drivers/crypto/chelsio/chtls/chtls.h

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This source file includes following definitions.
to_chtls_dev
csk_set_flag
csk_reset_flag
csk_conn_inline
csk_flag
csk_flag_nochk
cplhdr
is_neg_adv
process_cpl_msg
chtls_sock_free
__chtls_sock_put
__chtls_sock_get
send_or_defer
   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Copyright (c) 2018 Chelsio Communications, Inc.
   4  */
   5 
   6 #ifndef __CHTLS_H__
   7 #define __CHTLS_H__
   8 
   9 #include <crypto/aes.h>
  10 #include <crypto/algapi.h>
  11 #include <crypto/hash.h>
  12 #include <crypto/sha.h>
  13 #include <crypto/authenc.h>
  14 #include <crypto/ctr.h>
  15 #include <crypto/gf128mul.h>
  16 #include <crypto/internal/aead.h>
  17 #include <crypto/null.h>
  18 #include <crypto/internal/skcipher.h>
  19 #include <crypto/aead.h>
  20 #include <crypto/scatterwalk.h>
  21 #include <crypto/internal/hash.h>
  22 #include <linux/tls.h>
  23 #include <net/tls.h>
  24 
  25 #include "t4fw_api.h"
  26 #include "t4_msg.h"
  27 #include "cxgb4.h"
  28 #include "cxgb4_uld.h"
  29 #include "l2t.h"
  30 #include "chcr_algo.h"
  31 #include "chcr_core.h"
  32 #include "chcr_crypto.h"
  33 
  34 #define MAX_IVS_PAGE                    256
  35 #define TLS_KEY_CONTEXT_SZ              64
  36 #define CIPHER_BLOCK_SIZE               16
  37 #define GCM_TAG_SIZE                    16
  38 #define KEY_ON_MEM_SZ                   16
  39 #define AEAD_EXPLICIT_DATA_SIZE         8
  40 #define TLS_HEADER_LENGTH               5
  41 #define SCMD_CIPH_MODE_AES_GCM          2
  42 /* Any MFS size should work and come from openssl */
  43 #define TLS_MFS                         16384
  44 
  45 #define RSS_HDR sizeof(struct rss_header)
  46 #define TLS_WR_CPL_LEN \
  47         (sizeof(struct fw_tlstx_data_wr) + sizeof(struct cpl_tx_tls_sfo))
  48 
  49 enum {
  50         CHTLS_KEY_CONTEXT_DSGL,
  51         CHTLS_KEY_CONTEXT_IMM,
  52         CHTLS_KEY_CONTEXT_DDR,
  53 };
  54 
  55 enum {
  56         CHTLS_LISTEN_START,
  57         CHTLS_LISTEN_STOP,
  58 };
  59 
  60 /* Flags for return value of CPL message handlers */
  61 enum {
  62         CPL_RET_BUF_DONE =    1,   /* buffer processing done */
  63         CPL_RET_BAD_MSG =     2,   /* bad CPL message */
  64         CPL_RET_UNKNOWN_TID = 4    /* unexpected unknown TID */
  65 };
  66 
  67 #define LISTEN_INFO_HASH_SIZE 32
  68 #define RSPQ_HASH_BITS 5
  69 struct listen_info {
  70         struct listen_info *next;  /* Link to next entry */
  71         struct sock *sk;           /* The listening socket */
  72         unsigned int stid;         /* The server TID */
  73 };
  74 
  75 enum {
  76         T4_LISTEN_START_PENDING,
  77         T4_LISTEN_STARTED
  78 };
  79 
  80 enum csk_flags {
  81         CSK_CALLBACKS_CHKD,     /* socket callbacks have been sanitized */
  82         CSK_ABORT_REQ_RCVD,     /* received one ABORT_REQ_RSS message */
  83         CSK_TX_MORE_DATA,       /* sending ULP data; don't set SHOVE bit */
  84         CSK_TX_WAIT_IDLE,       /* suspend Tx until in-flight data is ACKed */
  85         CSK_ABORT_SHUTDOWN,     /* shouldn't send more abort requests */
  86         CSK_ABORT_RPL_PENDING,  /* expecting an abort reply */
  87         CSK_CLOSE_CON_REQUESTED,/* we've sent a close_conn_req */
  88         CSK_TX_DATA_SENT,       /* sent a TX_DATA WR on this connection */
  89         CSK_TX_FAILOVER,        /* Tx traffic failing over */
  90         CSK_UPDATE_RCV_WND,     /* Need to update rcv window */
  91         CSK_RST_ABORTED,        /* outgoing RST was aborted */
  92         CSK_TLS_HANDSHK,        /* TLS Handshake */
