[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 */
};

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;
	struct key_map kmap;
};

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
	99	struct listen_ctx {
	100	struct sock *lsk;
	101	struct chtls_dev *cdev;
	102	struct sk_buff_head synq;
	103	u32 state;
	104	};
	105
	106	struct key_map {
	107	unsigned long *addr;
	108	unsigned int start;
	109	unsigned int available;
	110	unsigned int size;
	111	spinlock_t lock; /* lock for key id request from map */
	112	} __packed;
	113
	114	struct tls_scmd {
	115	u32 seqno_numivs;
	116	u32 ivgen_hdrlen;
	117	};
	118
	119	struct chtls_dev {
	120	struct tls_device tlsdev;
	121	struct list_head list;
	122	struct cxgb4_lld_info *lldi;
	123	struct pci_dev *pdev;
	124	struct listen_info *listen_hash_tab[LISTEN_INFO_HASH_SIZE];
	125	spinlock_t listen_lock; /* lock for listen list */
	126	struct net_device **ports;
	127	struct tid_info *tids;
	128	unsigned int pfvf;
	129	const unsigned short *mtus;
	130
	131	struct idr hwtid_idr;
	132	struct idr stid_idr;
	133
134	spinlock_t idr_lock ____cacheline_aligned_in_smp;
135
136	struct net_device egr_dev[NCHAN 2];
137	struct sk_buff *rspq_skb_cache[1 << RSPQ_HASH_BITS];
138	struct sk_buff *askb;
139
140	struct sk_buff_head deferq;
141	struct work_struct deferq_task;
142
143	struct list_head list_node;
144	struct list_head rcu_node;
145	struct list_head na_node;
146	unsigned int send_page_order;
147	struct key_map kmap;
148	};
149
150	struct chtls_hws {
151	struct sk_buff_head sk_recv_queue;
152	u8 txqid;
153	u8 ofld;
154	u16 type;
155	u16 rstate;
156	u16 keyrpl;
157	u16 pldlen;
158	u16 rcvpld;
159	u16 compute;
160	u16 expansion;
161	u16 keylen;
162	u16 pdus;
163	u16 adjustlen;
164	u16 ivsize;
165	u16 txleft;
166	u32 mfs;
167	s32 txkey;
168	s32 rxkey;
169	u32 fcplenmax;
170	u32 copied_seq;
171	u64 tx_seq_no;
172	struct tls_scmd scmd;
173	struct tls12_crypto_info_aes_gcm_128 crypto_info;
174	};
175
176	struct chtls_sock {
177	struct sock *sk;
178	struct chtls_dev *cdev;
179	struct l2t_entry l2t_entry; / pointer to the L2T entry */
180	struct net_device egress_dev; / TX_CHAN for act open retry */
181
182	struct sk_buff_head txq;
183	struct sk_buff *wr_skb_head;
184	struct sk_buff *wr_skb_tail;
185	struct sk_buff *ctrl_skb_cache;
186	struct sk_buff txdata_skb_cache; / abort path messages */
187	struct kref kref;
188	unsigned long flags;
189	u32 opt2;
190	u32 wr_credits;
191	u32 wr_unacked;
192	u32 wr_max_credits;
193	u32 wr_nondata;
194	u32 hwtid; /* TCP Control Block ID */
195	u32 txq_idx;
196	u32 rss_qid;
197	u32 tid;
198	u32 idr;
199	u32 mss;
200	u32 ulp_mode;
201	u32 tx_chan;
202	u32 rx_chan;
203	u32 sndbuf;
204	u32 txplen_max;
205	u32 mtu_idx; /* MTU table index */
206	u32 smac_idx;
207	u8 port_id;
208	u8 tos;
209	u16 resv2;
210	u32 delack_mode;
211	u32 delack_seq;
212
