1 /* 2 * This file is part of the Chelsio T4 Ethernet driver for Linux. 3 * 4 * Copyright (c) 2003-2016 Chelsio Communications, Inc. All rights reserved. 5 * 6 * This software is available to you under a choice of one of two 7 * licenses. You may choose to be licensed under the terms of the GNU 8 * General Public License (GPL) Version 2, available from the file 9 * COPYING in the main directory of this source tree, or the 10 * OpenIB.org BSD license below: 11 * 12 * Redistribution and use in source and binary forms, with or 13 * without modification, are permitted provided that the following 14 * conditions are met: 15 * 16 * - Redistributions of source code must retain the above 17 * copyright notice, this list of conditions and the following 18 * disclaimer. 19 * 20 * - Redistributions in binary form must reproduce the above 21 * copyright notice, this list of conditions and the following 22 * disclaimer in the documentation and/or other materials 23 * provided with the distribution. 24 * 25 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 26 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 27 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 28 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS 29 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN 30 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN 31 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 32 * SOFTWARE. 33 */ 34 35 #ifndef __CXGB4_ULD_H 36 #define __CXGB4_ULD_H 37 38 #include <linux/cache.h> 39 #include <linux/spinlock.h> 40 #include <linux/skbuff.h> 41 #include <linux/inetdevice.h> 42 #include <linux/atomic.h> 43 #include <net/tls.h> 44 #include "cxgb4.h" 45 46 #define MAX_ULD_QSETS 16 47 #define MAX_ULD_NPORTS 4 48 49 /* CPL message priority levels */ 50 enum { 51 CPL_PRIORITY_DATA = 0, /* data messages */ 52 CPL_PRIORITY_SETUP = 1, /* connection setup messages */ 53 CPL_PRIORITY_TEARDOWN = 0, /* connection teardown messages */ 54 CPL_PRIORITY_LISTEN = 1, /* listen start/stop messages */ 55 CPL_PRIORITY_ACK = 1, /* RX ACK messages */ 56 CPL_PRIORITY_CONTROL = 1 /* control messages */ 57 }; 58 59 #define INIT_TP_WR(w, tid) do { \ 60 (w)->wr.wr_hi = htonl(FW_WR_OP_V(FW_TP_WR) | \ 61 FW_WR_IMMDLEN_V(sizeof(*w) - sizeof(w->wr))); \ 62 (w)->wr.wr_mid = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(sizeof(*w), 16)) | \ 63 FW_WR_FLOWID_V(tid)); \ 64 (w)->wr.wr_lo = cpu_to_be64(0); \ 65 } while (0) 66 67 #define INIT_TP_WR_CPL(w, cpl, tid) do { \ 68 INIT_TP_WR(w, tid); \ 69 OPCODE_TID(w) = htonl(MK_OPCODE_TID(cpl, tid)); \ 70 } while (0) 71 72 #define INIT_ULPTX_WR(w, wrlen, atomic, tid) do { \ 73 (w)->wr.wr_hi = htonl(FW_WR_OP_V(FW_ULPTX_WR) | \ 74 FW_WR_ATOMIC_V(atomic)); \ 75 (w)->wr.wr_mid = htonl(FW_WR_LEN16_V(DIV_ROUND_UP(wrlen, 16)) | \ 76 FW_WR_FLOWID_V(tid)); \ 77 (w)->wr.wr_lo = cpu_to_be64(0); \ 78 } while (0) 79 80 /* Special asynchronous notification message */ 81 #define CXGB4_MSG_AN ((void *)1) 82 #define TX_ULD(uld)(((uld) != CXGB4_ULD_CRYPTO) ? CXGB4_TX_OFLD :\ 83 CXGB4_TX_CRYPTO) 84 85 struct serv_entry { 86 void *data; 87 }; 88 89 union aopen_entry { 90 void *data; 91 union aopen_entry *next; 92 }; 93 94 struct eotid_entry { 95 void *data; 96 }; 97 98 /* 99 * Holds the size, base address, free list start, etc of the TID, server TID, 100 * and active-open TID tables. The tables themselves are allocated dynamically. 