[linux-block.git] / drivers / crypto / chelsio / chtls / chtls.h

/*
 * Copyright (c) 2018 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 __CHTLS_H__
#define __CHTLS_H__

#include <crypto/aes.h>
#include <crypto/algapi.h>
#include <crypto/hash.h>
#include <crypto/sha.h>
#include <crypto/authenc.h>
#include <crypto/ctr.h>
#include <crypto/gf128mul.h>
#include <crypto/internal/aead.h>
#include <crypto/null.h>
#include <crypto/internal/skcipher.h>
#include <crypto/aead.h>
#include <crypto/scatterwalk.h>
#include <crypto/internal/hash.h>
#include <linux/tls.h>
#include <net/tls.h>

#include "t4fw_api.h"
#include "t4_msg.h"
#include "cxgb4.h"
#include "cxgb4_uld.h"
#include "l2t.h"
#include "chcr_algo.h"
#include "chcr_core.h"
#include "chcr_crypto.h"

#define MAX_IVS_PAGE			256
#define TLS_KEY_CONTEXT_SZ		64
#define CIPHER_BLOCK_SIZE		16
#define GCM_TAG_SIZE			16
#define KEY_ON_MEM_SZ			16
#define AEAD_EXPLICIT_DATA_SIZE		8
#define TLS_HEADER_LENGTH		5
#define SCMD_CIPH_MODE_AES_GCM		2
/* Any MFS size should work and come from openssl */
#define TLS_MFS				16384

#define RSS_HDR sizeof(struct rss_header)
#define TLS_WR_CPL_LEN \
	(sizeof(struct fw_tlstx_data_wr) + sizeof(struct cpl_tx_tls_sfo))

enum {
	CHTLS_KEY_CONTEXT_DSGL,
	CHTLS_KEY_CONTEXT_IMM,
	CHTLS_KEY_CONTEXT_DDR,
};

enum {
	CHTLS_LISTEN_START,
	CHTLS_LISTEN_STOP,
};

/* Flags for return value of CPL message handlers */
enum {
	CPL_RET_BUF_DONE =    1,   /* buffer processing done */
	CPL_RET_BAD_MSG =     2,   /* bad CPL message */
	CPL_RET_UNKNOWN_TID = 4    /* unexpected unknown TID */
};

#define LISTEN_INFO_HASH_SIZE 32
#define RSPQ_HASH_BITS 5
struct listen_info {
	struct listen_info *next;  /* Link to next entry */
	struct sock *sk;           /* The listening socket */
	unsigned int stid;         /* The server TID */
};

enum {
	T4_LISTEN_START_PENDING,
	T4_LISTEN_STARTED
};

enum csk_flags {
	CSK_CALLBACKS_CHKD,	/* socket callbacks have been sanitized */
	CSK_ABORT_REQ_RCVD,	/* received one ABORT_REQ_RSS message */
	CSK_TX_MORE_DATA,	/* sending ULP data; don't set SHOVE bit */
	CSK_TX_WAIT_IDLE,	/* suspend Tx until in-flight data is ACKed */
	CSK_ABORT_SHUTDOWN,	/* shouldn't send more abort requests */
	CSK_ABORT_RPL_PENDING,	/* expecting an abort reply */
	CSK_CLOSE_CON_REQUESTED,/* we've sent a close_conn_req */
	CSK_TX_DATA_SENT,	/* sent a TX_DATA WR on this connection */
	CSK_TX_FAILOVER,	/* Tx traffic failing over */
	CSK_UPDATE_RCV_WND,	/* Need to update rcv window */
	CSK_RST_ABORTED,	/* outgoing RST was aborted */
	CSK_TLS_HANDSHK,	/* TLS Handshake */
	CSK_CONN_INLINE,	/* Connection on HW */
};

enum chtls_cdev_state {
	CHTLS_CDEV_STATE_UP = 1
};

struct listen_ctx {
	struct sock *lsk;
	struct chtls_dev *cdev;
	struct sk_buff_head synq;
	u32 state;
};

struct key_map {
	unsigned long *addr;
	unsigned int start;
	unsigned int available;
	unsigned int size;
	spinlock_t lock; /* lock for key id request from map */
} __packed;

struct tls_scmd {
	u32 seqno_numivs;
	u32 ivgen_hdrlen;
};

struct chtls_dev {
	struct tls_device tlsdev;
	struct list_head list;
	struct cxgb4_lld_info *lldi;
	struct pci_dev *pdev;
	struct listen_info *listen_hash_tab[LISTEN_INFO_HASH_SIZE];
	spinlock_t listen_lock; /* lock for listen list */
	struct net_device **ports;
	struct tid_info *tids;
	unsigned int pfvf;
	const unsigned short *mtus;

	struct idr hwtid_idr;
	struct idr stid_idr;

	spinlock_t idr_lock ____cacheline_aligned_in_smp;

	struct net_device *egr_dev[NCHAN * 2];
	struct sk_buff *rspq_skb_cache[1 << RSPQ_HASH_BITS];
	struct sk_buff *askb;

