1 /* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */ 2 /* 3 * Copyright(c) 2016 - 2019 Intel Corporation. 4 */ 5 6 #ifndef DEF_RDMA_VT_H 7 #define DEF_RDMA_VT_H 8 9 /* 10 * Structure that low level drivers will populate in order to register with the 11 * rdmavt layer. 12 */ 13 14 #include <linux/spinlock.h> 15 #include <linux/list.h> 16 #include <linux/hash.h> 17 #include <rdma/ib_verbs.h> 18 #include <rdma/ib_mad.h> 19 #include <rdma/rdmavt_mr.h> 20 21 #define RVT_MAX_PKEY_VALUES 16 22 23 #define RVT_MAX_TRAP_LEN 100 /* Limit pending trap list */ 24 #define RVT_MAX_TRAP_LISTS 5 /*((IB_NOTICE_TYPE_INFO & 0x0F) + 1)*/ 25 #define RVT_TRAP_TIMEOUT 4096 /* 4.096 usec */ 26 27 struct trap_list { 28 u32 list_len; 29 struct list_head list; 30 }; 31 32 struct rvt_qp; 33 struct rvt_qpn_table; 34 struct rvt_ibport { 35 struct rvt_qp __rcu *qp[2]; 36 struct ib_mad_agent *send_agent; /* agent for SMI (traps) */ 37 struct rb_root mcast_tree; 38 spinlock_t lock; /* protect changes in this struct */ 39 40 /* non-zero when timer is set */ 41 unsigned long mkey_lease_timeout; 42 unsigned long trap_timeout; 43 __be64 gid_prefix; /* in network order */ 44 __be64 mkey; 45 u64 tid; 46 u32 port_cap_flags; 47 u16 port_cap3_flags; 48 u32 pma_sample_start; 49 u32 pma_sample_interval; 50 __be16 pma_counter_select[5]; 51 u16 pma_tag; 52 u16 mkey_lease_period; 53 u32 sm_lid; 54 u8 sm_sl; 55 u8 mkeyprot; 56 u8 subnet_timeout; 57 u8 vl_high_limit; 58 59 /* 60 * Driver is expected to keep these up to date. These 61 * counters are informational only and not required to be 62 * completely accurate. 63 */ 64 u64 n_rc_resends; 65 u64 n_seq_naks; 66 u64 n_rdma_seq; 67 u64 n_rnr_naks; 68 u64 n_other_naks; 69 u64 n_loop_pkts; 70 u64 n_pkt_drops; 71 u64 n_vl15_dropped; 72 u64 n_rc_timeouts; 73 u64 n_dmawait; 74 u64 n_unaligned; 75 u64 n_rc_dupreq; 76 u64 n_rc_seqnak; 77 u64 n_rc_crwaits; 78 u16 pkey_violations; 79 u16 qkey_violations; 80 u16 mkey_violations; 81 82 /* Hot-path per CPU counters to avoid cacheline trading to update */ 83 u64 z_rc_acks; 84 u64 z_rc_qacks; 85 u64 z_rc_delayed_comp; 86 u64 __percpu *rc_acks; 87 u64 __percpu *rc_qacks; 88 u64 __percpu *rc_delayed_comp; 89 90 void *priv; /* driver private data */ 91 92 /* 93 * The pkey table is allocated and maintained by the driver. Drivers 94 * need to have access to this before registering with rdmav. However 95 * rdmavt will need access to it so drivers need to provide this during 96 * the attach port API call. 97 */ 98 u16 *pkey_table; 99 100 struct rvt_ah *sm_ah; 101 102 /* 103 * Keep a list of traps that have not been repressed. They will be 104 * resent based on trap_timer. 105 */ 106 struct trap_list trap_lists[RVT_MAX_TRAP_LISTS]; 107 struct timer_list trap_timer; 108 }; 109 110 #define RVT_CQN_MAX 16 /* maximum length of cq name */ 111 112 #define RVT_SGE_COPY_MEMCPY 0 113 #define RVT_SGE_COPY_CACHELESS 1 114 #define RVT_SGE_COPY_ADAPTIVE 2 115 116 /* 117 * Things that are driver specific, module parameters in hfi1 and qib 118 */ 119 struct rvt_driver_params { 120 struct ib_device_attr props; 121 122 /* 123 * Anything driver specific that is not covered by props 124 * For instance special module parameters. Goes here. 125 */ 126 unsigned int lkey_table_size; 127 unsigned int