linux/drivers/target/iscsi/cxgbit/cxgbit.h

356 lines
8.1 KiB
C

/*
* Copyright (c) 2016 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 version 2 as
* published by the Free Software Foundation.
*/
#ifndef __CXGBIT_H__
#define __CXGBIT_H__
#include <linux/mutex.h>
#include <linux/list.h>
#include <linux/spinlock.h>
#include <linux/idr.h>
#include <linux/completion.h>
#include <linux/netdevice.h>
#include <linux/sched.h>
#include <linux/pci.h>
#include <linux/dma-mapping.h>
#include <linux/inet.h>
#include <linux/wait.h>
#include <linux/kref.h>
#include <linux/timer.h>
#include <linux/io.h>
#include <asm/byteorder.h>
#include <net/net_namespace.h>
#include <target/iscsi/iscsi_transport.h>
#include <iscsi_target_parameters.h>
#include <iscsi_target_login.h>
#include "t4_regs.h"
#include "t4_msg.h"
#include "cxgb4.h"
#include "cxgb4_uld.h"
#include "l2t.h"
#include "libcxgb_ppm.h"
#include "cxgbit_lro.h"
extern struct mutex cdev_list_lock;
extern struct list_head cdev_list_head;
struct cxgbit_np;
struct cxgbit_sock;
struct cxgbit_cmd {
struct scatterlist sg;
struct cxgbi_task_tag_info ttinfo;
bool setup_ddp;
bool release;
};
#define CXGBIT_MAX_ISO_PAYLOAD \
min_t(u32, MAX_SKB_FRAGS * PAGE_SIZE, 65535)
struct cxgbit_iso_info {
u8 flags;
u32 mpdu;
u32 len;
u32 burst_len;
};
enum cxgbit_skcb_flags {
SKCBF_TX_NEED_HDR = (1 << 0), /* packet needs a header */
SKCBF_TX_FLAG_COMPL = (1 << 1), /* wr completion flag */
SKCBF_TX_ISO = (1 << 2), /* iso cpl in tx skb */
SKCBF_RX_LRO = (1 << 3), /* lro skb */
};
struct cxgbit_skb_rx_cb {
u8 opcode;
void *pdu_cb;
void (*backlog_fn)(struct cxgbit_sock *, struct sk_buff *);
};
struct cxgbit_skb_tx_cb {
u8 submode;
u32 extra_len;
};
union cxgbit_skb_cb {
struct {
u8 flags;
union {
struct cxgbit_skb_tx_cb tx;
struct cxgbit_skb_rx_cb rx;
};
};
struct {
/* This member must be first. */
struct l2t_skb_cb l2t;
struct sk_buff *wr_next;
};
};
#define CXGBIT_SKB_CB(skb) ((union cxgbit_skb_cb *)&((skb)->cb[0]))
#define cxgbit_skcb_flags(skb) (CXGBIT_SKB_CB(skb)->flags)
#define cxgbit_skcb_submode(skb) (CXGBIT_SKB_CB(skb)->tx.submode)
#define cxgbit_skcb_tx_wr_next(skb) (CXGBIT_SKB_CB(skb)->wr_next)
#define cxgbit_skcb_tx_extralen(skb) (CXGBIT_SKB_CB(skb)->tx.extra_len)
#define cxgbit_skcb_rx_opcode(skb) (CXGBIT_SKB_CB(skb)->rx.opcode)
#define cxgbit_skcb_rx_backlog_fn(skb) (CXGBIT_SKB_CB(skb)->rx.backlog_fn)
#define cxgbit_rx_pdu_cb(skb) (CXGBIT_SKB_CB(skb)->rx.pdu_cb)
static inline void *cplhdr(struct sk_buff *skb)
{
return skb->data;
}
enum cxgbit_cdev_flags {
CDEV_STATE_UP = 0,
CDEV_ISO_ENABLE,
CDEV_DDP_ENABLE,
};
#define NP_INFO_HASH_SIZE 32
struct np_info {
struct np_info *next;
struct cxgbit_np *cnp;