101 */ 102 struct tid_info { 103 void **tid_tab; 104 unsigned int tid_base; 105 unsigned int ntids; 106 107 struct serv_entry *stid_tab; 108 unsigned long *stid_bmap; 109 unsigned int nstids; 110 unsigned int stid_base; 111 112 unsigned int nhash; 113 unsigned int hash_base; 114 115 union aopen_entry *atid_tab; 116 unsigned int natids; 117 unsigned int atid_base; 118 119 struct filter_entry *hpftid_tab; 120 unsigned long *hpftid_bmap; 121 unsigned int nhpftids; 122 unsigned int hpftid_base; 123 124 struct filter_entry *ftid_tab; 125 unsigned long *ftid_bmap; 126 unsigned int nftids; 127 unsigned int ftid_base; 128 unsigned int aftid_base; 129 unsigned int aftid_end; 130 /* Server filter region */ 131 unsigned int sftid_base; 132 unsigned int nsftids; 133 134 spinlock_t atid_lock ____cacheline_aligned_in_smp; 135 union aopen_entry *afree; 136 unsigned int atids_in_use; 137 138 spinlock_t stid_lock; 139 unsigned int stids_in_use; 140 unsigned int v6_stids_in_use; 141 unsigned int sftids_in_use; 142 143 /* ETHOFLD range */ 144 struct eotid_entry *eotid_tab; 145 unsigned long *eotid_bmap; 146 unsigned int eotid_base; 147 unsigned int neotids; 148 149 /* TIDs in the TCAM */ 150 atomic_t tids_in_use; 151 /* TIDs in the HASH */ 152 atomic_t hash_tids_in_use; 153 atomic_t conns_in_use; 154 /* ETHOFLD TIDs used for rate limiting */ 155 atomic_t eotids_in_use; 156 157 /* lock for setting/clearing filter bitmap */ 158 spinlock_t ftid_lock; 159 160 unsigned int tc_hash_tids_max_prio; 161 }; 162 163 static inline void *lookup_tid(const struct tid_info *t, unsigned int tid) 164 { 165 tid -= t->tid_base; 166 return tid < t->ntids ? t->tid_tab[tid] : NULL; 167 } 168 169 static inline bool tid_out_of_range(const struct tid_info *t, unsigned int tid) 170 { 171 return ((tid - t->tid_base) >= t->ntids); 172 } 173 174 static inline void *lookup_atid(const struct tid_info *t, unsigned int atid) 175 { 176 return atid < t->natids ? t->atid_tab[atid].data : NULL; 177 } 178 179 static inline void *lookup_stid(const struct tid_info *t, unsigned int stid) 180 { 181 /* Is it a server filter TID? */ 182 if (t->nsftids && (stid >= t->sftid_base)) { 183 stid -= t->sftid_base; 184 stid += t->nstids; 185 } else { 186 stid -= t->stid_base; 187 } 188 189 return stid < (t->nstids + t->nsftids) ? t->stid_tab[stid].data : NULL; 190 } 191 192 static inline void cxgb4_insert_tid(struct tid_info *t, void *data, 193 unsigned int tid, unsigned short family) 194 { 195 t->tid_tab[tid - t->tid_base] = data; 196 if (t->hash_base && (tid >= t->hash_base)) { 197 if (family == AF_INET6) 198 atomic_add(2, &t->hash_tids_in_use); 199 else 200 atomic_inc(&t->hash_tids_in_use); 