  93         CSK_CONN_INLINE,        /* Connection on HW */
  94 };
  95 
  96 enum chtls_cdev_state {
  97         CHTLS_CDEV_STATE_UP = 1
  98 };
  99 
 100 struct listen_ctx {
 101         struct sock *lsk;
 102         struct chtls_dev *cdev;
 103         struct sk_buff_head synq;
 104         u32 state;
 105 };
 106 
 107 struct key_map {
 108         unsigned long *addr;
 109         unsigned int start;
 110         unsigned int available;
 111         unsigned int size;
 112         spinlock_t lock; /* lock for key id request from map */
 113 } __packed;
 114 
 115 struct tls_scmd {
 116         u32 seqno_numivs;
 117         u32 ivgen_hdrlen;
 118 };
 119 
 120 struct chtls_dev {
 121         struct tls_device tlsdev;
 122         struct list_head list;
 123         struct cxgb4_lld_info *lldi;
 124         struct pci_dev *pdev;
 125         struct listen_info *listen_hash_tab[LISTEN_INFO_HASH_SIZE];
 126         spinlock_t listen_lock; /* lock for listen list */
 127         struct net_device **ports;
 128         struct tid_info *tids;
 129         unsigned int pfvf;
 130         const unsigned short *mtus;
 131 
 132         struct idr hwtid_idr;
 133         struct idr stid_idr;
 134 
 135         spinlock_t idr_lock ____cacheline_aligned_in_smp;
 136 
 137         struct net_device *egr_dev[NCHAN * 2];
 138         struct sk_buff *rspq_skb_cache[1 << RSPQ_HASH_BITS];
 139         struct sk_buff *askb;
 140 
 141         struct sk_buff_head deferq;
 142         struct work_struct deferq_task;
 143 
 144         struct list_head list_node;
 145         struct list_head rcu_node;
 146         struct list_head na_node;
 147         unsigned int send_page_order;
 148         int max_host_sndbuf;
 149         struct key_map kmap;
 150         unsigned int cdev_state;
 151 };
 152 
 153 struct chtls_listen {
 154         struct chtls_dev *cdev;
 155         struct sock *sk;
 156 };
 157 
 158 struct chtls_hws {
 159         struct sk_buff_head sk_recv_queue;
 160         u8 txqid;
 161         u8 ofld;
 162         u16 type;
 163         u16 rstate;
 164         u16 keyrpl;
 165         u16 pldlen;
 166         u16 rcvpld;
 167         u16 compute;
 168         u16 expansion;
 169         u16 keylen;
 170         u16 pdus;
 171         u16 adjustlen;
 172         u16 ivsize;
 173         u16 txleft;
 174         u32 mfs;
 175         s32 txkey;
 176         s32 rxkey;
 177         u32 fcplenmax;
 178         u32 copied_seq;
 179         u64 tx_seq_no;
 180         struct tls_scmd scmd;
 181         struct tls12_crypto_info_aes_gcm_128 crypto_info;
 182 };
 183 
 184 struct chtls_sock {
 185         struct sock *sk;
 186         struct chtls_dev *cdev;
 187         struct l2t_entry *l2t_entry;    /* pointer to the L2T entry */
 188         struct net_device *egress_dev;  /* TX_CHAN for act open retry */
 189 
 190         struct sk_buff_head txq;
 191         struct sk_buff *wr_skb_head;
 192         struct sk_buff *wr_skb_tail;
 193         struct sk_buff *ctrl_skb_cache;
 194         struct sk_buff *txdata_skb_cache; /* abort path messages */
 195         struct kref kref;
 196         unsigned long flags;
 197         u32 opt2;
 198         u32 wr_credits;
 199         u32 wr_unacked;
 200         u32 wr_max_credits;
 201         u32 wr_nondata;
 202         u32 hwtid;               /* TCP Control Block ID */
 203         u32 txq_idx;
 204         u32 rss_qid;
 205         u32 tid;
 206         u32 idr;
 207         u32 mss;
 208         u32 ulp_mode;
 209         u32 tx_chan;
 210         u32 rx_chan;
 211         u32 sndbuf;
 212         u32 txplen_max;