	struct sk_buff_head deferq;
	struct work_struct deferq_task;

	struct list_head list_node;
	struct list_head rcu_node;
	struct list_head na_node;
	unsigned int send_page_order;
	int max_host_sndbuf;
	struct key_map kmap;
	unsigned int cdev_state;
};

struct chtls_hws {
	struct sk_buff_head sk_recv_queue;
	u8 txqid;
	u8 ofld;
	u16 type;
	u16 rstate;
	u16 keyrpl;
	u16 pldlen;
	u16 rcvpld;
	u16 compute;
	u16 expansion;
	u16 keylen;
	u16 pdus;
	u16 adjustlen;
	u16 ivsize;
	u16 txleft;
	u32 mfs;
	s32 txkey;
	s32 rxkey;
	u32 fcplenmax;
	u32 copied_seq;
	u64 tx_seq_no;
	struct tls_scmd scmd;
	struct tls12_crypto_info_aes_gcm_128 crypto_info;
};

struct chtls_sock {
	struct sock *sk;
	struct chtls_dev *cdev;
	struct l2t_entry *l2t_entry;    /* pointer to the L2T entry */
	struct net_device *egress_dev;  /* TX_CHAN for act open retry */

	struct sk_buff_head txq;
	struct sk_buff *wr_skb_head;
	struct sk_buff *wr_skb_tail;
	struct sk_buff *ctrl_skb_cache;
	struct sk_buff *txdata_skb_cache; /* abort path messages */
	struct kref kref;
	unsigned long flags;
	u32 opt2;
	u32 wr_credits;
	u32 wr_unacked;
	u32 wr_max_credits;
	u32 wr_nondata;
	u32 hwtid;               /* TCP Control Block ID */
	u32 txq_idx;
	u32 rss_qid;
	u32 tid;
	u32 idr;
	u32 mss;
	u32 ulp_mode;
	u32 tx_chan;
	u32 rx_chan;
	u32 sndbuf;
	u32 txplen_max;
	u32 mtu_idx;           /* MTU table index */
	u32 smac_idx;
	u8 port_id;
	u8 tos;
	u16 resv2;
	u32 delack_mode;
	u32 delack_seq;

	void *passive_reap_next;        /* placeholder for passive */
	struct chtls_hws tlshws;
	struct synq {
		struct sk_buff *next;
		struct sk_buff *prev;
	} synq;
	struct listen_ctx *listen_ctx;
};

struct tls_hdr {
	u8  type;
	u16 version;
	u16 length;
} __packed;

struct tlsrx_cmp_hdr {
	u8  type;
	u16 version;
	u16 length;

	u64 tls_seq;
	u16 reserved1;
	u8  res_to_mac_error;
} __packed;

/* res_to_mac_error fields */
#define TLSRX_HDR_PKT_INT_ERROR_S   4
#define TLSRX_HDR_PKT_INT_ERROR_M   0x1
#define TLSRX_HDR_PKT_INT_ERROR_V(x) \
	((x) << TLSRX_HDR_PKT_INT_ERROR_S)
#define TLSRX_HDR_PKT_INT_ERROR_G(x) \
	(((x) >> TLSRX_HDR_PKT_INT_ERROR_S) & TLSRX_HDR_PKT_INT_ERROR_M)
#define TLSRX_HDR_PKT_INT_ERROR_F   TLSRX_HDR_PKT_INT_ERROR_V(1U)

#define TLSRX_HDR_PKT_SPP_ERROR_S        3
#define TLSRX_HDR_PKT_SPP_ERROR_M        0x1
#define TLSRX_HDR_PKT_SPP_ERROR_V(x)     ((x) << TLSRX_HDR_PKT_SPP_ERROR)
#define TLSRX_HDR_PKT_SPP_ERROR_G(x)     \
	(((x) >> TLSRX_HDR_PKT_SPP_ERROR_S) & TLSRX_HDR_PKT_SPP_ERROR_M)
#define TLSRX_HDR_PKT_SPP_ERROR_F        TLSRX_HDR_PKT_SPP_ERROR_V(1U)

#define TLSRX_HDR_PKT_CCDX_ERROR_S       2
#define TLSRX_HDR_PKT_CCDX_ERROR_M       0x1
#define TLSRX_HDR_PKT_CCDX_ERROR_V(x)    ((x) << TLSRX_HDR_PKT_CCDX_ERROR_S)
#define TLSRX_HDR_PKT_CCDX_ERROR_G(x)    \
	(((x) >> TLSRX_HDR_PKT_CCDX_ERROR_S) & TLSRX_HDR_PKT_CCDX_ERROR_M)
#define TLSRX_HDR_PKT_CCDX_ERROR_F       TLSRX_HDR_PKT_CCDX_ERROR_V(1U)