201 } else { 202 if (family == AF_INET6) 203 atomic_add(2, &t->tids_in_use); 204 else 205 atomic_inc(&t->tids_in_use); 206 } 207 atomic_inc(&t->conns_in_use); 208 } 209 210 static inline struct eotid_entry *cxgb4_lookup_eotid(struct tid_info *t, 211 u32 eotid) 212 { 213 return eotid < t->neotids ? &t->eotid_tab[eotid] : NULL; 214 } 215 216 static inline int cxgb4_get_free_eotid(struct tid_info *t) 217 { 218 int eotid; 219 220 eotid = find_first_zero_bit(t->eotid_bmap, t->neotids); 221 if (eotid >= t->neotids) 222 eotid = -1; 223 224 return eotid; 225 } 226 227 static inline void cxgb4_alloc_eotid(struct tid_info *t, u32 eotid, void *data) 228 { 229 set_bit(eotid, t->eotid_bmap); 230 t->eotid_tab[eotid].data = data; 231 atomic_inc(&t->eotids_in_use); 232 } 233 234 static inline void cxgb4_free_eotid(struct tid_info *t, u32 eotid) 235 { 236 clear_bit(eotid, t->eotid_bmap); 237 t->eotid_tab[eotid].data = NULL; 238 atomic_dec(&t->eotids_in_use); 239 } 240 241 int cxgb4_alloc_atid(struct tid_info *t, void *data); 242 int cxgb4_alloc_stid(struct tid_info *t, int family, void *data); 243 int cxgb4_alloc_sftid(struct tid_info *t, int family, void *data); 244 void cxgb4_free_atid(struct tid_info *t, unsigned int atid); 245 void cxgb4_free_stid(struct tid_info *t, unsigned int stid, int family); 246 void cxgb4_remove_tid(struct tid_info *t, unsigned int qid, unsigned int tid, 247 unsigned short family); 248 struct in6_addr; 249 250 int cxgb4_create_server(const struct net_device *dev, unsigned int stid, 251 __be32 sip, __be16 sport, __be16 vlan, 252 unsigned int queue); 253 int cxgb4_create_server6(const struct net_device *dev, unsigned int stid, 254 const struct in6_addr *sip, __be16 sport, 255 unsigned int queue); 256 int cxgb4_remove_server(const struct net_device *dev, unsigned int stid, 257 unsigned int queue, bool ipv6); 258 int cxgb4_create_server_filter(const struct net_device *dev, unsigned int stid, 259 __be32 sip, __be16 sport, __be16 vlan, 260 unsigned int queue, 261 unsigned char port, unsigned char mask); 262 int cxgb4_remove_server_filter(const struct net_device *dev, unsigned int stid, 263 unsigned int queue, bool ipv6); 264 265 /* Filter operation context to allow callers of cxgb4_set_filter() and 266 * cxgb4_del_filter() to wait for an asynchronous completion. 267 */ 268 struct filter_ctx { 269 struct completion completion; /* completion rendezvous */ 270 void *closure; /* caller's opaque information */ 271 int result; /* result of operation */ 272 u32 tid; /* to store tid */ 273 }; 274 275 struct chcr_ktls { 276 refcount_t ktls_refcount; 277 }; 278 279 struct ch_filter_specification; 280 281 int cxgb4_get_free_ftid(struct net_device *dev, u8 family, bool hash_en, 282 u32 tc_prio); 283 int __cxgb4_set_filter(struct net_device *dev, int filter_id, 284 struct ch_filter_specification *fs, 285 struct filter_ctx *ctx); 286 int __cxgb4_del_filter(struct net_device *dev, int filter_id, 287 struct ch_filter_specification *fs, 288 struct filter_ctx *ctx); 