213	void passive_reap_next; / placeholder for passive */
214	struct chtls_hws tlshws;
215	struct synq {
216	struct sk_buff *next;
217	struct sk_buff *prev;
218	} synq;
219	struct listen_ctx *listen_ctx;
220	};
221
222	struct tls_hdr {
223	u8 type;
224	u16 version;
225	u16 length;
226	} __packed;
227
228	struct tlsrx_cmp_hdr {
229	u8 type;
230	u16 version;
231	u16 length;
232
233	u64 tls_seq;
234	u16 reserved1;
235	u8 res_to_mac_error;
236	} __packed;
237
238	/* res_to_mac_error fields */
239	#define TLSRX_HDR_PKT_INT_ERROR_S 4
240	#define TLSRX_HDR_PKT_INT_ERROR_M 0x1
241	#define TLSRX_HDR_PKT_INT_ERROR_V(x) \
242	((x) << TLSRX_HDR_PKT_INT_ERROR_S)
243	#define TLSRX_HDR_PKT_INT_ERROR_G(x) \
244	(((x) >> TLSRX_HDR_PKT_INT_ERROR_S) & TLSRX_HDR_PKT_INT_ERROR_M)
245	#define TLSRX_HDR_PKT_INT_ERROR_F TLSRX_HDR_PKT_INT_ERROR_V(1U)
246
247	#define TLSRX_HDR_PKT_SPP_ERROR_S 3
248	#define TLSRX_HDR_PKT_SPP_ERROR_M 0x1
249	#define TLSRX_HDR_PKT_SPP_ERROR_V(x) ((x) << TLSRX_HDR_PKT_SPP_ERROR)
250	#define TLSRX_HDR_PKT_SPP_ERROR_G(x) \
251	(((x) >> TLSRX_HDR_PKT_SPP_ERROR_S) & TLSRX_HDR_PKT_SPP_ERROR_M)
252	#define TLSRX_HDR_PKT_SPP_ERROR_F TLSRX_HDR_PKT_SPP_ERROR_V(1U)
253
254	#define TLSRX_HDR_PKT_CCDX_ERROR_S 2
255	#define TLSRX_HDR_PKT_CCDX_ERROR_M 0x1
256	#define TLSRX_HDR_PKT_CCDX_ERROR_V(x) ((x) << TLSRX_HDR_PKT_CCDX_ERROR_S)
257	#define TLSRX_HDR_PKT_CCDX_ERROR_G(x) \
258	(((x) >> TLSRX_HDR_PKT_CCDX_ERROR_S) & TLSRX_HDR_PKT_CCDX_ERROR_M)
259	#define TLSRX_HDR_PKT_CCDX_ERROR_F TLSRX_HDR_PKT_CCDX_ERROR_V(1U)
260
261	#define TLSRX_HDR_PKT_PAD_ERROR_S 1
262	#define TLSRX_HDR_PKT_PAD_ERROR_M 0x1
263	#define TLSRX_HDR_PKT_PAD_ERROR_V(x) ((x) << TLSRX_HDR_PKT_PAD_ERROR_S)
264	#define TLSRX_HDR_PKT_PAD_ERROR_G(x) \
265	(((x) >> TLSRX_HDR_PKT_PAD_ERROR_S) & TLSRX_HDR_PKT_PAD_ERROR_M)
266	#define TLSRX_HDR_PKT_PAD_ERROR_F TLSRX_HDR_PKT_PAD_ERROR_V(1U)
267
268	#define TLSRX_HDR_PKT_MAC_ERROR_S 0
269	#define TLSRX_HDR_PKT_MAC_ERROR_M 0x1
270	#define TLSRX_HDR_PKT_MAC_ERROR_V(x) ((x) << TLSRX_HDR_PKT_MAC_ERROR)
271	#define TLSRX_HDR_PKT_MAC_ERROR_G(x) \
272	(((x) >> S_TLSRX_HDR_PKT_MAC_ERROR_S) & TLSRX_HDR_PKT_MAC_ERROR_M)
273	#define TLSRX_HDR_PKT_MAC_ERROR_F TLSRX_HDR_PKT_MAC_ERROR_V(1U)
274
275	#define TLSRX_HDR_PKT_ERROR_M 0x1F
17a7d24a	276	#define CONTENT_TYPE_ERROR 0x7F
a6779341 AG	277
	278	struct ulp_mem_rw {
	279	__be32 cmd;
	280	__be32 len16; /* command length */
	281	__be32 dlen; /* data length in 32-byte units */
	282	__be32 lock_addr;
	283	};
	284
	285	struct tls_key_wr {
	286	__be32 op_to_compl;
	287	__be32 flowid_len16;
	288	__be32 ftid;
	289	u8 reneg_to_write_rx;
	290	u8 protocol;
	291	__be16 mfs;
	292	};
	293
	294	struct tls_key_req {
	295	struct tls_key_wr wr;
	296	struct ulp_mem_rw req;
	297	struct ulptx_idata sc_imm;
	298	};
	299
	300	/*
	301	* This lives in skb->cb and is used to chain WRs in a linked list.