#define TLSRX_HDR_PKT_PAD_ERROR_S        1
#define TLSRX_HDR_PKT_PAD_ERROR_M        0x1
#define TLSRX_HDR_PKT_PAD_ERROR_V(x)     ((x) << TLSRX_HDR_PKT_PAD_ERROR_S)
#define TLSRX_HDR_PKT_PAD_ERROR_G(x)     \
	(((x) >> TLSRX_HDR_PKT_PAD_ERROR_S) & TLSRX_HDR_PKT_PAD_ERROR_M)
#define TLSRX_HDR_PKT_PAD_ERROR_F        TLSRX_HDR_PKT_PAD_ERROR_V(1U)

#define TLSRX_HDR_PKT_MAC_ERROR_S        0
#define TLSRX_HDR_PKT_MAC_ERROR_M        0x1
#define TLSRX_HDR_PKT_MAC_ERROR_V(x)     ((x) << TLSRX_HDR_PKT_MAC_ERROR)
#define TLSRX_HDR_PKT_MAC_ERROR_G(x)     \
	(((x) >> S_TLSRX_HDR_PKT_MAC_ERROR_S) & TLSRX_HDR_PKT_MAC_ERROR_M)
#define TLSRX_HDR_PKT_MAC_ERROR_F        TLSRX_HDR_PKT_MAC_ERROR_V(1U)

#define TLSRX_HDR_PKT_ERROR_M           0x1F
#define CONTENT_TYPE_ERROR		0x7F

struct ulp_mem_rw {
	__be32 cmd;
	__be32 len16;             /* command length */
	__be32 dlen;              /* data length in 32-byte units */
	__be32 lock_addr;
};

struct tls_key_wr {
	__be32 op_to_compl;
	__be32 flowid_len16;
	__be32 ftid;
	u8   reneg_to_write_rx;
	u8   protocol;
	__be16 mfs;
};

struct tls_key_req {
	struct tls_key_wr wr;
	struct ulp_mem_rw req;
	struct ulptx_idata sc_imm;
};

/*
 * This lives in skb->cb and is used to chain WRs in a linked list.
 */
struct wr_skb_cb {
	struct l2t_skb_cb l2t;          /* reserve space for l2t CB */
	struct sk_buff *next_wr;        /* next write request */
};

/* Per-skb backlog handler.  Run when a socket's backlog is processed. */
struct blog_skb_cb {
	void (*backlog_rcv)(struct sock *sk, struct sk_buff *skb);
	struct chtls_dev *cdev;
};

/*
 * Similar to tcp_skb_cb but with ULP elements added to support TLS,
 * etc.
 */
struct ulp_skb_cb {
	struct wr_skb_cb wr;		/* reserve space for write request */
	u16 flags;			/* TCP-like flags */
	u8 psh;
	u8 ulp_mode;			/* ULP mode/submode of sk_buff */
	u32 seq;			/* TCP sequence number */
	union { /* ULP-specific fields */
		struct {
			u8  type;
			u8  ofld;
			u8  iv;
		} tls;
	} ulp;
};

#define ULP_SKB_CB(skb) ((struct ulp_skb_cb *)&((skb)->cb[0]))
#define BLOG_SKB_CB(skb) ((struct blog_skb_cb *)(skb)->cb)

/*
 * Flags for ulp_skb_cb.flags.
 */
enum {
	ULPCB_FLAG_NEED_HDR  = 1 << 0,	/* packet needs a TX_DATA_WR header */
	ULPCB_FLAG_NO_APPEND = 1 << 1,	/* don't grow this skb */
	ULPCB_FLAG_BARRIER   = 1 << 2,	/* set TX_WAIT_IDLE after sending */
	ULPCB_FLAG_HOLD      = 1 << 3,	/* skb not ready for Tx yet */
	ULPCB_FLAG_COMPL     = 1 << 4,	/* request WR completion */
	ULPCB_FLAG_URG       = 1 << 5,	/* urgent data */
	ULPCB_FLAG_TLS_HDR   = 1 << 6,  /* payload with tls hdr */
	ULPCB_FLAG_NO_HDR    = 1 << 7,  /* not a ofld wr */
};

/* The ULP mode/submode of an skbuff */
#define skb_ulp_mode(skb)  (ULP_SKB_CB(skb)->ulp_mode)
#define TCP_PAGE(sk)   (sk->sk_frag.page)
#define TCP_OFF(sk)    (sk->sk_frag.offset)

static inline struct chtls_dev *to_chtls_dev(struct tls_device *tlsdev)
{
	return container_of(tlsdev, struct chtls_dev, tlsdev);
}

static inline void csk_set_flag(struct chtls_sock *csk,
				enum csk_flags flag)
{
	__set_bit(flag, &csk->flags);
}

static inline void csk_reset_flag(struct chtls_sock *csk,
				  enum csk_flags flag)
{
	__clear_bit(flag, &csk->flags);
}

static inline bool csk_conn_inline(const struct chtls_sock *csk)
{
	return test_bit(CSK_CONN_INLINE, &csk->flags);
}

static inline int csk_flag(const struct sock *sk, enum csk_flags flag)
{
	struct chtls_sock *csk = rcu_dereference_sk_user_data(sk);