289 int cxgb4_set_filter(struct net_device *dev, int filter_id, 290 struct ch_filter_specification *fs); 291 int cxgb4_del_filter(struct net_device *dev, int filter_id, 292 struct ch_filter_specification *fs); 293 int cxgb4_get_filter_counters(struct net_device *dev, unsigned int fidx, 294 u64 *hitcnt, u64 *bytecnt, bool hash); 295 296 static inline void set_wr_txq(struct sk_buff *skb, int prio, int queue) 297 { 298 skb_set_queue_mapping(skb, (queue << 1) | prio); 299 } 300 301 enum cxgb4_uld { 302 CXGB4_ULD_INIT, 303 CXGB4_ULD_RDMA, 304 CXGB4_ULD_ISCSI, 305 CXGB4_ULD_ISCSIT, 306 CXGB4_ULD_CRYPTO, 307 CXGB4_ULD_IPSEC, 308 CXGB4_ULD_TLS, 309 CXGB4_ULD_KTLS, 310 CXGB4_ULD_MAX 311 }; 312 313 enum cxgb4_tx_uld { 314 CXGB4_TX_OFLD, 315 CXGB4_TX_CRYPTO, 316 CXGB4_TX_MAX 317 }; 318 319 enum cxgb4_txq_type { 320 CXGB4_TXQ_ETH, 321 CXGB4_TXQ_ULD, 322 CXGB4_TXQ_CTRL, 323 CXGB4_TXQ_MAX 324 }; 325 326 enum cxgb4_state { 327 CXGB4_STATE_UP, 328 CXGB4_STATE_START_RECOVERY, 329 CXGB4_STATE_DOWN, 330 CXGB4_STATE_DETACH, 331 CXGB4_STATE_FATAL_ERROR 332 }; 333 334 enum cxgb4_control { 335 CXGB4_CONTROL_DB_FULL, 336 CXGB4_CONTROL_DB_EMPTY, 337 CXGB4_CONTROL_DB_DROP, 338 }; 339 340 struct adapter; 341 struct pci_dev; 342 struct l2t_data; 343 struct net_device; 344 struct pkt_gl; 345 struct tp_tcp_stats; 346 struct t4_lro_mgr; 347 348 struct cxgb4_range { 349 unsigned int start; 350 unsigned int size; 351 }; 352 353 struct cxgb4_virt_res { /* virtualized HW resources */ 354 struct cxgb4_range ddp; 355 struct cxgb4_range iscsi; 356 struct cxgb4_range stag; 357 struct cxgb4_range rq; 358 struct cxgb4_range srq; 359 struct cxgb4_range pbl; 360 struct cxgb4_range qp; 361 struct cxgb4_range cq; 362 struct cxgb4_range ocq; 363 struct cxgb4_range key; 364 unsigned int ncrypto_fc; 365 struct cxgb4_range ppod_edram; 366 }; 367 368 #if IS_ENABLED(CONFIG_CHELSIO_TLS_DEVICE) 369 struct ch_ktls_port_stats_debug { 370 atomic64_t ktls_tx_connection_open; 371 atomic64_t ktls_tx_connection_fail; 372 atomic64_t ktls_tx_connection_close; 373 atomic64_t ktls_tx_encrypted_packets; 374 atomic64_t ktls_tx_encrypted_bytes; 375 atomic64_t ktls_tx_ctx; 376 atomic64_t ktls_tx_ooo; 377 atomic64_t ktls_tx_skip_no_sync_data; 378 atomic64_t ktls_tx_drop_no_sync_data; 379 atomic64_t ktls_tx_drop_bypass_req; 380 }; 381 382 struct ch_ktls_stats_debug { 383 struct ch_ktls_port_stats_debug ktls_port[MAX_ULD_NPORTS]; 384 atomic64_t ktls_tx_send_records; 385 atomic64_t ktls_tx_end_pkts; 386 atomic64_t ktls_tx_start_pkts; 387 atomic64_t ktls_tx_middle_pkts; 388 atomic64_t ktls_tx_retransmit_pkts; 389 atomic64_t ktls_tx_complete_pkts; 390 atomic64_t ktls_tx_trimmed_pkts; 391 atomic64_t ktls_tx_fallback; 392 }; 393 #endif 394 395 struct chcr_stats_debug { 396 atomic_t cipher_rqst; 397 atomic_t digest_rqst; 398 atomic_t aead_rqst; 399 atomic_t complete; 400 atomic_t error; 401 atomic_t fallback; 402 atomic_t tls_pdu_tx; 403 atomic_t tls_pdu_rx; 404 atomic_t tls_key; 405 }; 406 407 #if IS_ENABLED(CONFIG_CHELSIO_IPSEC_INLINE) 408 struct ch_ipsec_stats_debug { 409 atomic_t ipsec_cnt; 410 }; 411 #endif 412 413 #define OCQ_WIN_OFFSET(pdev, vres) \ 414 (pci_resource_len((pdev), 2) - roundup_pow_of_two((vres)->ocq.size)) 415 416 /* 417 * Block of information the LLD provides to ULDs attaching to a device. 