qp_table_size; 128 unsigned int sge_copy_mode; 129 unsigned int wss_threshold; 130 unsigned int wss_clean_period; 131 int qpn_start; 132 int qpn_inc; 133 int qpn_res_start; 134 int qpn_res_end; 135 int nports; 136 int npkeys; 137 int node; 138 int psn_mask; 139 int psn_shift; 140 int psn_modify_mask; 141 u32 core_cap_flags; 142 u32 max_mad_size; 143 u8 qos_shift; 144 u8 max_rdma_atomic; 145 u8 extra_rdma_atomic; 146 u8 reserved_operations; 147 }; 148 149 /* User context */ 150 struct rvt_ucontext { 151 struct ib_ucontext ibucontext; 152 }; 153 154 /* Protection domain */ 155 struct rvt_pd { 156 struct ib_pd ibpd; 157 bool user; 158 }; 159 160 /* Address handle */ 161 struct rvt_ah { 162 struct ib_ah ibah; 163 struct rdma_ah_attr attr; 164 u8 vl; 165 u8 log_pmtu; 166 }; 167 168 /* 169 * This structure is used by rvt_mmap() to validate an offset 170 * when an mmap() request is made. The vm_area_struct then uses 171 * this as its vm_private_data. 172 */ 173 struct rvt_mmap_info { 174 struct list_head pending_mmaps; 175 struct ib_ucontext *context; 176 void *obj; 177 __u64 offset; 178 struct kref ref; 179 u32 size; 180 }; 181 182 /* memory working set size */ 183 struct rvt_wss { 184 unsigned long *entries; 185 atomic_t total_count; 186 atomic_t clean_counter; 187 atomic_t clean_entry; 188 189 int threshold; 190 int num_entries; 191 long pages_mask; 192 unsigned int clean_period; 193 }; 194 195 struct rvt_dev_info; 196 struct rvt_swqe; 197 struct rvt_driver_provided { 198 /* 199 * Which functions are required depends on which verbs rdmavt is 200 * providing and which verbs the driver is overriding. See 201 * check_support() for details. 202 */ 203 204 /* hot path calldowns in a single cacheline */ 205 206 /* 207 * Give the driver a notice that there is send work to do. It is up to 208 * the driver to generally push the packets out, this just queues the 209 * work with the driver. There are two variants here. The no_lock 210 * version requires the s_lock not to be held. The other assumes the 211 * s_lock is held. 212 */ 213 bool (*schedule_send)(struct rvt_qp *qp); 214 bool (*schedule_send_no_lock)(struct rvt_qp *qp); 215 216 /* 217 * Driver specific work request setup and checking. 218 * This function is allowed to perform any setup, checks, or 219 * adjustments required to the SWQE in order to be usable by 220 * underlying protocols. This includes private data structure 221 * allocations. 222 */ 223 int (*setup_wqe)(struct rvt_qp *qp, struct rvt_swqe *wqe, 224 bool *call_send); 225 226 /* 227 * Sometimes rdmavt needs to kick the driver's send progress. That is 228 * done by this call back. 229 */ 230 void (*do_send)(struct rvt_qp *qp); 231 232 /* 233 * Returns a pointer to the underlying hardware's PCI device. This is 234 * used to display information as to what hardware is being referenced 235 * in an output message 236 */ 237 struct pci_dev * (*get_pci_dev)(struct rvt_dev_info *rdi); 238 239 /* 240 * Allocate a private queue pair data structure for driver specific 241 * information which is opaque to rdmavt. Errors are returned via 242 * ERR_PTR(err). The driver is free to return NULL or a valid 243 * pointer. 