	302	*/
	303	struct wr_skb_cb {
	304	struct l2t_skb_cb l2t; /* reserve space for l2t CB */
	305	struct sk_buff next_wr; / next write request */
	306	};
	307
	308	/* Per-skb backlog handler. Run when a socket's backlog is processed. */
	309	struct blog_skb_cb {
	310	void (backlog_rcv)(struct sock sk, struct sk_buff *skb);
	311	struct chtls_dev *cdev;
	312	};
	313
	314	/*
	315	* Similar to tcp_skb_cb but with ULP elements added to support TLS,
	316	* etc.
	317	*/
	318	struct ulp_skb_cb {
	319	struct wr_skb_cb wr; /* reserve space for write request */
	320	u16 flags; /* TCP-like flags */
	321	u8 psh;
	322	u8 ulp_mode; /* ULP mode/submode of sk_buff */
	323	u32 seq; /* TCP sequence number */
	324	union { /* ULP-specific fields */
	325	struct {
	326	u8 type;
	327	u8 ofld;
	328	u8 iv;
	329	} tls;
	330	} ulp;
	331	};
	332
	333	#define ULP_SKB_CB(skb) ((struct ulp_skb_cb *)&((skb)->cb[0]))
	334	#define BLOG_SKB_CB(skb) ((struct blog_skb_cb *)(skb)->cb)
	335
	336	/*
	337	* Flags for ulp_skb_cb.flags.
	338	*/
	339	enum {
	340	ULPCB_FLAG_NEED_HDR = 1 << 0, /* packet needs a TX_DATA_WR header */
341	ULPCB_FLAG_NO_APPEND = 1 << 1, /* don't grow this skb */
342	ULPCB_FLAG_BARRIER = 1 << 2, /* set TX_WAIT_IDLE after sending */
343	ULPCB_FLAG_HOLD = 1 << 3, /* skb not ready for Tx yet */
344	ULPCB_FLAG_COMPL = 1 << 4, /* request WR completion */
345	ULPCB_FLAG_URG = 1 << 5, /* urgent data */
17a7d24a AG	346	ULPCB_FLAG_TLS_HDR = 1 << 6, /* payload with tls hdr */
17a7d24a AG	347	ULPCB_FLAG_NO_HDR = 1 << 7, /* not a ofld wr */
a6779341 AG	348	};
	349
	350	/* The ULP mode/submode of an skbuff */
	351	#define skb_ulp_mode(skb) (ULP_SKB_CB(skb)->ulp_mode)
	352	#define TCP_PAGE(sk) (sk->sk_frag.page)
	353	#define TCP_OFF(sk) (sk->sk_frag.offset)
	354
	355	static inline struct chtls_dev to_chtls_dev(struct tls_device tlsdev)
	356	{
	357	return container_of(tlsdev, struct chtls_dev, tlsdev);
	358	}
	359
	360	static inline void csk_set_flag(struct chtls_sock *csk,
	361	enum csk_flags flag)
	362	{
	363	__set_bit(flag, &csk->flags);
	364	}
	365
	366	static inline void csk_reset_flag(struct chtls_sock *csk,
	367	enum csk_flags flag)
	368	{
	369	__clear_bit(flag, &csk->flags);
	370	}
	371
	372	static inline bool csk_conn_inline(const struct chtls_sock *csk)
	373	{
	374	return test_bit(CSK_CONN_INLINE, &csk->flags);
	375	}
	376
	377	static inline int csk_flag(const struct sock *sk, enum csk_flags flag)
	378	{
	379	struct chtls_sock *csk = rcu_dereference_sk_user_data(sk);
	380
	381	if (!csk_conn_inline(csk))
	382	return 0;
	383	return test_bit(flag, &csk->flags);
	384	}
	385
	386	static inline int csk_flag_nochk(const struct chtls_sock *csk,
	387	enum csk_flags flag)
	388	{
	389	return test_bit(flag, &csk->flags);
	390	}
	391
	392	static inline void cplhdr(struct sk_buff skb)
	393	{
	394	return skb->data;
	395	}
	396