418 */ 419 struct cxgb4_lld_info { 420 struct pci_dev *pdev; /* associated PCI device */ 421 struct l2t_data *l2t; /* L2 table */ 422 struct tid_info *tids; /* TID table */ 423 struct net_device **ports; /* device ports */ 424 const struct cxgb4_virt_res *vr; /* assorted HW resources */ 425 const unsigned short *mtus; /* MTU table */ 426 const unsigned short *rxq_ids; /* the ULD's Rx queue ids */ 427 const unsigned short *ciq_ids; /* the ULD's concentrator IQ ids */ 428 unsigned short nrxq; /* # of Rx queues */ 429 unsigned short ntxq; /* # of Tx queues */ 430 unsigned short nciq; /* # of concentrator IQ */ 431 unsigned char nchan:4; /* # of channels */ 432 unsigned char nports:4; /* # of ports */ 433 unsigned char wr_cred; /* WR 16-byte credits */ 434 unsigned char adapter_type; /* type of adapter */ 435 unsigned char fw_api_ver; /* FW API version */ 436 unsigned char crypto; /* crypto support */ 437 unsigned int fw_vers; /* FW version */ 438 unsigned int iscsi_iolen; /* iSCSI max I/O length */ 439 unsigned int cclk_ps; /* Core clock period in psec */ 440 unsigned short udb_density; /* # of user DB/page */ 441 unsigned short ucq_density; /* # of user CQs/page */ 442 unsigned int sge_host_page_size; /* SGE host page size */ 443 unsigned short filt_mode; /* filter optional components */ 444 unsigned short tx_modq[NCHAN]; /* maps each tx channel to a */ 445 /* scheduler queue */ 446 void __iomem *gts_reg; /* address of GTS register */ 447 void __iomem *db_reg; /* address of kernel doorbell */ 448 int dbfifo_int_thresh; /* doorbell fifo int threshold */ 449 unsigned int sge_ingpadboundary; /* SGE ingress padding boundary */ 450 unsigned int sge_egrstatuspagesize; /* SGE egress status page size */ 451 unsigned int sge_pktshift; /* Padding between CPL and */ 452 /* packet data */ 453 unsigned int pf; /* Physical Function we're using */ 454 bool enable_fw_ofld_conn; /* Enable connection through fw */ 455 /* WR */ 456 unsigned int max_ordird_qp; /* Max ORD/IRD depth per RDMA QP */ 457 unsigned int max_ird_adapter; /* Max IRD memory per adapter */ 458 bool ulptx_memwrite_dsgl; /* use of T5 DSGL allowed */ 459 unsigned int iscsi_tagmask; /* iscsi ddp tag mask */ 460 unsigned int iscsi_pgsz_order; /* iscsi ddp page size orders */ 461 unsigned int iscsi_llimit; /* chip's iscsi region llimit */ 462 unsigned int ulp_crypto; /* crypto lookaside support */ 463 void **iscsi_ppm; /* iscsi page pod manager */ 464 int nodeid; /* device numa node id */ 465 bool fr_nsmr_tpte_wr_support; /* FW supports FR_NSMR_TPTE_WR */ 466 bool write_w_imm_support; /* FW supports WRITE_WITH_IMMEDIATE */ 467 bool write_cmpl_support; /* FW supports WRITE_CMPL WR */ 468 }; 469 470 struct cxgb4_uld_info { 471 char name[IFNAMSIZ]; 472 void *handle; 