+++ /dev/null
-/*
- * cxgb3i_offload.h: Chelsio S3xx iscsi offloaded tcp connection management
- *
- * Copyright (C) 2003-2008 Chelsio Communications. All rights reserved.
- *
- * 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 LICENSE file included in this
- * release for licensing terms and conditions.
- *
- * Written by: Dimitris Michailidis (dm@chelsio.com)
- * Karen Xie (kxie@chelsio.com)
- */
-
-#ifndef _CXGB3I_OFFLOAD_H
-#define _CXGB3I_OFFLOAD_H
-
-#include <linux/skbuff.h>
-#include <linux/in.h>
-
-#include "common.h"
-#include "adapter.h"
-#include "t3cdev.h"
-#include "cxgb3_offload.h"
-
-#define cxgb3i_log_error(fmt...) printk(KERN_ERR "cxgb3i: ERR! " fmt)
-#define cxgb3i_log_warn(fmt...) printk(KERN_WARNING "cxgb3i: WARN! " fmt)
-#define cxgb3i_log_info(fmt...) printk(KERN_INFO "cxgb3i: " fmt)
-#define cxgb3i_log_debug(fmt, args...) \
- printk(KERN_INFO "cxgb3i: %s - " fmt, __func__ , ## args)
-
-/**
- * struct s3_conn - an iscsi tcp connection structure
- *
- * @dev: net device of with connection
- * @cdev: adapter t3cdev for net device
- * @flags: see c3cn_flags below
- * @tid: connection id assigned by the h/w
- * @qset: queue set used by connection
- * @mss_idx: Maximum Segment Size table index
- * @l2t: ARP resolution entry for offload packets
- * @wr_max: maximum in-flight writes
- * @wr_avail: number of writes available
- * @wr_unacked: writes since last request for completion notification
- * @wr_pending_head: head of pending write queue
- * @wr_pending_tail: tail of pending write queue
- * @cpl_close: skb for cpl_close_req
- * @cpl_abort_req: skb for cpl_abort_req
- * @cpl_abort_rpl: skb for cpl_abort_rpl
- * @lock: connection status lock
- * @refcnt: reference count on connection
- * @state: connection state
- * @saddr: source ip/port address
- * @daddr: destination ip/port address
- * @dst_cache: reference to destination route
- * @receive_queue: received PDUs
- * @write_queue: un-pushed pending writes
- * @retry_timer: retry timer for various operations
- * @err: connection error status
- * @callback_lock: lock for opaque user context
- * @user_data: opaque user context
- * @rcv_nxt: next receive seq. #
- * @copied_seq: head of yet unread data
- * @rcv_wup: rcv_nxt on last window update sent
- * @snd_nxt: next sequence we send
- * @snd_una: first byte we want an ack for
- * @write_seq: tail+1 of data held in send buffer
- */
-struct s3_conn {
- struct net_device *dev;
- struct t3cdev *cdev;
- unsigned long flags;
- int tid;
- int qset;
- int mss_idx;
- struct l2t_entry *l2t;
- int wr_max;
- int wr_avail;
- int wr_unacked;
- 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;
- spinlock_t lock;
- atomic_t refcnt;
- volatile unsigned int state;
- struct sockaddr_in saddr;
- struct sockaddr_in daddr;
- struct dst_entry *dst_cache;
- 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 state
- */
-enum conn_states {
- C3CN_STATE_CONNECTING = 1,
- C3CN_STATE_ESTABLISHED,
- C3CN_STATE_ACTIVE_CLOSE,
- C3CN_STATE_PASSIVE_CLOSE,
- C3CN_STATE_CLOSE_WAIT_1,
- C3CN_STATE_CLOSE_WAIT_2,
- C3CN_STATE_ABORTING,
- C3CN_STATE_CLOSED,
-};
-
-static inline unsigned int c3cn_is_closing(const struct s3_conn *c3cn)
-{
- return c3cn->state >= C3CN_STATE_ACTIVE_CLOSE;
-}
-static inline unsigned int c3cn_is_established(const struct s3_conn *c3cn)
-{
- return c3cn->state == C3CN_STATE_ESTABLISHED;
-}
-
-/*
- * Connection flags -- many to track some close related events.
- */
-enum c3cn_flags {
- C3CN_ABORT_RPL_RCVD, /* received one ABORT_RPL_RSS message */
- C3CN_ABORT_REQ_RCVD, /* received one ABORT_REQ_RSS message */
- C3CN_ABORT_RPL_PENDING, /* expecting an abort reply */
- C3CN_TX_DATA_SENT, /* already sent a TX_DATA WR */
- C3CN_ACTIVE_CLOSE_NEEDED, /* need to be closed */
- C3CN_OFFLOAD_DOWN /* offload function off */
-};
-
-/**
- * cxgb3i_sdev_data - Per adapter data.
