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b8b9d81b36
Add common library module(libcxgb.ko) for Chelsio drivers to remove duplicate code. Code for iSCSI DDP Page Pod Manager is moved from cxgb4.ko to libcxgb.ko. Earlier only cxgbit.ko was using this code, now cxgb3i and cxgb4i will also use common Page Pod manager code. In future this module will have common connection management and hardware specific code that can be shared by multiple Chelsio drivers. Signed-off-by: Varun Prakash <varun@chelsio.com> Reviewed-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: David S. Miller <davem@davemloft.net>
354 lines
8.1 KiB
C
354 lines
8.1 KiB
C
/*
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* Copyright (c) 2016 Chelsio Communications, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#ifndef __CXGBIT_H__
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#define __CXGBIT_H__
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#include <linux/mutex.h>
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#include <linux/list.h>
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#include <linux/spinlock.h>
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#include <linux/idr.h>
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#include <linux/completion.h>
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#include <linux/netdevice.h>
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#include <linux/sched.h>
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#include <linux/pci.h>
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#include <linux/dma-mapping.h>
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#include <linux/inet.h>
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#include <linux/wait.h>
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#include <linux/kref.h>
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#include <linux/timer.h>
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#include <linux/io.h>
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#include <asm/byteorder.h>
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#include <net/net_namespace.h>
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#include <target/iscsi/iscsi_transport.h>
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#include <iscsi_target_parameters.h>
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#include <iscsi_target_login.h>
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#include "t4_regs.h"
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#include "t4_msg.h"
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#include "cxgb4.h"
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#include "cxgb4_uld.h"
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#include "l2t.h"
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#include "libcxgb_ppm.h"
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#include "cxgbit_lro.h"
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extern struct mutex cdev_list_lock;
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extern struct list_head cdev_list_head;
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struct cxgbit_np;
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struct cxgbit_sock;
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struct cxgbit_cmd {
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struct scatterlist sg;
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struct cxgbi_task_tag_info ttinfo;
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bool setup_ddp;
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bool release;
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};
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#define CXGBIT_MAX_ISO_PAYLOAD \
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min_t(u32, MAX_SKB_FRAGS * PAGE_SIZE, 65535)
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struct cxgbit_iso_info {
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u8 flags;
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u32 mpdu;
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u32 len;
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u32 burst_len;
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};
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enum cxgbit_skcb_flags {
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SKCBF_TX_NEED_HDR = (1 << 0), /* packet needs a header */
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SKCBF_TX_FLAG_COMPL = (1 << 1), /* wr completion flag */
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SKCBF_TX_ISO = (1 << 2), /* iso cpl in tx skb */
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SKCBF_RX_LRO = (1 << 3), /* lro skb */
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};
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struct cxgbit_skb_rx_cb {
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u8 opcode;
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void *pdu_cb;
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void (*backlog_fn)(struct cxgbit_sock *, struct sk_buff *);
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};
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struct cxgbit_skb_tx_cb {
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u8 submode;
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u32 extra_len;
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};
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union cxgbit_skb_cb {
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struct {
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u8 flags;
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union {
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struct cxgbit_skb_tx_cb tx;
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struct cxgbit_skb_rx_cb rx;
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};
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};
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struct {
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/* This member must be first. */
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struct l2t_skb_cb l2t;
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struct sk_buff *wr_next;
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};
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};
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#define CXGBIT_SKB_CB(skb) ((union cxgbit_skb_cb *)&((skb)->cb[0]))
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#define cxgbit_skcb_flags(skb) (CXGBIT_SKB_CB(skb)->flags)
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#define cxgbit_skcb_submode(skb) (CXGBIT_SKB_CB(skb)->tx.submode)
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#define cxgbit_skcb_tx_wr_next(skb) (CXGBIT_SKB_CB(skb)->wr_next)
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#define cxgbit_skcb_tx_extralen(skb) (CXGBIT_SKB_CB(skb)->tx.extra_len)
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#define cxgbit_skcb_rx_opcode(skb) (CXGBIT_SKB_CB(skb)->rx.opcode)
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#define cxgbit_skcb_rx_backlog_fn(skb) (CXGBIT_SKB_CB(skb)->rx.backlog_fn)
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#define cxgbit_rx_pdu_cb(skb) (CXGBIT_SKB_CB(skb)->rx.pdu_cb)
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static inline void *cplhdr(struct sk_buff *skb)
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{
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return skb->data;
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}
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enum cxgbit_cdev_flags {
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CDEV_STATE_UP = 0,
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CDEV_ISO_ENABLE,
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CDEV_DDP_ENABLE,
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};
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#define NP_INFO_HASH_SIZE 32
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struct np_info {