 213         u32 mtu_idx;           /* MTU table index */
 214         u32 smac_idx;
 215         u8 port_id;
 216         u8 tos;
 217         u16 resv2;
 218         u32 delack_mode;
 219         u32 delack_seq;
 220         u32 snd_win;
 221         u32 rcv_win;
 222 
 223         void *passive_reap_next;        /* placeholder for passive */
 224         struct chtls_hws tlshws;
 225         struct synq {
 226                 struct sk_buff *next;
 227                 struct sk_buff *prev;
 228         } synq;
 229         struct listen_ctx *listen_ctx;
 230 };
 231 
 232 struct tls_hdr {
 233         u8  type;
 234         u16 version;
 235         u16 length;
 236 } __packed;
 237 
 238 struct tlsrx_cmp_hdr {
 239         u8  type;
 240         u16 version;
 241         u16 length;
 242 
 243         u64 tls_seq;
 244         u16 reserved1;
 245         u8  res_to_mac_error;
 246 } __packed;
 247 
 248 /* res_to_mac_error fields */
 249 #define TLSRX_HDR_PKT_INT_ERROR_S   4
 250 #define TLSRX_HDR_PKT_INT_ERROR_M   0x1
 251 #define TLSRX_HDR_PKT_INT_ERROR_V(x) \
 252         ((x) << TLSRX_HDR_PKT_INT_ERROR_S)
 253 #define TLSRX_HDR_PKT_INT_ERROR_G(x) \
 254         (((x) >> TLSRX_HDR_PKT_INT_ERROR_S) & TLSRX_HDR_PKT_INT_ERROR_M)
 255 #define TLSRX_HDR_PKT_INT_ERROR_F   TLSRX_HDR_PKT_INT_ERROR_V(1U)
 256 
 257 #define TLSRX_HDR_PKT_SPP_ERROR_S        3
 258 #define TLSRX_HDR_PKT_SPP_ERROR_M        0x1
 259 #define TLSRX_HDR_PKT_SPP_ERROR_V(x)     ((x) << TLSRX_HDR_PKT_SPP_ERROR)
 260 #define TLSRX_HDR_PKT_SPP_ERROR_G(x)     \
 261         (((x) >> TLSRX_HDR_PKT_SPP_ERROR_S) & TLSRX_HDR_PKT_SPP_ERROR_M)
 262 #define TLSRX_HDR_PKT_SPP_ERROR_F        TLSRX_HDR_PKT_SPP_ERROR_V(1U)
 263 
 264 #define TLSRX_HDR_PKT_CCDX_ERROR_S       2
 265 #define TLSRX_HDR_PKT_CCDX_ERROR_M       0x1
 266 #define TLSRX_HDR_PKT_CCDX_ERROR_V(x)    ((x) << TLSRX_HDR_PKT_CCDX_ERROR_S)
 267 #define TLSRX_HDR_PKT_CCDX_ERROR_G(x)    \
 268         (((x) >> TLSRX_HDR_PKT_CCDX_ERROR_S) & TLSRX_HDR_PKT_CCDX_ERROR_M)
 269 #define TLSRX_HDR_PKT_CCDX_ERROR_F       TLSRX_HDR_PKT_CCDX_ERROR_V(1U)
 270 
 271 #define TLSRX_HDR_PKT_PAD_ERROR_S        1
 272 #define TLSRX_HDR_PKT_PAD_ERROR_M        0x1
 273 #define TLSRX_HDR_PKT_PAD_ERROR_V(x)     ((x) << TLSRX_HDR_PKT_PAD_ERROR_S)
 274 #define TLSRX_HDR_PKT_PAD_ERROR_G(x)     \
 275         (((x) >> TLSRX_HDR_PKT_PAD_ERROR_S) & TLSRX_HDR_PKT_PAD_ERROR_M)
 276 #define TLSRX_HDR_PKT_PAD_ERROR_F        TLSRX_HDR_PKT_PAD_ERROR_V(1U)
 277 
 278 #define TLSRX_HDR_PKT_MAC_ERROR_S        0
 279 #define TLSRX_HDR_PKT_MAC_ERROR_M        0x1
 280 #define TLSRX_HDR_PKT_MAC_ERROR_V(x)     ((x) << TLSRX_HDR_PKT_MAC_ERROR)
 281 #define TLSRX_HDR_PKT_MAC_ERROR_G(x)     \
 282         (((x) >> S_TLSRX_HDR_PKT_MAC_ERROR_S) & TLSRX_HDR_PKT_MAC_ERROR_M)
 283 #define TLSRX_HDR_PKT_MAC_ERROR_F        TLSRX_HDR_PKT_MAC_ERROR_V(1U)
 284 
 285 #define TLSRX_HDR_PKT_ERROR_M           0x1F
 286 #define CONTENT_TYPE_ERROR              0x7F
 287 
 288 struct ulp_mem_rw {
 289         __be32 cmd;
 290         __be32 len16;             /* command length */
 291         __be32 dlen;              /* data length in 32-byte units */
 292         __be32 lock_addr;
 293 };
 294 
 295 struct tls_key_wr {
 296         __be32 op_to_compl;
 297         __be32 flowid_len16;
 298         __be32 ftid;
 299         u8   reneg_to_write_rx;
 300         u8   protocol;
 301         __be16 mfs;
 302 };
 303 
 304 struct tls_key_req {
 305         struct tls_key_wr wr;
 306         struct ulp_mem_rw req;
 307         struct ulptx_idata sc_imm;
 308 };
 309 
 310 /*
 311  * This lives in skb->cb and is used to chain WRs in a linked list.
