cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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tcm_fc.h (4287B)

      1/* SPDX-License-Identifier: GPL-2.0-only */
      2/*
      3 * Copyright (c) 2010 Cisco Systems, Inc.
      4 */
      5#ifndef __TCM_FC_H__
      6#define __TCM_FC_H__
      7
      8#include <linux/types.h>
      9#include <target/target_core_base.h>
     10
     11#define FT_VERSION "0.4"
     12
     13#define FT_NAMELEN 32		/* length of ASCII WWPNs including pad */
     14#define FT_TPG_NAMELEN 32	/* max length of TPG name */
     15#define FT_LUN_NAMELEN 32	/* max length of LUN name */
     16#define TCM_FC_DEFAULT_TAGS 512	/* tags used for per-session preallocation */
     17
     18struct ft_transport_id {
     19	__u8	format;
     20	__u8	__resvd1[7];
     21	__u8	wwpn[8];
     22	__u8	__resvd2[8];
     23} __attribute__((__packed__));
     24
     25/*
     26 * Session (remote port).
     27 */
     28struct ft_sess {
     29	u32 port_id;			/* for hash lookup use only */
     30	u32 params;
     31	u16 max_frame;			/* maximum frame size */
     32	u64 port_name;			/* port name for transport ID */
     33	struct ft_tport *tport;
     34	struct se_session *se_sess;
     35	struct hlist_node hash;		/* linkage in ft_sess_hash table */
     36	struct rcu_head rcu;
     37	struct kref kref;		/* ref for hash and outstanding I/Os */
     38};
     39
     40/*
     41 * Hash table of sessions per local port.
     42 * Hash lookup by remote port FC_ID.
     43 */
     44#define	FT_SESS_HASH_BITS	6
     45#define	FT_SESS_HASH_SIZE	(1 << FT_SESS_HASH_BITS)
     46
     47/*
     48 * Per local port data.
     49 * This is created only after a TPG exists that allows target function
     50 * for the local port.  If the TPG exists, this is allocated when
     51 * we're notified that the local port has been created, or when
     52 * the first PRLI provider callback is received.
     53 */
     54struct ft_tport {
     55	struct fc_lport *lport;
     56	struct ft_tpg *tpg;		/* NULL if TPG deleted before tport */
     57	u32	sess_count;		/* number of sessions in hash */
     58	struct rcu_head rcu;
     59	struct hlist_head hash[FT_SESS_HASH_SIZE];	/* list of sessions */
     60};
     61
     62/*
     63 * Node ID and authentication.
     64 */
     65struct ft_node_auth {
     66	u64	port_name;
     67	u64	node_name;
     68};
     69
     70/*
     71 * Node ACL for FC remote port session.
     72 */
     73struct ft_node_acl {
     74	struct se_node_acl se_node_acl;
     75	struct ft_node_auth node_auth;
     76};
     77
     78struct ft_lun {
     79	u32 index;
     80	char name[FT_LUN_NAMELEN];
     81};
     82
     83/*
     84 * Target portal group (local port).
     85 */
     86struct ft_tpg {
     87	u32 index;
     88	struct ft_lport_wwn *lport_wwn;
     89	struct ft_tport *tport;		/* active tport or NULL */
     90	struct list_head lun_list;	/* head of LUNs */
     91	struct se_portal_group se_tpg;
     92	struct workqueue_struct *workqueue;
     93};
     94
     95struct ft_lport_wwn {
     96	u64 wwpn;
     97	char name[FT_NAMELEN];
     98	struct list_head ft_wwn_node;
     99	struct ft_tpg *tpg;
    100	struct se_wwn se_wwn;
    101};
    102
    103/*
    104 * Commands
    105 */
    106struct ft_cmd {
    107	struct ft_sess *sess;		/* session held for cmd */
    108	struct fc_seq *seq;		/* sequence in exchange mgr */
    109	struct se_cmd se_cmd;		/* Local TCM I/O descriptor */
    110	struct fc_frame *req_frame;
    111	u32 write_data_len;		/* data received on writes */
    112	struct work_struct work;
    113	/* Local sense buffer */
    114	unsigned char ft_sense_buffer[TRANSPORT_SENSE_BUFFER];
    115	u32 was_ddp_setup:1;		/* Set only if ddp is setup */
    116	u32 aborted:1;			/* Set if aborted by reset or timeout */
    117	struct scatterlist *sg;		/* Set only if DDP is setup */
    118	u32 sg_cnt;			/* No. of item in scatterlist */
    119};
    120
    121extern struct mutex ft_lport_lock;
    122extern struct fc4_prov ft_prov;
    123extern unsigned int ft_debug_logging;
    124
    125/*
    126 * Fabric methods.
    127 */
    128
    129/*
    130 * Session ops.
    131 */
    132void ft_sess_put(struct ft_sess *);
    133void ft_sess_close(struct se_session *);
    134u32 ft_sess_get_index(struct se_session *);
    135u32 ft_sess_get_port_name(struct se_session *, unsigned char *, u32);
    136
    137void ft_lport_add(struct fc_lport *, void *);
    138void ft_lport_del(struct fc_lport *, void *);
    139int ft_lport_notify(struct notifier_block *, unsigned long, void *);
    140
    141/*
    142 * IO methods.
    143 */
    144int ft_check_stop_free(struct se_cmd *);
    145void ft_release_cmd(struct se_cmd *);
    146int ft_queue_status(struct se_cmd *);
    147int ft_queue_data_in(struct se_cmd *);
    148int ft_write_pending(struct se_cmd *);
    149int ft_get_cmd_state(struct se_cmd *);
    150void ft_queue_tm_resp(struct se_cmd *);
    151void ft_aborted_task(struct se_cmd *);
    152
    153/*
    154 * other internal functions.
    155 */
    156void ft_recv_req(struct ft_sess *, struct fc_frame *);
    157struct ft_tpg *ft_lport_find_tpg(struct fc_lport *);
    158
    159void ft_recv_write_data(struct ft_cmd *, struct fc_frame *);
    160void ft_dump_cmd(struct ft_cmd *, const char *caller);
    161
    162ssize_t ft_format_wwn(char *, size_t, u64);
    163
    164/*
    165 * Underlying HW specific helper function
    166 */
    167void ft_invl_hw_context(struct ft_cmd *);
    168
    169#endif /* __TCM_FC_H__ */