244 */ 245 void * (*qp_priv_alloc)(struct rvt_dev_info *rdi, struct rvt_qp *qp); 246 247 /* 248 * Init a structure allocated with qp_priv_alloc(). This should be 249 * called after all qp fields have been initialized in rdmavt. 250 */ 251 int (*qp_priv_init)(struct rvt_dev_info *rdi, struct rvt_qp *qp, 252 struct ib_qp_init_attr *init_attr); 253 254 /* 255 * Free the driver's private qp structure. 256 */ 257 void (*qp_priv_free)(struct rvt_dev_info *rdi, struct rvt_qp *qp); 258 259 /* 260 * Inform the driver the particular qp in question has been reset so 261 * that it can clean up anything it needs to. 262 */ 263 void (*notify_qp_reset)(struct rvt_qp *qp); 264 265 /* 266 * Get a path mtu from the driver based on qp attributes. 267 */ 268 int (*get_pmtu_from_attr)(struct rvt_dev_info *rdi, struct rvt_qp *qp, 269 struct ib_qp_attr *attr); 270 271 /* 272 * Notify driver that it needs to flush any outstanding IO requests that 273 * are waiting on a qp. 274 */ 275 void (*flush_qp_waiters)(struct rvt_qp *qp); 276 277 /* 278 * Notify driver to stop its queue of sending packets. Nothing else 279 * should be posted to the queue pair after this has been called. 280 */ 281 void (*stop_send_queue)(struct rvt_qp *qp); 282 283 /* 284 * Have the driver drain any in progress operations 285 */ 286 void (*quiesce_qp)(struct rvt_qp *qp); 287 288 /* 289 * Inform the driver a qp has went to error state. 290 */ 291 void (*notify_error_qp)(struct rvt_qp *qp); 292 293 /* 294 * Get an MTU for a qp. 295 */ 296 u32 (*mtu_from_qp)(struct rvt_dev_info *rdi, struct rvt_qp *qp, 297 u32 pmtu); 298 /* 299 * Convert an mtu to a path mtu 300 */ 301 int (*mtu_to_path_mtu)(u32 mtu); 302 303 /* 304 * Get the guid of a port in big endian byte order 305 */ 306 int (*get_guid_be)(struct rvt_dev_info *rdi, struct rvt_ibport *rvp, 307 int guid_index, __be64 *guid); 308 309 /* 310 * Query driver for the state of the port. 311 */ 312 int (*query_port_state)(struct rvt_dev_info *rdi, u32 port_num, 313 struct ib_port_attr *props); 314 315 /* 316 * Tell driver to shutdown a port 317 */ 318 int (*shut_down_port)(struct rvt_dev_info *rdi, u32 port_num); 319 320 /* Tell driver to send a trap for changed port capabilities */ 321 void (*cap_mask_chg)(struct rvt_dev_info *rdi, u32 port_num); 322 323 /* 324 * The following functions can be safely ignored completely. Any use of 325 * these is checked for NULL before blindly calling. Rdmavt should also 326 * be functional if drivers omit these. 327 */ 328 329 /* Called to inform the driver that all qps should now be freed. */ 330 unsigned (*free_all_qps)(struct rvt_dev_info *rdi); 331 332 /* Driver specific AH validation */ 333 int (*check_ah)(struct ib_device *, struct rdma_ah_attr *); 334 335 /* Inform the driver a new AH has been created */ 336 void (*notify_new_ah)(struct ib_device *, struct rdma_ah_attr *, 337 struct rvt_ah *); 338 339 /* Let the driver pick the next queue pair number*/ 340 int (*alloc_qpn)(struct rvt_dev_info *rdi, struct rvt_qpn_table *qpt, 341 enum ib_qp_type type, u32 port_num); 342 343 /* Determine if its safe or allowed to modify the qp */ 344 int (*check_modify_qp)(struct rvt_qp *qp, struct ib_qp_attr *attr, 345 int attr_mask, struct ib_udata *udata); 346 347 /* Driver specific QP modification/notification-of */ 348 void (*modify_qp)(struct rvt_qp *qp, struct ib_qp_attr *attr, 349 int