473 unsigned int nrxq; 474 unsigned int rxq_size; 475 unsigned int ntxq; 476 bool ciq; 477 bool lro; 478 void *(*add)(const struct cxgb4_lld_info *p); 479 int (*rx_handler)(void *handle, const __be64 *rsp, 480 const struct pkt_gl *gl); 481 int (*state_change)(void *handle, enum cxgb4_state new_state); 482 int (*control)(void *handle, enum cxgb4_control control, ...); 483 int (*lro_rx_handler)(void *handle, const __be64 *rsp, 484 const struct pkt_gl *gl, 485 struct t4_lro_mgr *lro_mgr, 486 struct napi_struct *napi); 487 void (*lro_flush)(struct t4_lro_mgr *); 488 int (*tx_handler)(struct sk_buff *skb, struct net_device *dev); 489 #if IS_ENABLED(CONFIG_CHELSIO_TLS_DEVICE) 490 const struct tlsdev_ops *tlsdev_ops; 491 #endif 492 #if IS_ENABLED(CONFIG_XFRM_OFFLOAD) 493 const struct xfrmdev_ops *xfrmdev_ops; 494 #endif 495 }; 496 497 static inline bool cxgb4_is_ktls_skb(struct sk_buff *skb) 498 { 499 return skb->sk && tls_is_sk_tx_device_offloaded(skb->sk); 500 } 501 502 void cxgb4_uld_enable(struct adapter *adap); 503 void cxgb4_register_uld(enum cxgb4_uld type, const struct cxgb4_uld_info *p); 504 int cxgb4_unregister_uld(enum cxgb4_uld type); 505 int cxgb4_ofld_send(struct net_device *dev, struct sk_buff *skb); 506 int cxgb4_immdata_send(struct net_device *dev, unsigned int idx, 507 const void *src, unsigned int len); 508 int cxgb4_crypto_send(struct net_device *dev, struct sk_buff *skb); 509 unsigned int cxgb4_dbfifo_count(const struct net_device *dev, int lpfifo); 510 unsigned int cxgb4_port_chan(const struct net_device *dev); 511 unsigned int cxgb4_port_e2cchan(const struct net_device *dev); 512 unsigned int cxgb4_port_viid(const struct net_device *dev); 513 unsigned int cxgb4_tp_smt_idx(enum chip_type chip, unsigned int viid); 514 unsigned int cxgb4_port_idx(const struct net_device *dev); 515 unsigned int cxgb4_best_mtu(const unsigned short *mtus, unsigned short mtu, 516 unsigned int *idx); 517 unsigned int cxgb4_best_aligned_mtu(const unsigned short *mtus, 518 unsigned short header_size, 519 unsigned short data_size_max, 520 unsigned short data_size_align, 521 unsigned int *mtu_idxp); 522 void cxgb4_get_tcp_stats(struct pci_dev *pdev, struct tp_tcp_stats *v4, 523 struct tp_tcp_stats *v6); 524 void cxgb4_iscsi_init(struct net_device *dev, unsigned int tag_mask, 525 const unsigned int *pgsz_order); 526 struct sk_buff *cxgb4_pktgl_to_skb(const struct pkt_gl *gl, 527 unsigned int skb_len, unsigned int pull_len); 528 int cxgb4_sync_txq_pidx(struct net_device *dev, u16 qid, u16 pidx, u16 size); 529 int cxgb4_flush_eq_cache(struct net_device *dev); 530 int cxgb4_read_tpte(struct net_device *dev, u32 stag, __be32 *tpte); 531 u64 cxgb4_read_sge_timestamp(struct net_device *dev); 532 533 enum cxgb4_bar2_qtype { CXGB4_BAR2_QTYPE_EGRESS, CXGB4_BAR2_QTYPE_INGRESS }; 534 int cxgb4_bar2_sge_qregs(struct net_device *dev, 535 unsigned int qid, 536 enum cxgb4_bar2_qtype qtype, 537 int user, 538 u64 *pbar2_qoffset, 539 unsigned int *pbar2_qid); 540 541 #endif /* !__CXGB4_ULD_H */ 542