 312  */
 313 struct wr_skb_cb {
 314         struct l2t_skb_cb l2t;          /* reserve space for l2t CB */
 315         struct sk_buff *next_wr;        /* next write request */
 316 };
 317 
 318 /* Per-skb backlog handler.  Run when a socket's backlog is processed. */
 319 struct blog_skb_cb {
 320         void (*backlog_rcv)(struct sock *sk, struct sk_buff *skb);
 321         struct chtls_dev *cdev;
 322 };
 323 
 324 /*
 325  * Similar to tcp_skb_cb but with ULP elements added to support TLS,
 326  * etc.
 327  */
 328 struct ulp_skb_cb {
 329         struct wr_skb_cb wr;            /* reserve space for write request */
 330         u16 flags;                      /* TCP-like flags */
 331         u8 psh;
 332         u8 ulp_mode;                    /* ULP mode/submode of sk_buff */
 333         u32 seq;                        /* TCP sequence number */
 334         union { /* ULP-specific fields */
 335                 struct {
 336                         u8  type;
 337                         u8  ofld;
 338                         u8  iv;
 339                 } tls;
 340         } ulp;
 341 };
 342 
 343 #define ULP_SKB_CB(skb) ((struct ulp_skb_cb *)&((skb)->cb[0]))
 344 #define BLOG_SKB_CB(skb) ((struct blog_skb_cb *)(skb)->cb)
 345 
 346 /*
 347  * Flags for ulp_skb_cb.flags.
 348  */
 349 enum {
 350         ULPCB_FLAG_NEED_HDR  = 1 << 0,  /* packet needs a TX_DATA_WR header */
 351         ULPCB_FLAG_NO_APPEND = 1 << 1,  /* don't grow this skb */
 352         ULPCB_FLAG_BARRIER   = 1 << 2,  /* set TX_WAIT_IDLE after sending */
 353         ULPCB_FLAG_HOLD      = 1 << 3,  /* skb not ready for Tx yet */
 354         ULPCB_FLAG_COMPL     = 1 << 4,  /* request WR completion */
 355         ULPCB_FLAG_URG       = 1 << 5,  /* urgent data */
 356         ULPCB_FLAG_TLS_HDR   = 1 << 6,  /* payload with tls hdr */
 357         ULPCB_FLAG_NO_HDR    = 1 << 7,  /* not a ofld wr */
 358 };
 359 
 360 /* The ULP mode/submode of an skbuff */
 361 #define skb_ulp_mode(skb)  (ULP_SKB_CB(skb)->ulp_mode)
 362 #define TCP_PAGE(sk)   (sk->sk_frag.page)
 363 #define TCP_OFF(sk)    (sk->sk_frag.offset)
 364 
 365 static inline struct chtls_dev *to_chtls_dev(struct tls_device *tlsdev)
 366 {
 367         return container_of(tlsdev, struct chtls_dev, tlsdev);
 368 }
 369 
 370 static inline void csk_set_flag(struct chtls_sock *csk,
 371                                 enum csk_flags flag)
 372 {
 373         __set_bit(flag, &csk->flags);
 374 }
 375 
 376 static inline void csk_reset_flag(struct chtls_sock *csk,
 377                                   enum csk_flags flag)
 378 {
 379         __clear_bit(flag, &csk->flags);
 380 }
 381 
 382 static inline bool csk_conn_inline(const struct chtls_sock *csk)
 383 {
 384         return test_bit(CSK_CONN_INLINE, &csk->flags);
 385 }
 386 
 387 static inline int csk_flag(const struct sock *sk, enum csk_flags flag)
 388 {
 389         struct chtls_sock *csk = rcu_dereference_sk_user_data(sk);
 390 
 391         if (!csk_conn_inline(csk))
 392                 return 0;
 393         return test_bit(flag, &csk->flags);
 394 }
 395 
 396 static inline int csk_flag_nochk(const struct chtls_sock *csk,
 397                                  enum csk_flags flag)
 398 {
 399         return test_bit(flag, &csk->flags);
 400 }
 401 
 402 static inline void *cplhdr(struct sk_buff *skb)
 403 {
 404         return skb->data;
 405 }
 406 
 407 static inline int is_neg_adv(unsigned int status)
 408 {
 409         return status == CPL_ERR_RTX_NEG_ADVICE ||