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struct np_info *next;
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struct cxgbit_np *cnp;
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unsigned int stid;
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};
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struct cxgbit_list_head {
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struct list_head list;
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/* device lock */
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spinlock_t lock;
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};
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struct cxgbit_device {
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struct list_head list;
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struct cxgb4_lld_info lldi;
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struct np_info *np_hash_tab[NP_INFO_HASH_SIZE];
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/* np lock */
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spinlock_t np_lock;
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u8 selectq[MAX_NPORTS][2];
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struct cxgbit_list_head cskq;
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u32 mdsl;
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struct kref kref;
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unsigned long flags;
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};
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struct cxgbit_wr_wait {
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struct completion completion;
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int ret;
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};
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enum cxgbit_csk_state {
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CSK_STATE_IDLE = 0,
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CSK_STATE_LISTEN,
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CSK_STATE_CONNECTING,
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CSK_STATE_ESTABLISHED,
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CSK_STATE_ABORTING,
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CSK_STATE_CLOSING,
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CSK_STATE_MORIBUND,
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CSK_STATE_DEAD,
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};
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enum cxgbit_csk_flags {
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CSK_TX_DATA_SENT = 0,
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CSK_LOGIN_PDU_DONE,
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CSK_LOGIN_DONE,
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CSK_DDP_ENABLE,
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};
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struct cxgbit_sock_common {
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struct cxgbit_device *cdev;
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struct sockaddr_storage local_addr;
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struct sockaddr_storage remote_addr;
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struct cxgbit_wr_wait wr_wait;
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enum cxgbit_csk_state state;
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unsigned long flags;
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};
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struct cxgbit_np {
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struct cxgbit_sock_common com;
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wait_queue_head_t accept_wait;
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struct iscsi_np *np;
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struct completion accept_comp;
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struct list_head np_accept_list;
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/* np accept lock */
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spinlock_t np_accept_lock;
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struct kref kref;
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unsigned int stid;
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};
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struct cxgbit_sock {
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struct cxgbit_sock_common com;
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struct cxgbit_np *cnp;
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struct iscsi_conn *conn;
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struct l2t_entry *l2t;
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struct dst_entry *dst;
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struct list_head list;
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struct sk_buff_head rxq;
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struct sk_buff_head txq;
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struct sk_buff_head ppodq;
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struct sk_buff_head backlogq;
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struct sk_buff_head skbq;
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struct sk_buff *wr_pending_head;
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struct sk_buff *wr_pending_tail;
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struct sk_buff *skb;
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struct sk_buff *lro_skb;
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struct sk_buff *lro_hskb;
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struct list_head accept_node;
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/* socket lock */
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spinlock_t lock;
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wait_queue_head_t waitq;
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wait_queue_head_t ack_waitq;
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bool lock_owner;
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struct kref kref;
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u32 max_iso_npdu;
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u32 wr_cred;
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u32 wr_una_cred;
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u32 wr_max_cred;
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u32 snd_una;
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u32 tid;
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u32 snd_nxt;
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u32 rcv_nxt;
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u32 smac_idx;
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u32 tx_chan;
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u32 mtu;
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u32 write_seq;
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u32 rx_credits;
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u32 snd_win;
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u32 rcv_win;
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u16 mss;
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u16 emss;
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u16 plen;
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u16 rss_qid;
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u16 txq_idx;
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u16 ctrlq_idx;
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u8 tos;
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u8 port_id;
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#define CXGBIT_SUBMODE_HCRC 0x1
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#define CXGBIT_SUBMODE_DCRC 0x2
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u8 submode;
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#ifdef CONFIG_CHELSIO_T4_DCB