	if (!csk_conn_inline(csk))
		return 0;
	return test_bit(flag, &csk->flags);
}

static inline int csk_flag_nochk(const struct chtls_sock *csk,
				 enum csk_flags flag)
{
	return test_bit(flag, &csk->flags);
}

static inline void *cplhdr(struct sk_buff *skb)
{
	return skb->data;
}

static inline int is_neg_adv(unsigned int status)
{
	return status == CPL_ERR_RTX_NEG_ADVICE ||
	       status == CPL_ERR_KEEPALV_NEG_ADVICE ||
	       status == CPL_ERR_PERSIST_NEG_ADVICE;
}

static inline void process_cpl_msg(void (*fn)(struct sock *, struct sk_buff *),
				   struct sock *sk,
				   struct sk_buff *skb)
{
	skb_reset_mac_header(skb);
	skb_reset_network_header(skb);
	skb_reset_transport_header(skb);

	bh_lock_sock(sk);
	if (unlikely(sock_owned_by_user(sk))) {
		BLOG_SKB_CB(skb)->backlog_rcv = fn;
		__sk_add_backlog(sk, skb);
	} else {
		fn(sk, skb);
	}
	bh_unlock_sock(sk);
}

static inline void chtls_sock_free(struct kref *ref)
{
	struct chtls_sock *csk = container_of(ref, struct chtls_sock,
					      kref);
	kfree(csk);
}

static inline void __chtls_sock_put(const char *fn, struct chtls_sock *csk)
{
	kref_put(&csk->kref, chtls_sock_free);
}

static inline void __chtls_sock_get(const char *fn,
				    struct chtls_sock *csk)
{
	kref_get(&csk->kref);
}

static inline void send_or_defer(struct sock *sk, struct tcp_sock *tp,
				 struct sk_buff *skb, int through_l2t)
{
	struct chtls_sock *csk = rcu_dereference_sk_user_data(sk);

	if (through_l2t) {
		/* send through L2T */
		cxgb4_l2t_send(csk->egress_dev, skb, csk->l2t_entry);
	} else {
		/* send directly */
		cxgb4_ofld_send(csk->egress_dev, skb);
	}
}

