cxgbei.h

Go to the documentation of this file.

/*-
 * Copyright (c) 2012, 2015 Chelsio Communications, Inc.
 * All rights reserved.
 *
 * 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 __CXGBEI_OFLD_H__
#define __CXGBEI_OFLD_H__
 
#include <dev/iscsi/icl.h>
 
#define CXGBEI_CONN_SIGNATURE 0x56788765
 
struct cxgbei_cmp {
        LIST_ENTRY(cxgbei_cmp) link;
 
        uint32_t tt;            /* Transfer tag. */
 
        uint32_t next_buffer_offset;
        uint32_t last_datasn;
};
LIST_HEAD(cxgbei_cmp_head, cxgbei_cmp);
 
struct icl_cxgbei_conn {
        struct icl_conn ic;
 
        /* cxgbei specific stuff goes here. */
        uint32_t icc_signature;
        int ulp_submode;
        struct adapter *sc;
        struct toepcb *toep;
 
        /* Receive related. */
        bool rx_active;                         /* protected by so_rcv lock */
        bool rx_exiting;                        /* protected by so_rcv lock */
        STAILQ_HEAD(, icl_pdu) rcvd_pdus;       /* protected by so_rcv lock */
        struct thread *rx_thread;
 
        struct cxgbei_cmp_head *cmp_table;      /* protected by cmp_lock */
        struct mtx cmp_lock;
        unsigned long cmp_hash_mask;
 
        /* Transmit related. */
        bool tx_active;                         /* protected by ic lock */
        STAILQ_HEAD(, icl_pdu) sent_pdus;       /* protected by ic lock */
        struct thread *tx_thread;
};
 
static inline struct icl_cxgbei_conn *
ic_to_icc(struct icl_conn *ic)
{
 
        return (__containerof(ic, struct icl_cxgbei_conn, ic));
}
 
/* PDU flags and signature. */
enum {
        ICPF_RX_HDR     = 1 << 0, /* PDU header received. */
        ICPF_RX_FLBUF   = 1 << 1, /* PDU payload received in a freelist. */
        ICPF_RX_DDP     = 1 << 2, /* PDU payload DDP'd. */
        ICPF_RX_STATUS  = 1 << 3, /* Rx status received. */
 
        CXGBEI_PDU_SIGNATURE = 0x12344321
};
 
struct icl_cxgbei_pdu {
        struct icl_pdu ip;
 
        /* cxgbei specific stuff goes here. */
        uint32_t icp_signature;
        uint32_t icp_seq;       /* For debug only */
        u_int icp_flags;
 
        u_int ref_cnt;
        icl_pdu_cb cb;
        int error;
};
 
static inline struct icl_cxgbei_pdu *
ip_to_icp(struct icl_pdu *ip)
{
 
        return (__containerof(ip, struct icl_cxgbei_pdu, ip));
}
 
struct cxgbei_data {
        u_int max_tx_data_len;
        u_int max_rx_data_len;
 
        u_int ddp_threshold;
        struct ppod_region pr;
 
        struct sysctl_ctx_list ctx;     /* from uld_activate to deactivate */
};
 
#define CXGBEI_MAX_ISO_PAYLOAD  65535
 
/* cxgbei.c */
u_int cxgbei_select_worker_thread(struct icl_cxgbei_conn *);
void cwt_queue_for_tx(struct icl_cxgbei_conn *);
void parse_pdus(struct icl_cxgbei_conn *, struct sockbuf *);
 
/* icl_cxgbei.c */
void cwt_tx_main(void *);
int icl_cxgbei_mod_load(void);
int icl_cxgbei_mod_unload(void);
struct icl_pdu *icl_cxgbei_new_pdu(int);
void icl_cxgbei_new_pdu_set_conn(struct icl_pdu *, struct icl_conn *);
void icl_cxgbei_conn_pdu_free(struct icl_conn *, struct icl_pdu *);
struct cxgbei_cmp *cxgbei_find_cmp(struct icl_cxgbei_conn *, uint32_t);
 
#endif