 410                status == CPL_ERR_KEEPALV_NEG_ADVICE ||
 411                status == CPL_ERR_PERSIST_NEG_ADVICE;
 412 }
 413 
 414 static inline void process_cpl_msg(void (*fn)(struct sock *, struct sk_buff *),
 415                                    struct sock *sk,
 416                                    struct sk_buff *skb)
 417 {
 418         skb_reset_mac_header(skb);
 419         skb_reset_network_header(skb);
 420         skb_reset_transport_header(skb);
 421 
 422         bh_lock_sock(sk);
 423         if (unlikely(sock_owned_by_user(sk))) {
 424                 BLOG_SKB_CB(skb)->backlog_rcv = fn;
 425                 __sk_add_backlog(sk, skb);
 426         } else {
 427                 fn(sk, skb);
 428         }
 429         bh_unlock_sock(sk);
 430 }
 431 
 432 static inline void chtls_sock_free(struct kref *ref)
 433 {
 434         struct chtls_sock *csk = container_of(ref, struct chtls_sock,
 435                                               kref);
 436         kfree(csk);
 437 }
 438 
 439 static inline void __chtls_sock_put(const char *fn, struct chtls_sock *csk)
 440 {
 441         kref_put(&csk->kref, chtls_sock_free);
 442 }
 443 
 444 static inline void __chtls_sock_get(const char *fn,
 445                                     struct chtls_sock *csk)
 446 {
 447         kref_get(&csk->kref);
 448 }
 449 
 450 static inline void send_or_defer(struct sock *sk, struct tcp_sock *tp,
 451                                  struct sk_buff *skb, int through_l2t)
 452 {
 453         struct chtls_sock *csk = rcu_dereference_sk_user_data(sk);
 454 
 455         if (through_l2t) {
 456                 /* send through L2T */
 457                 cxgb4_l2t_send(csk->egress_dev, skb, csk->l2t_entry);
 458         } else {
 459                 /* send directly */
 460                 cxgb4_ofld_send(csk->egress_dev, skb);
 461         }
 462 }
 463 
 464 typedef int (*chtls_handler_func)(struct chtls_dev *, struct sk_buff *);
 465 extern chtls_handler_func chtls_handlers[NUM_CPL_CMDS];
 466 void chtls_install_cpl_ops(struct sock *sk);
 467 int chtls_init_kmap(struct chtls_dev *cdev, struct cxgb4_lld_info *lldi);
 468 void chtls_listen_stop(struct chtls_dev *cdev, struct sock *sk);
 469 int chtls_listen_start(struct chtls_dev *cdev, struct sock *sk);
 470 void chtls_close(struct sock *sk, long timeout);
 471 int chtls_disconnect(struct sock *sk, int flags);
 472 void chtls_shutdown(struct sock *sk, int how);
 473 void chtls_destroy_sock(struct sock *sk);
 474 int chtls_sendmsg(struct sock *sk, struct msghdr *msg, size_t size);
 475 int chtls_recvmsg(struct sock *sk, struct msghdr *msg,
 476                   size_t len, int nonblock, int flags, int *addr_len);
 477 int chtls_sendpage(struct sock *sk, struct page *page,
 478                    int offset, size_t size, int flags);
 479 int send_tx_flowc_wr(struct sock *sk, int compl,
 480                      u32 snd_nxt, u32 rcv_nxt);
 481 void chtls_tcp_push(struct sock *sk, int flags);
 482 int chtls_push_frames(struct chtls_sock *csk, int comp);
 483 int chtls_set_tcb_tflag(struct sock *sk, unsigned int bit_pos, int val);
 484 int chtls_setkey(struct chtls_sock *csk, u32 keylen, u32 mode);
 485 void skb_entail(struct sock *sk, struct sk_buff *skb, int flags);
 486 unsigned int keyid_to_addr(int start_addr, int keyid);
 487 void free_tls_keyid(struct sock *sk);
 488 #endif
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/crypto/chelsio/chtls/chtls.h

INCLUDED FROM

DEFINITIONS
