

void cxgbi_cleanup_task(struct iscsi_task *task);

void cxgbi_get_conn_stats(struct iscsi_cls_conn *, struct iscsi_stats *);

int cxgbi_set_conn_param(struct iscsi_cls_conn *,

			enum iscsi_param, char *, int);

int cxgbi_get_conn_param(struct iscsi_cls_conn *, enum iscsi_param, char *);

struct iscsi_cls_conn *cxgbi_create_conn(struct iscsi_cls_session *, u32);

int cxgbi_bind_conn(struct iscsi_cls_session *,