	397	static inline int is_neg_adv(unsigned int status)
	398	{
	399	return status == CPL_ERR_RTX_NEG_ADVICE \|\|
	400	status == CPL_ERR_KEEPALV_NEG_ADVICE \|\|
	401	status == CPL_ERR_PERSIST_NEG_ADVICE;
	402	}
	403
	404	static inline void process_cpl_msg(void (fn)(struct sock , struct sk_buff *),
	405	struct sock *sk,
	406	struct sk_buff *skb)
	407	{
	408	skb_reset_mac_header(skb);
	409	skb_reset_network_header(skb);
	410	skb_reset_transport_header(skb);
	411
412	bh_lock_sock(sk);
413	if (unlikely(sock_owned_by_user(sk))) {
414	BLOG_SKB_CB(skb)->backlog_rcv = fn;
415	__sk_add_backlog(sk, skb);
416	} else {
417	fn(sk, skb);
418	}
419	bh_unlock_sock(sk);
420	}
421
422	static inline void chtls_sock_free(struct kref *ref)
423	{
424	struct chtls_sock *csk = container_of(ref, struct chtls_sock,
425	kref);
426	kfree(csk);
427	}
428
429	static inline void __chtls_sock_put(const char fn, struct chtls_sock csk)
430	{
431	kref_put(&csk->kref, chtls_sock_free);
432	}
433
434	static inline void __chtls_sock_get(const char *fn,
435	struct chtls_sock *csk)
436	{
437	kref_get(&csk->kref);
438	}
439
440	static inline void send_or_defer(struct sock sk, struct tcp_sock tp,
441	struct sk_buff *skb, int through_l2t)
442	{
443	struct chtls_sock *csk = rcu_dereference_sk_user_data(sk);
444
445	if (through_l2t) {
446	/* send through L2T */
447	cxgb4_l2t_send(csk->egress_dev, skb, csk->l2t_entry);
448	} else {
449	/* send directly */
450	cxgb4_ofld_send(csk->egress_dev, skb);
451	}
452	}
453
454	typedef int (chtls_handler_func)(struct chtls_dev , struct sk_buff *);
455	extern chtls_handler_func chtls_handlers[NUM_CPL_CMDS];
456	void chtls_install_cpl_ops(struct sock *sk);
457	int chtls_init_kmap(struct chtls_dev cdev, struct cxgb4_lld_info lldi);
458	void chtls_listen_stop(struct chtls_dev cdev, struct sock sk);
459	int chtls_listen_start(struct chtls_dev cdev, struct sock sk);
460	void chtls_close(struct sock *sk, long timeout);
461	int chtls_disconnect(struct sock *sk, int flags);
462	void chtls_shutdown(struct sock *sk, int how);
463	void chtls_destroy_sock(struct sock *sk);
464	int chtls_sendmsg(struct sock sk, struct msghdr msg, size_t size);
465	int chtls_recvmsg(struct sock sk, struct msghdr msg,
466	size_t len, int nonblock, int flags, int *addr_len);
467	int chtls_sendpage(struct sock sk, struct page page,
468	int offset, size_t size, int flags);
469	int send_tx_flowc_wr(struct sock *sk, int compl,
470	u32 snd_nxt, u32 rcv_nxt);
471	void chtls_tcp_push(struct sock *sk, int flags);
472	int chtls_push_frames(struct chtls_sock *csk, int comp);
473	int chtls_set_tcb_tflag(struct sock *sk, unsigned int bit_pos, int val);
474	int chtls_setkey(struct chtls_sock *csk, u32 keylen, u32 mode);
475	void skb_entail(struct sock sk, struct sk_buff skb, int flags);
476	unsigned int keyid_to_addr(int start_addr, int keyid);
477	void free_tls_keyid(struct sock *sk);
478	#endif