typedef int (*chtls_handler_func)(struct chtls_dev *, struct sk_buff *);
extern chtls_handler_func chtls_handlers[NUM_CPL_CMDS];
void chtls_install_cpl_ops(struct sock *sk);
int chtls_init_kmap(struct chtls_dev *cdev, struct cxgb4_lld_info *lldi);
void chtls_listen_stop(struct chtls_dev *cdev, struct sock *sk);
int chtls_listen_start(struct chtls_dev *cdev, struct sock *sk);
void chtls_close(struct sock *sk, long timeout);
int chtls_disconnect(struct sock *sk, int flags);
void chtls_shutdown(struct sock *sk, int how);
void chtls_destroy_sock(struct sock *sk);
int chtls_sendmsg(struct sock *sk, struct msghdr *msg, size_t size);
int chtls_recvmsg(struct sock *sk, struct msghdr *msg,
		  size_t len, int nonblock, int flags, int *addr_len);
int chtls_sendpage(struct sock *sk, struct page *page,
		   int offset, size_t size, int flags);
int send_tx_flowc_wr(struct sock *sk, int compl,
		     u32 snd_nxt, u32 rcv_nxt);
void chtls_tcp_push(struct sock *sk, int flags);
int chtls_push_frames(struct chtls_sock *csk, int comp);
int chtls_set_tcb_tflag(struct sock *sk, unsigned int bit_pos, int val);
int chtls_setkey(struct chtls_sock *csk, u32 keylen, u32 mode);
void skb_entail(struct sock *sk, struct sk_buff *skb, int flags);
unsigned int keyid_to_addr(int start_addr, int keyid);
void free_tls_keyid(struct sock *sk);
#endif
Commit	Line	Data
a6779341 AG	1	/*
	2	* Copyright (c) 2018 Chelsio Communications, Inc.
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License version 2 as
	6	* published by the Free Software Foundation.
	7	*/
	8
	9	#ifndef __CHTLS_H__
	10	#define __CHTLS_H__
	11
	12	#include <crypto/aes.h>
	13	#include <crypto/algapi.h>
	14	#include <crypto/hash.h>
	15	#include <crypto/sha.h>
	16	#include <crypto/authenc.h>
	17	#include <crypto/ctr.h>
	18	#include <crypto/gf128mul.h>
	19	#include <crypto/internal/aead.h>
	20	#include <crypto/null.h>
	21	#include <crypto/internal/skcipher.h>
	22	#include <crypto/aead.h>
	23	#include <crypto/scatterwalk.h>
	24	#include <crypto/internal/hash.h>
	25	#include <linux/tls.h>
	26	#include <net/tls.h>
	27
	28	#include "t4fw_api.h"
	29	#include "t4_msg.h"
	30	#include "cxgb4.h"
	31	#include "cxgb4_uld.h"
	32	#include "l2t.h"
	33	#include "chcr_algo.h"
	34	#include "chcr_core.h"
	35	#include "chcr_crypto.h"
	36
	37	#define MAX_IVS_PAGE 256
	38	#define TLS_KEY_CONTEXT_SZ 64
	39	#define CIPHER_BLOCK_SIZE 16
	40	#define GCM_TAG_SIZE 16
	41	#define KEY_ON_MEM_SZ 16
	42	#define AEAD_EXPLICIT_DATA_SIZE 8
	43	#define TLS_HEADER_LENGTH 5
	44	#define SCMD_CIPH_MODE_AES_GCM 2
	45	/* Any MFS size should work and come from openssl */
	46	#define TLS_MFS 16384
	47
	48	#define RSS_HDR sizeof(struct rss_header)
	49	#define TLS_WR_CPL_LEN \
	50	(sizeof(struct fw_tlstx_data_wr) + sizeof(struct cpl_tx_tls_sfo))
	51
	52	enum {
	53	CHTLS_KEY_CONTEXT_DSGL,
	54	CHTLS_KEY_CONTEXT_IMM,
	55	CHTLS_KEY_CONTEXT_DDR,
	56	};
	57
	58	enum {
	59	CHTLS_LISTEN_START,
	60	CHTLS_LISTEN_STOP,
	61	};
	62
	63	/* Flags for return value of CPL message handlers */
	64	enum {
65	CPL_RET_BUF_DONE = 1, /* buffer processing done */
66	CPL_RET_BAD_MSG = 2, /* bad CPL message */
67	CPL_RET_UNKNOWN_TID = 4 /* unexpected unknown TID */
68	};
69
a6779341 AG	70	#define LISTEN_INFO_HASH_SIZE 32
	71	#define RSPQ_HASH_BITS 5
	72	struct listen_info {
	73	struct listen_info next; / Link to next entry */
	74	struct sock sk; / The listening socket */
	75	unsigned int stid; /* The server TID */
	76	};
	77
	78	enum {
	79	T4_LISTEN_START_PENDING,
	80	T4_LISTEN_STARTED
	81	};
	82
	83	enum csk_flags {
	84	CSK_CALLBACKS_CHKD, /* socket callbacks have been sanitized */
	85	CSK_ABORT_REQ_RCVD, /* received one ABORT_REQ_RSS message */
	86	CSK_TX_MORE_DATA, /* sending ULP data; don't set SHOVE bit */
	87	CSK_TX_WAIT_IDLE, /* suspend Tx until in-flight data is ACKed */
	88	CSK_ABORT_SHUTDOWN, /* shouldn't send more abort requests */
	89	CSK_ABORT_RPL_PENDING, /* expecting an abort reply */