attr_mask, struct ib_udata *udata); 350 351 /* Notify driver a mad agent has been created */ 352 void (*notify_create_mad_agent)(struct rvt_dev_info *rdi, int port_idx); 353 354 /* Notify driver a mad agent has been removed */ 355 void (*notify_free_mad_agent)(struct rvt_dev_info *rdi, int port_idx); 356 357 /* Notify driver to restart rc */ 358 void (*notify_restart_rc)(struct rvt_qp *qp, u32 psn, int wait); 359 360 /* Get and return CPU to pin CQ processing thread */ 361 int (*comp_vect_cpu_lookup)(struct rvt_dev_info *rdi, int comp_vect); 362 }; 363 364 struct rvt_dev_info { 365 struct ib_device ibdev; /* Keep this first. Nothing above here */ 366 367 /* 368 * Prior to calling for registration the driver will be responsible for 369 * allocating space for this structure. 370 * 371 * The driver will also be responsible for filling in certain members of 372 * dparms.props. The driver needs to fill in dparms exactly as it would 373 * want values reported to a ULP. This will be returned to the caller 374 * in rdmavt's device. The driver should also therefore refrain from 375 * modifying this directly after registration with rdmavt. 376 */ 377 378 /* Driver specific properties */ 379 struct rvt_driver_params dparms; 380 381 /* post send table */ 382 const struct rvt_operation_params *post_parms; 383 384 /* opcode translation table */ 385 const enum ib_wc_opcode *wc_opcode; 386 387 /* Driver specific helper functions */ 388 struct rvt_driver_provided driver_f; 389 390 struct rvt_mregion __rcu *dma_mr; 391 struct rvt_lkey_table lkey_table; 392 393 /* Internal use */ 394 int n_pds_allocated; 395 spinlock_t n_pds_lock; /* Protect pd allocated count */ 396 397 int n_ahs_allocated; 398 spinlock_t n_ahs_lock; /* Protect ah allocated count */ 399 400 u32 n_srqs_allocated; 401 spinlock_t n_srqs_lock; /* Protect srqs allocated count */ 402 403 int flags; 404 struct rvt_ibport **ports; 405 406 /* QP */ 407 struct rvt_qp_ibdev *qp_dev; 408 u32 n_qps_allocated; /* number of QPs allocated for device */ 409 u32 n_rc_qps; /* number of RC QPs allocated for device */ 410 u32 busy_jiffies; /* timeout scaling based on RC QP count */ 411 spinlock_t n_qps_lock; /* protect qps, rc qps and busy jiffy counts */ 412 413 /* memory maps */ 414 struct list_head pending_mmaps; 415 spinlock_t mmap_offset_lock; /* protect mmap_offset */ 416 u32 mmap_offset; 417 spinlock_t pending_lock; /* protect pending mmap list */ 418 419 /* CQ */ 420 u32 n_cqs_allocated; /* number of CQs allocated for device */ 421 spinlock_t n_cqs_lock; /* protect count of in use cqs */ 422 423 /* Multicast */ 424 u32 n_mcast_grps_allocated; /* number of mcast groups allocated */ 425 spinlock_t n_mcast_grps_lock; 426 427 /* Memory Working Set Size */ 428 struct rvt_wss *wss; 429 }; 430 431 /** 432 * rvt_set_ibdev_name - Craft an IB device name from client info 433 * @rdi: pointer to the client rvt_dev_info structure 434 * @name: client specific name 435 * @unit: client specific unit number. 