unsigned int stid;
};
struct cxgbit_list_head {
struct list_head list;
/* device lock */
spinlock_t lock;
};
struct cxgbit_device {
struct list_head list;
struct cxgb4_lld_info lldi;
struct np_info *np_hash_tab[NP_INFO_HASH_SIZE];
/* np lock */
spinlock_t np_lock;
u8 selectq[MAX_NPORTS][2];
struct cxgbit_list_head cskq;
u32 mdsl;
struct kref kref;
unsigned long flags;
};
struct cxgbit_wr_wait {
struct completion completion;
int ret;
};
enum cxgbit_csk_state {
CSK_STATE_IDLE = 0,
CSK_STATE_LISTEN,
CSK_STATE_CONNECTING,
CSK_STATE_ESTABLISHED,
CSK_STATE_ABORTING,
CSK_STATE_CLOSING,
CSK_STATE_MORIBUND,
CSK_STATE_DEAD,
};
enum cxgbit_csk_flags {
CSK_TX_DATA_SENT = 0,
CSK_LOGIN_PDU_DONE,
CSK_LOGIN_DONE,
CSK_DDP_ENABLE,
CSK_ABORT_RPL_WAIT,
};
struct cxgbit_sock_common {
struct cxgbit_device *cdev;
struct sockaddr_storage local_addr;
struct sockaddr_storage remote_addr;
struct cxgbit_wr_wait wr_wait;
enum cxgbit_csk_state state;
unsigned long flags;
};
struct cxgbit_np {
struct cxgbit_sock_common com;
wait_queue_head_t accept_wait;
struct iscsi_np *np;
struct completion accept_comp;
struct list_head np_accept_list;
/* np accept lock */
spinlock_t np_accept_lock;
struct kref kref;
unsigned int stid;
};
struct cxgbit_sock {
struct cxgbit_sock_common com;
struct cxgbit_np *cnp;
struct iscsi_conn *conn;
struct l2t_entry *l2t;
struct dst_entry *dst;
struct list_head list;
struct sk_buff_head rxq;
struct sk_buff_head txq;
struct sk_buff_head ppodq;
struct sk_buff_head backlogq;
struct sk_buff_head skbq;
struct sk_buff *wr_pending_head;
struct sk_buff *wr_pending_tail;
struct sk_buff *skb;
struct sk_buff *lro_skb;
struct sk_buff *lro_hskb;
struct list_head accept_node;
/* socket lock */
spinlock_t lock;
wait_queue_head_t waitq;
wait_queue_head_t ack_waitq;
bool lock_owner;
struct kref kref;
u32 max_iso_npdu;
u32 wr_cred;
u32 wr_una_cred;
u32 wr_max_cred;
u32 snd_una;
u32 tid;
u32 snd_nxt;
u32 rcv_nxt;
u32 smac_idx;
u32 tx_chan;
u32 mtu;
u32 write_seq;
u32 rx_credits;
u32 snd_win;
u32 rcv_win;
u16 mss;
u16 emss;
u16 plen;
u16 rss_qid;
u16 txq_idx;
u16 ctrlq_idx;
u8 tos;
u8 port_id;
#define CXGBIT_SUBMODE_HCRC 0x1
#define CXGBIT_SUBMODE_DCRC 0x2
u8 submode;
#ifdef CONFIG_CHELSIO_T4_DCB
u8 dcb_priority;
#endif
u8 snd_wscale;
};
void _cxgbit_free_cdev(struct kref *kref);
void _cxgbit_free_csk(struct kref *kref);
void _cxgbit_free_cnp(struct kref *kref);
static inline void cxgbit_get_cdev(struct cxgbit_device *cdev)
{
kref_get(&cdev->kref);
}
static inline void cxgbit_put_cdev(struct cxgbit_device *cdev)
{
kref_put(&cdev->kref, _cxgbit_free_cdev);
}
static inline void cxgbit_get_csk(struct cxgbit_sock *csk)
{
kref_get(&csk->kref);
}