	90	CSK_CLOSE_CON_REQUESTED,/* we've sent a close_conn_req */
	91	CSK_TX_DATA_SENT, /* sent a TX_DATA WR on this connection */
	92	CSK_TX_FAILOVER, /* Tx traffic failing over */
	93	CSK_UPDATE_RCV_WND, /* Need to update rcv window */
	94	CSK_RST_ABORTED, /* outgoing RST was aborted */
	95	CSK_TLS_HANDSHK, /* TLS Handshake */
	96	CSK_CONN_INLINE, /* Connection on HW */
	97	};
	98
65b2c12d GG	99	enum chtls_cdev_state {
	100	CHTLS_CDEV_STATE_UP = 1
	101	};
	102
a6779341 AG	103	struct listen_ctx {
	104	struct sock *lsk;
	105	struct chtls_dev *cdev;
	106	struct sk_buff_head synq;
	107	u32 state;
	108	};
	109
	110	struct key_map {
	111	unsigned long *addr;
	112	unsigned int start;
	113	unsigned int available;
	114	unsigned int size;
	115	spinlock_t lock; /* lock for key id request from map */
	116	} __packed;
	117
	118	struct tls_scmd {
	119	u32 seqno_numivs;
	120	u32 ivgen_hdrlen;
	121	};
	122
	123	struct chtls_dev {
	124	struct tls_device tlsdev;
	125	struct list_head list;
	126	struct cxgb4_lld_info *lldi;
	127	struct pci_dev *pdev;
	128	struct listen_info *listen_hash_tab[LISTEN_INFO_HASH_SIZE];
	129	spinlock_t listen_lock; /* lock for listen list */
	130	struct net_device **ports;
	131	struct tid_info *tids;
	132	unsigned int pfvf;
	133	const unsigned short *mtus;
	134
	135	struct idr hwtid_idr;
	136	struct idr stid_idr;
	137
	138	spinlock_t idr_lock ____cacheline_aligned_in_smp;
	139
	140	struct net_device egr_dev[NCHAN 2];
	141	struct sk_buff *rspq_skb_cache[1 << RSPQ_HASH_BITS];
	142	struct sk_buff *askb;
	143
	144	struct sk_buff_head deferq;
	145	struct work_struct deferq_task;
	146
	147	struct list_head list_node;
	148	struct list_head rcu_node;
	149	struct list_head na_node;
	150	unsigned int send_page_order;
3b8305f5	151	int max_host_sndbuf;
a6779341	152	struct key_map kmap;
65b2c12d	153	unsigned int cdev_state;
a6779341 AG	154	};
	155
	156	struct chtls_hws {
	157	struct sk_buff_head sk_recv_queue;
	158	u8 txqid;
	159	u8 ofld;
	160	u16 type;
	161	u16 rstate;
	162	u16 keyrpl;
	163	u16 pldlen;
	164	u16 rcvpld;
	165	u16 compute;
	166	u16 expansion;
	167	u16 keylen;
	168	u16 pdus;
	169	u16 adjustlen;
	170	u16 ivsize;
	171	u16 txleft;
	172	u32 mfs;
	173	s32 txkey;
	174	s32 rxkey;
	175	u32 fcplenmax;
	176	u32 copied_seq;
	177	u64 tx_seq_no;
	178	struct tls_scmd scmd;
	179	struct tls12_crypto_info_aes_gcm_128 crypto_info;
	180	};
	181
	182	struct chtls_sock {
	183	struct sock *sk;
	184	struct chtls_dev *cdev;
	185	struct l2t_entry l2t_entry; / pointer to the L2T entry */
	186	struct net_device egress_dev; / TX_CHAN for act open retry */
	187
	188	struct sk_buff_head txq;
	189	struct sk_buff *wr_skb_head;
	190	struct sk_buff *wr_skb_tail;
	191	struct sk_buff *ctrl_skb_cache;
	192	struct sk_buff txdata_skb_cache; / abort path messages */
	193	struct kref kref;
	194	unsigned long flags;
	195	u32 opt2;
	196	u32 wr_credits;
	197	u32 wr_unacked;
	198	u32 wr_max_credits;
	199	u32 wr_nondata;
	200	u32 hwtid; /* TCP Control Block ID */
	201	u32 txq_idx;
	202	u32 rss_qid;
	203	u32 tid;
	204	u32 idr;
	205	u32 mss;
	206	u32 ulp_mode;
	207	u32 tx_chan;
	208	u32 rx_chan;
	209	u32 sndbuf;
	210	u32 txplen_max;
	211	u32 mtu_idx; /* MTU table index */
	212	u32 smac_idx;
	213	u8 port_id;
	214	u8 tos;
	215	u16 resv2;
	216	u32 delack_mode;
	217	u32 delack_seq;
218
219	void passive_reap_next; / placeholder for passive */
220	struct chtls_hws tlshws;
221	struct synq {
222	struct sk_buff *next;
223	struct sk_buff *prev;
224	} synq;
225	struct listen_ctx *listen_ctx;
226	};
227
228	struct tls_hdr {
229	u8 type;
230	u16 version;
231	u16 length;
232	} __packed;
233
234	struct tlsrx_cmp_hdr {
235	u8 type;
236	u16 version;
237	u16 length;
238
239	u64 tls_seq;
240	u16 reserved1;
241	u8 res_to_mac_error;
242	} __packed;
243
244	/* res_to_mac_error fields */
245	#define TLSRX_HDR_PKT_INT_ERROR_S 4
246	#define TLSRX_HDR_PKT_INT_ERROR_M 0x1
247	#define TLSRX_HDR_PKT_INT_ERROR_V(x) \
248	((x) << TLSRX_HDR_PKT_INT_ERROR_S)
249	#define TLSRX_HDR_PKT_INT_ERROR_G(x) \