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u8 dcb_priority;
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#endif
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u8 snd_wscale;
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};
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void _cxgbit_free_cdev(struct kref *kref);
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void _cxgbit_free_csk(struct kref *kref);
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void _cxgbit_free_cnp(struct kref *kref);
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static inline void cxgbit_get_cdev(struct cxgbit_device *cdev)
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{
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kref_get(&cdev->kref);
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}
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static inline void cxgbit_put_cdev(struct cxgbit_device *cdev)
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{
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kref_put(&cdev->kref, _cxgbit_free_cdev);
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}
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static inline void cxgbit_get_csk(struct cxgbit_sock *csk)
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{
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kref_get(&csk->kref);
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}
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static inline void cxgbit_put_csk(struct cxgbit_sock *csk)
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{
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kref_put(&csk->kref, _cxgbit_free_csk);
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}
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static inline void cxgbit_get_cnp(struct cxgbit_np *cnp)
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{
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kref_get(&cnp->kref);
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}
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static inline void cxgbit_put_cnp(struct cxgbit_np *cnp)
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{
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kref_put(&cnp->kref, _cxgbit_free_cnp);
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}
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static inline void cxgbit_sock_reset_wr_list(struct cxgbit_sock *csk)
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{
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csk->wr_pending_tail = NULL;
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csk->wr_pending_head = NULL;
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}
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static inline struct sk_buff *cxgbit_sock_peek_wr(const struct cxgbit_sock *csk)
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{
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return csk->wr_pending_head;
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}
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static inline void
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cxgbit_sock_enqueue_wr(struct cxgbit_sock *csk, struct sk_buff *skb)
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{
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cxgbit_skcb_tx_wr_next(skb) = NULL;
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skb_get(skb);
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if (!csk->wr_pending_head)
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csk->wr_pending_head = skb;
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else
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cxgbit_skcb_tx_wr_next(csk->wr_pending_tail) = skb;
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csk->wr_pending_tail = skb;
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}
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static inline struct sk_buff *cxgbit_sock_dequeue_wr(struct cxgbit_sock *csk)
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{
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struct sk_buff *skb = csk->wr_pending_head;
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if (likely(skb)) {
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csk->wr_pending_head = cxgbit_skcb_tx_wr_next(skb);
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cxgbit_skcb_tx_wr_next(skb) = NULL;
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}
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return skb;
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}
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typedef void (*cxgbit_cplhandler_func)(struct cxgbit_device *,
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struct sk_buff *);
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int cxgbit_setup_np(struct iscsi_np *, struct sockaddr_storage *);
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int cxgbit_setup_conn_digest(struct cxgbit_sock *);
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int cxgbit_accept_np(struct iscsi_np *, struct iscsi_conn *);
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void cxgbit_free_np(struct iscsi_np *);
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void cxgbit_free_conn(struct iscsi_conn *);
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extern cxgbit_cplhandler_func cxgbit_cplhandlers[NUM_CPL_CMDS];
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int cxgbit_get_login_rx(struct iscsi_conn *, struct iscsi_login *);
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int cxgbit_rx_data_ack(struct cxgbit_sock *);
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int cxgbit_l2t_send(struct cxgbit_device *, struct sk_buff *,
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struct l2t_entry *);
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void cxgbit_push_tx_frames(struct cxgbit_sock *);
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int cxgbit_put_login_tx(struct iscsi_conn *, struct iscsi_login *, u32);
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int cxgbit_xmit_pdu(struct iscsi_conn *, struct iscsi_cmd *,
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struct iscsi_datain_req *, const void *, u32);
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void cxgbit_get_r2t_ttt(struct iscsi_conn *, struct iscsi_cmd *,
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struct iscsi_r2t *);
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u32 cxgbit_send_tx_flowc_wr(struct cxgbit_sock *);
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int cxgbit_ofld_send(struct cxgbit_device *, struct sk_buff *);
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void cxgbit_get_rx_pdu(struct iscsi_conn *);
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int cxgbit_validate_params(struct iscsi_conn *);
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struct cxgbit_device *cxgbit_find_device(struct net_device *, u8 *);
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/* DDP */
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int cxgbit_ddp_init(struct cxgbit_device *);
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int cxgbit_setup_conn_pgidx(struct cxgbit_sock *, u32);
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int cxgbit_reserve_ttt(struct cxgbit_sock *, struct iscsi_cmd *);
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void cxgbit_release_cmd(struct iscsi_conn *, struct iscsi_cmd *);
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static inline
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struct cxgbi_ppm *cdev2ppm(struct cxgbit_device *cdev)
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{
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return (struct cxgbi_ppm *)(*cdev->lldi.iscsi_ppm);
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}
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#endif /* __CXGBIT_H__ */
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