static inline void cxgbit_put_csk(struct cxgbit_sock *csk)
{
kref_put(&csk->kref, _cxgbit_free_csk);
}
static inline void cxgbit_get_cnp(struct cxgbit_np *cnp)
{
kref_get(&cnp->kref);
}
static inline void cxgbit_put_cnp(struct cxgbit_np *cnp)
{
kref_put(&cnp->kref, _cxgbit_free_cnp);
}
static inline void cxgbit_sock_reset_wr_list(struct cxgbit_sock *csk)
{
csk->wr_pending_tail = NULL;
csk->wr_pending_head = NULL;
}
static inline struct sk_buff *cxgbit_sock_peek_wr(const struct cxgbit_sock *csk)
{
return csk->wr_pending_head;
}
static inline void
cxgbit_sock_enqueue_wr(struct cxgbit_sock *csk, struct sk_buff *skb)
{
cxgbit_skcb_tx_wr_next(skb) = NULL;
skb_get(skb);
if (!csk->wr_pending_head)
csk->wr_pending_head = skb;
else
cxgbit_skcb_tx_wr_next(csk->wr_pending_tail) = skb;
csk->wr_pending_tail = skb;
}
static inline struct sk_buff *cxgbit_sock_dequeue_wr(struct cxgbit_sock *csk)
{
struct sk_buff *skb = csk->wr_pending_head;
if (likely(skb)) {
csk->wr_pending_head = cxgbit_skcb_tx_wr_next(skb);
cxgbit_skcb_tx_wr_next(skb) = NULL;
}
return skb;
}
typedef void (*cxgbit_cplhandler_func)(struct cxgbit_device *,
struct sk_buff *);
int cxgbit_setup_np(struct iscsi_np *, struct sockaddr_storage *);
int cxgbit_setup_conn_digest(struct cxgbit_sock *);
int cxgbit_accept_np(struct iscsi_np *, struct iscsi_conn *);
void cxgbit_free_np(struct iscsi_np *);
void cxgbit_abort_conn(struct cxgbit_sock *csk);
void cxgbit_free_conn(struct iscsi_conn *);
extern cxgbit_cplhandler_func cxgbit_cplhandlers[NUM_CPL_CMDS];
int cxgbit_get_login_rx(struct iscsi_conn *, struct iscsi_login *);
int cxgbit_rx_data_ack(struct cxgbit_sock *);
int cxgbit_l2t_send(struct cxgbit_device *, struct sk_buff *,
struct l2t_entry *);
void cxgbit_push_tx_frames(struct cxgbit_sock *);
int cxgbit_put_login_tx(struct iscsi_conn *, struct iscsi_login *, u32);
int cxgbit_xmit_pdu(struct iscsi_conn *, struct iscsi_cmd *,
struct iscsi_datain_req *, const void *, u32);
void cxgbit_get_r2t_ttt(struct iscsi_conn *, struct iscsi_cmd *,
struct iscsi_r2t *);
u32 cxgbit_send_tx_flowc_wr(struct cxgbit_sock *);
int cxgbit_ofld_send(struct cxgbit_device *, struct sk_buff *);
void cxgbit_get_rx_pdu(struct iscsi_conn *);
int cxgbit_validate_params(struct iscsi_conn *);
struct cxgbit_device *cxgbit_find_device(struct net_device *, u8 *);
/* DDP */
int cxgbit_ddp_init(struct cxgbit_device *);
int cxgbit_setup_conn_pgidx(struct cxgbit_sock *, u32);
int cxgbit_reserve_ttt(struct cxgbit_sock *, struct iscsi_cmd *);
void cxgbit_release_cmd(struct iscsi_conn *, struct iscsi_cmd *);
static inline
struct cxgbi_ppm *cdev2ppm(struct cxgbit_device *cdev)
{
return (struct cxgbi_ppm *)(*cdev->lldi.iscsi_ppm);
}
#endif /* __CXGBIT_H__ */