250	(((x) >> TLSRX_HDR_PKT_INT_ERROR_S) & TLSRX_HDR_PKT_INT_ERROR_M)
251	#define TLSRX_HDR_PKT_INT_ERROR_F TLSRX_HDR_PKT_INT_ERROR_V(1U)
252
253	#define TLSRX_HDR_PKT_SPP_ERROR_S 3
254	#define TLSRX_HDR_PKT_SPP_ERROR_M 0x1
255	#define TLSRX_HDR_PKT_SPP_ERROR_V(x) ((x) << TLSRX_HDR_PKT_SPP_ERROR)
256	#define TLSRX_HDR_PKT_SPP_ERROR_G(x) \
257	(((x) >> TLSRX_HDR_PKT_SPP_ERROR_S) & TLSRX_HDR_PKT_SPP_ERROR_M)
258	#define TLSRX_HDR_PKT_SPP_ERROR_F TLSRX_HDR_PKT_SPP_ERROR_V(1U)
259
260	#define TLSRX_HDR_PKT_CCDX_ERROR_S 2
261	#define TLSRX_HDR_PKT_CCDX_ERROR_M 0x1
262	#define TLSRX_HDR_PKT_CCDX_ERROR_V(x) ((x) << TLSRX_HDR_PKT_CCDX_ERROR_S)
263	#define TLSRX_HDR_PKT_CCDX_ERROR_G(x) \
264	(((x) >> TLSRX_HDR_PKT_CCDX_ERROR_S) & TLSRX_HDR_PKT_CCDX_ERROR_M)
265	#define TLSRX_HDR_PKT_CCDX_ERROR_F TLSRX_HDR_PKT_CCDX_ERROR_V(1U)
266
267	#define TLSRX_HDR_PKT_PAD_ERROR_S 1
268	#define TLSRX_HDR_PKT_PAD_ERROR_M 0x1
269	#define TLSRX_HDR_PKT_PAD_ERROR_V(x) ((x) << TLSRX_HDR_PKT_PAD_ERROR_S)
270	#define TLSRX_HDR_PKT_PAD_ERROR_G(x) \
271	(((x) >> TLSRX_HDR_PKT_PAD_ERROR_S) & TLSRX_HDR_PKT_PAD_ERROR_M)
272	#define TLSRX_HDR_PKT_PAD_ERROR_F TLSRX_HDR_PKT_PAD_ERROR_V(1U)
273
274	#define TLSRX_HDR_PKT_MAC_ERROR_S 0
275	#define TLSRX_HDR_PKT_MAC_ERROR_M 0x1
276	#define TLSRX_HDR_PKT_MAC_ERROR_V(x) ((x) << TLSRX_HDR_PKT_MAC_ERROR)
277	#define TLSRX_HDR_PKT_MAC_ERROR_G(x) \
278	(((x) >> S_TLSRX_HDR_PKT_MAC_ERROR_S) & TLSRX_HDR_PKT_MAC_ERROR_M)
279	#define TLSRX_HDR_PKT_MAC_ERROR_F TLSRX_HDR_PKT_MAC_ERROR_V(1U)
280
281	#define TLSRX_HDR_PKT_ERROR_M 0x1F
17a7d24a	282	#define CONTENT_TYPE_ERROR 0x7F
a6779341 AG	283
	284	struct ulp_mem_rw {
	285	__be32 cmd;
	286	__be32 len16; /* command length */
	287	__be32 dlen; /* data length in 32-byte units */
	288	__be32 lock_addr;
	289	};
	290
	291	struct tls_key_wr {
	292	__be32 op_to_compl;
	293	__be32 flowid_len16;
	294	__be32 ftid;
	295	u8 reneg_to_write_rx;
	296	u8 protocol;
	297	__be16 mfs;
	298	};
	299
	300	struct tls_key_req {
	301	struct tls_key_wr wr;
	302	struct ulp_mem_rw req;
	303	struct ulptx_idata sc_imm;
	304	};
	305
	306	/*
	307	* This lives in skb->cb and is used to chain WRs in a linked list.
	308	*/
	309	struct wr_skb_cb {
	310	struct l2t_skb_cb l2t; /* reserve space for l2t CB */
	311	struct sk_buff next_wr; / next write request */
	312	};
	313
	314	/* Per-skb backlog handler. Run when a socket's backlog is processed. */
	315	struct blog_skb_cb {
	316	void (backlog_rcv)(struct sock sk, struct sk_buff *skb);
	317	struct chtls_dev *cdev;
	318	};
	319
	320	/*
	321	* Similar to tcp_skb_cb but with ULP elements added to support TLS,
	322	* etc.
	323	*/
	324	struct ulp_skb_cb {
	325	struct wr_skb_cb wr; /* reserve space for write request */
	326	u16 flags; /* TCP-like flags */
	327	u8 psh;
	328	u8 ulp_mode; /* ULP mode/submode of sk_buff */
	329	u32 seq; /* TCP sequence number */
	330	union { /* ULP-specific fields */
	331	struct {
	332	u8 type;
	333	u8 ofld;
	334	u8 iv;
	335	} tls;
	336	} ulp;
	337	};
	338
	339	#define ULP_SKB_CB(skb) ((struct ulp_skb_cb *)&((skb)->cb[0]))
	340	#define BLOG_SKB_CB(skb) ((struct blog_skb_cb *)(skb)->cb)
	341
	342	/*
	343	* Flags for ulp_skb_cb.flags.
	344	*/
	345	enum {
	346	ULPCB_FLAG_NEED_HDR = 1 << 0, /* packet needs a TX_DATA_WR header */
347	ULPCB_FLAG_NO_APPEND = 1 << 1, /* don't grow this skb */
348	ULPCB_FLAG_BARRIER = 1 << 2, /* set TX_WAIT_IDLE after sending */
349	ULPCB_FLAG_HOLD = 1 << 3, /* skb not ready for Tx yet */
350	ULPCB_FLAG_COMPL = 1 << 4, /* request WR completion */
351	ULPCB_FLAG_URG = 1 << 5, /* urgent data */
17a7d24a AG	352	ULPCB_FLAG_TLS_HDR = 1 << 6, /* payload with tls hdr */
17a7d24a AG	353	ULPCB_FLAG_NO_HDR = 1 << 7, /* not a ofld wr */
a6779341 AG	354	};
	355
	356	/* The ULP mode/submode of an skbuff */
	357	#define skb_ulp_mode(skb) (ULP_SKB_CB(skb)->ulp_mode)
	358	#define TCP_PAGE(sk) (sk->sk_frag.page)
	359	#define TCP_OFF(sk) (sk->sk_frag.offset)
	360