436 */ rvt_set_ibdev_name(struct rvt_dev_info * rdi,const char * fmt,const char * name,const int unit)437 static inline void rvt_set_ibdev_name(struct rvt_dev_info *rdi, 438 const char *fmt, const char *name, 439 const int unit) 440 { 441 /* 442 * FIXME: rvt and its users want to touch the ibdev before 443 * registration and have things like the name work. We don't have the 444 * infrastructure in the core to support this directly today, hack it 445 * to work by setting the name manually here. 446 */ 447 dev_set_name(&rdi->ibdev.dev, fmt, name, unit); 448 strscpy(rdi->ibdev.name, dev_name(&rdi->ibdev.dev), IB_DEVICE_NAME_MAX); 449 } 450 451 /** 452 * rvt_get_ibdev_name - return the IB name 453 * @rdi: rdmavt device 454 * 455 * Return the registered name of the device. 456 */ rvt_get_ibdev_name(const struct rvt_dev_info * rdi)457 static inline const char *rvt_get_ibdev_name(const struct rvt_dev_info *rdi) 458 { 459 return dev_name(&rdi->ibdev.dev); 460 } 461 ibpd_to_rvtpd(struct ib_pd * ibpd)462 static inline struct rvt_pd *ibpd_to_rvtpd(struct ib_pd *ibpd) 463 { 464 return container_of(ibpd, struct rvt_pd, ibpd); 465 } 466 ibah_to_rvtah(struct ib_ah * ibah)467 static inline struct rvt_ah *ibah_to_rvtah(struct ib_ah *ibah) 468 { 469 return container_of(ibah, struct rvt_ah, ibah); 470 } 471 ib_to_rvt(struct ib_device * ibdev)472 static inline struct rvt_dev_info *ib_to_rvt(struct ib_device *ibdev) 473 { 474 return container_of(ibdev, struct rvt_dev_info, ibdev); 475 } 476 rvt_get_npkeys(struct rvt_dev_info * rdi)477 static inline unsigned rvt_get_npkeys(struct rvt_dev_info *rdi) 478 { 479 /* 480 * All ports have same number of pkeys. 481 */ 482 return rdi->dparms.npkeys; 483 } 484 485 /* 486 * Return the max atomic suitable for determining 487 * the size of the ack ring buffer in a QP. 488 */ rvt_max_atomic(struct rvt_dev_info * rdi)489 static inline unsigned int rvt_max_atomic(struct rvt_dev_info *rdi) 490 { 491 return rdi->dparms.max_rdma_atomic + 492 rdi->dparms.extra_rdma_atomic + 1; 493 } 494 rvt_size_atomic(struct rvt_dev_info * rdi)495 static inline unsigned int rvt_size_atomic(struct rvt_dev_info *rdi) 496 { 497 return rdi->dparms.max_rdma_atomic + 498 rdi->dparms.extra_rdma_atomic; 499 } 500 501 /* 502 * Return the indexed PKEY from the port PKEY table. 503 */ rvt_get_pkey(struct rvt_dev_info * rdi,int port_index,unsigned index)504 static inline u16 rvt_get_pkey(struct rvt_dev_info *rdi, 505 int port_index, 506 unsigned index) 507 { 508 if (index >= rvt_get_npkeys(rdi)) 509 return 0; 510 else 511 return rdi->ports[port_index]->pkey_table[index]; 512 } 513 514 struct rvt_dev_info *rvt_alloc_device(size_t size, int nports); 515 void rvt_dealloc_device(struct rvt_dev_info *rdi); 516 int rvt_register_device(struct rvt_dev_info *rvd); 517 void rvt_unregister_device(struct rvt_dev_info *rvd); 518 int rvt_check_ah(struct ib_device *ibdev, struct rdma_ah_attr *ah_attr); 519 int rvt_init_port(struct rvt_dev_info *rdi, struct rvt_ibport *port, 520 int port_index, u16 *pkey_table); 521 int rvt_fast_reg_mr(struct rvt_qp *qp, struct ib_mr *ibmr, u32 key, 522 int access); 523 int rvt_invalidate_rkey(struct rvt_qp *qp, u32 rkey); 524 int rvt_rkey_ok(struct rvt_qp *qp, struct rvt_sge *sge, 525 u32 len, u64 vaddr, u32 rkey, int acc); 526 int rvt_lkey_ok(struct rvt_lkey_table *rkt, struct rvt_pd *pd, 527 struct rvt_sge *isge, struct rvt_sge *last_sge, 528 struct ib_sge *sge, int acc); 529 struct rvt_mcast *rvt_mcast_find(struct rvt_ibport *ibp, union ib_gid *mgid, 530 u16 lid); 531 532 #endif /* DEF_RDMA_VT_H */ 533