- * Linked off of each Ethernet device port on the adapter.
- * Also available via the t3cdev structure since we have pointers to our port
- * net_device's there ...
- *
- * @list: list head to link elements
- * @cdev: t3cdev adapter
- * @client: CPL client pointer
- * @ports: array of adapter ports
- * @sport_next: next port
- * @sport_conn: source port connection
- */
-struct cxgb3i_sdev_data {
- struct list_head list;
- struct t3cdev *cdev;
- struct cxgb3_client *client;
- struct adap_ports ports;
- spinlock_t lock;
- unsigned int sport_next;
- struct s3_conn *sport_conn[0];
-};
-#define NDEV2CDATA(ndev) (*(struct cxgb3i_sdev_data **)&(ndev)->ec_ptr)
-#define CXGB3_SDEV_DATA(cdev) NDEV2CDATA((cdev)->lldev)
-
-void cxgb3i_sdev_cleanup(void);
-int cxgb3i_sdev_init(cxgb3_cpl_handler_func *);
-void cxgb3i_sdev_add(struct t3cdev *, struct cxgb3_client *);
-void cxgb3i_sdev_remove(struct t3cdev *);
-
-struct s3_conn *cxgb3i_c3cn_create(void);
-int cxgb3i_c3cn_connect(struct net_device *, struct s3_conn *,
- struct sockaddr_in *);
-void cxgb3i_c3cn_rx_credits(struct s3_conn *, int);
-int cxgb3i_c3cn_send_pdus(struct s3_conn *, struct sk_buff *);
-void cxgb3i_c3cn_release(struct s3_conn *);
-
-/**
- * cxgb3_skb_cb - control block for received pdu state and ULP mode management.
- *
- * @flag: see C3CB_FLAG_* below
- * @ulp_mode: ULP mode/submode of sk_buff
- * @seq: tcp sequence number
- */
-struct cxgb3_skb_rx_cb {
- __u32 ddigest; /* data digest */
- __u32 pdulen; /* recovered pdu length */
-};
-
-struct cxgb3_skb_tx_cb {
- struct sk_buff *wr_next; /* next wr */
-};
-
-struct cxgb3_skb_cb {
- __u8 flags;
- __u8 ulp_mode;
- __u32 seq;
- union {
- struct cxgb3_skb_rx_cb rx;
- struct cxgb3_skb_tx_cb tx;
- };
-};
-
-#define CXGB3_SKB_CB(skb) ((struct cxgb3_skb_cb *)&((skb)->cb[0]))
-#define skb_flags(skb) (CXGB3_SKB_CB(skb)->flags)
-#define skb_ulp_mode(skb) (CXGB3_SKB_CB(skb)->ulp_mode)
-#define skb_tcp_seq(skb) (CXGB3_SKB_CB(skb)->seq)
-#define skb_rx_ddigest(skb) (CXGB3_SKB_CB(skb)->rx.ddigest)
-#define skb_rx_pdulen(skb) (CXGB3_SKB_CB(skb)->rx.pdulen)
-#define skb_tx_wr_next(skb) (CXGB3_SKB_CB(skb)->tx.wr_next)
-
-enum c3cb_flags {
- C3CB_FLAG_NEED_HDR = 1 << 0, /* packet needs a TX_DATA_WR header */
- C3CB_FLAG_NO_APPEND = 1 << 1, /* don't grow this skb */
- C3CB_FLAG_COMPL = 1 << 2, /* request WR completion */
-};
-
-/**
- * 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];
-};
-
-/* for TX: a skb must have a headroom of at least TX_HEADER_LEN bytes */
-#define TX_HEADER_LEN \
- (sizeof(struct tx_data_wr) + sizeof(struct sge_opaque_hdr))
-#define SKB_TX_HEADROOM SKB_MAX_HEAD(TX_HEADER_LEN)
-
-/*
- * get and set private ip for iscsi traffic
- */
-#define cxgb3i_get_private_ipv4addr(ndev) \
- (((struct port_info *)(netdev_priv(ndev)))->iscsi_ipv4addr)
-#define cxgb3i_set_private_ipv4addr(ndev, addr) \
- (((struct port_info *)(netdev_priv(ndev)))->iscsi_ipv4addr) = addr
-
-/* max. connections per adapter */
-#define CXGB3I_MAX_CONN 16384
-#endif /* _CXGB3_OFFLOAD_H */
projects / mv-sheeva.git / blobdiff