	361	static inline struct chtls_dev to_chtls_dev(struct tls_device tlsdev)
	362	{
	363	return container_of(tlsdev, struct chtls_dev, tlsdev);
	364	}
	365
	366	static inline void csk_set_flag(struct chtls_sock *csk,
	367	enum csk_flags flag)
	368	{
	369	__set_bit(flag, &csk->flags);
	370	}
	371
	372	static inline void csk_reset_flag(struct chtls_sock *csk,
	373	enum csk_flags flag)
	374	{
	375	__clear_bit(flag, &csk->flags);
	376	}
	377
	378	static inline bool csk_conn_inline(const struct chtls_sock *csk)
	379	{
	380	return test_bit(CSK_CONN_INLINE, &csk->flags);
	381	}
	382
	383	static inline int csk_flag(const struct sock *sk, enum csk_flags flag)
	384	{
	385	struct chtls_sock *csk = rcu_dereference_sk_user_data(sk);
	386
	387	if (!csk_conn_inline(csk))
	388	return 0;
	389	return test_bit(flag, &csk->flags);
	390	}
	391
	392	static inline int csk_flag_nochk(const struct chtls_sock *csk,
	393	enum csk_flags flag)
	394	{
	395	return test_bit(flag, &csk->flags);
	396	}
	397
	398	static inline void cplhdr(struct sk_buff skb)
	399	{
	400	return skb->data;
	401	}
	402
	403	static inline int is_neg_adv(unsigned int status)
	404	{
	405	return status == CPL_ERR_RTX_NEG_ADVICE \|\|
	406	status == CPL_ERR_KEEPALV_NEG_ADVICE \|\|
	407	status == CPL_ERR_PERSIST_NEG_ADVICE;
	408	}
	409
	410	static inline void process_cpl_msg(void (fn)(struct sock , struct sk_buff *),
	411	struct sock *sk,
	412	struct sk_buff *skb)
	413	{
	414	skb_reset_mac_header(skb);
	415	skb_reset_network_header(skb);
	416	skb_reset_transport_header(skb);
	417
418	bh_lock_sock(sk);
419	if (unlikely(sock_owned_by_user(sk))) {
420	BLOG_SKB_CB(skb)->backlog_rcv = fn;
421	__sk_add_backlog(sk, skb);
422	} else {
423	fn(sk, skb);
424	}
425	bh_unlock_sock(sk);
426	}
427
428	static inline void chtls_sock_free(struct kref *ref)
429	{
430	struct chtls_sock *csk = container_of(ref, struct chtls_sock,
431	kref);
432	kfree(csk);
433	}
434
435	static inline void __chtls_sock_put(const char fn, struct chtls_sock csk)
436	{
437	kref_put(&csk->kref, chtls_sock_free);
438	}
439
440	static inline void __chtls_sock_get(const char *fn,
441	struct chtls_sock *csk)
442	{
443	kref_get(&csk->kref);
444	}
445
446	static inline void send_or_defer(struct sock sk, struct tcp_sock tp,
447	struct sk_buff *skb, int through_l2t)
448	{
449	struct chtls_sock *csk = rcu_dereference_sk_user_data(sk);
450
451	if (through_l2t) {
452	/* send through L2T */
453	cxgb4_l2t_send(csk->egress_dev, skb, csk->l2t_entry);
454	} else {
455	/* send directly */
456	cxgb4_ofld_send(csk->egress_dev, skb);
457	}
458	}
459
460	typedef int (chtls_handler_func)(struct chtls_dev , struct sk_buff *);
461	extern chtls_handler_func chtls_handlers[NUM_CPL_CMDS];
462	void chtls_install_cpl_ops(struct sock *sk);
463	int chtls_init_kmap(struct chtls_dev cdev, struct cxgb4_lld_info lldi);
464	void chtls_listen_stop(struct chtls_dev cdev, struct sock sk);
465	int chtls_listen_start(struct chtls_dev cdev, struct sock sk);
466	void chtls_close(struct sock *sk, long timeout);
467	int chtls_disconnect(struct sock *sk, int flags);
468	void chtls_shutdown(struct sock *sk, int how);
469	void chtls_destroy_sock(struct sock *sk);
470	int chtls_sendmsg(struct sock sk, struct msghdr msg, size_t size);
471	int chtls_recvmsg(struct sock sk, struct msghdr msg,
472	size_t len, int nonblock, int flags, int *addr_len);
473	int chtls_sendpage(struct sock sk, struct page page,
474	int offset, size_t size, int flags);
475	int send_tx_flowc_wr(struct sock *sk, int compl,
476	u32 snd_nxt, u32 rcv_nxt);
477	void chtls_tcp_push(struct sock *sk, int flags);
478	int chtls_push_frames(struct chtls_sock *csk, int comp);
479	int chtls_set_tcb_tflag(struct sock *sk, unsigned int bit_pos, int val);
480	int chtls_setkey(struct chtls_sock *csk, u32 keylen, u32 mode);
481	void skb_entail(struct sock sk, struct sk_buff skb, int flags);
482	unsigned int keyid_to_addr(int start_addr, int keyid);
483	void free_tls_keyid(struct sock *sk);
484	#endif