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1/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */2/*3 * Copyright(c) 2015 - 2018 Intel Corporation.4 */5 6#ifndef HFI1_VERBS_H7#define HFI1_VERBS_H8 9#include <linux/types.h>10#include <linux/seqlock.h>11#include <linux/kernel.h>12#include <linux/interrupt.h>13#include <linux/kref.h>14#include <linux/workqueue.h>15#include <linux/kthread.h>16#include <linux/completion.h>17#include <linux/slab.h>18#include <rdma/ib_pack.h>19#include <rdma/ib_user_verbs.h>20#include <rdma/ib_mad.h>21#include <rdma/ib_hdrs.h>22#include <rdma/rdma_vt.h>23#include <rdma/rdmavt_qp.h>24#include <rdma/rdmavt_cq.h>25 26struct hfi1_ctxtdata;27struct hfi1_pportdata;28struct hfi1_devdata;29struct hfi1_packet;30 31#include "iowait.h"32#include "tid_rdma.h"33#include "opfn.h"34 35#define HFI1_MAX_RDMA_ATOMIC 1636 37/*38 * Increment this value if any changes that break userspace ABI39 * compatibility are made.40 */41#define HFI1_UVERBS_ABI_VERSION 242 43/* IB Performance Manager status values */44#define IB_PMA_SAMPLE_STATUS_DONE 0x0045#define IB_PMA_SAMPLE_STATUS_STARTED 0x0146#define IB_PMA_SAMPLE_STATUS_RUNNING 0x0247 48/* Mandatory IB performance counter select values. */49#define IB_PMA_PORT_XMIT_DATA cpu_to_be16(0x0001)50#define IB_PMA_PORT_RCV_DATA cpu_to_be16(0x0002)51#define IB_PMA_PORT_XMIT_PKTS cpu_to_be16(0x0003)52#define IB_PMA_PORT_RCV_PKTS cpu_to_be16(0x0004)53#define IB_PMA_PORT_XMIT_WAIT cpu_to_be16(0x0005)54 55#define HFI1_VENDOR_IPG cpu_to_be16(0xFFA0)56 57#define IB_DEFAULT_GID_PREFIX cpu_to_be64(0xfe80000000000000ULL)58#define OPA_BTH_MIG_REQ BIT(31)59 60#define RC_OP(x) IB_OPCODE_RC_##x61#define UC_OP(x) IB_OPCODE_UC_##x62 63/* flags passed by hfi1_ib_rcv() */64enum {65 HFI1_HAS_GRH = (1 << 0),66};67 68#define LRH_16B_BYTES (sizeof_field(struct hfi1_16b_header, lrh))69#define LRH_16B_DWORDS (LRH_16B_BYTES / sizeof(u32))70#define LRH_9B_BYTES (sizeof_field(struct ib_header, lrh))71#define LRH_9B_DWORDS (LRH_9B_BYTES / sizeof(u32))72 73/* 24Bits for qpn, upper 8Bits reserved */74struct opa_16b_mgmt {75 __be32 dest_qpn;76 __be32 src_qpn;77};78 79struct hfi1_16b_header {80 u32 lrh[4];81 union {82 struct {83 struct ib_grh grh;84 struct ib_other_headers oth;85 } l;86 struct ib_other_headers oth;87 struct opa_16b_mgmt mgmt;88 } u;89} __packed;90 91struct hfi1_opa_header {92 union {93 struct ib_header ibh; /* 9B header */94 struct hfi1_16b_header opah; /* 16B header */95 };96 u8 hdr_type; /* 9B or 16B */97} __packed;98 99struct hfi1_ahg_info {100 u32 ahgdesc[2];101 u16 tx_flags;102 u8 ahgcount;103 u8 ahgidx;104};105 106struct hfi1_sdma_header {107 __le64 pbc;108 struct hfi1_opa_header hdr;109} __packed;110 111/*112 * hfi1 specific data structures that will be hidden from rvt after the queue113 * pair is made common114 */115struct hfi1_qp_priv {116 struct hfi1_ahg_info *s_ahg; /* ahg info for next header */117 struct sdma_engine *s_sde; /* current sde */118 struct send_context *s_sendcontext; /* current sendcontext */119 struct hfi1_ctxtdata *rcd; /* QP's receive context */120 struct page **pages; /* for TID page scan */121 u32 tid_enqueue; /* saved when tid waited */122 u8 s_sc; /* SC[0..4] for next packet */123 struct iowait s_iowait;124 struct timer_list s_tid_timer; /* for timing tid wait */125 struct timer_list s_tid_retry_timer; /* for timing tid ack */126 struct list_head tid_wait; /* for queueing tid space */127 struct hfi1_opfn_data opfn;128 struct tid_flow_state flow_state;129 struct tid_rdma_qp_params tid_rdma;130 struct rvt_qp *owner;131 u16 s_running_pkt_size;132 u8 hdr_type; /* 9B or 16B */133 struct rvt_sge_state tid_ss; /* SGE state pointer for 2nd leg */134 atomic_t n_requests; /* # of TID RDMA requests in the */135 /* queue */136 atomic_t n_tid_requests; /* # of sent TID RDMA requests */137 unsigned long tid_timer_timeout_jiffies;138 unsigned long tid_retry_timeout_jiffies;139 140 /* variables for the TID RDMA SE state machine */141 u8 s_state;142 u8 s_retry;143 u8 rnr_nak_state; /* RNR NAK state */144 u8 s_nak_state;145 u32 s_nak_psn;146 u32 s_flags;147 u32 s_tid_cur;148 u32 s_tid_head;149 u32 s_tid_tail;150 u32 r_tid_head; /* Most recently added TID RDMA request */151 u32 r_tid_tail; /* the last completed TID RDMA request */152 u32 r_tid_ack; /* the TID RDMA request to be ACK'ed */153 u32 r_tid_alloc; /* Request for which we are allocating resources */154 u32 pending_tid_w_segs; /* Num of pending tid write segments */155 u32 pending_tid_w_resp; /* Num of pending tid write responses */156 u32 alloc_w_segs; /* Number of segments for which write */157 /* resources have been allocated for this QP */158 159 /* For TID RDMA READ */160 u32 tid_r_reqs; /* Num of tid reads requested */161 u32 tid_r_comp; /* Num of tid reads completed */162 u32 pending_tid_r_segs; /* Num of pending tid read segments */163 u16 pkts_ps; /* packets per segment */164 u8 timeout_shift; /* account for number of packets per segment */165 166 u32 r_next_psn_kdeth;167 u32 r_next_psn_kdeth_save;168 u32 s_resync_psn;169 u8 sync_pt; /* Set when QP reaches sync point */170 u8 resync;171};172 173#define HFI1_QP_WQE_INVALID ((u32)-1)174 175struct hfi1_swqe_priv {176 struct tid_rdma_request tid_req;177 struct rvt_sge_state ss; /* Used for TID RDMA READ Request */178};179 180struct hfi1_ack_priv {181 struct rvt_sge_state ss; /* used for TID WRITE RESP */182 struct tid_rdma_request tid_req;183};184 185/*186 * This structure is used to hold commonly lookedup and computed values during187 * the send engine progress.188 */189struct iowait_work;190struct hfi1_pkt_state {191 struct hfi1_ibdev *dev;192 struct hfi1_ibport *ibp;193 struct hfi1_pportdata *ppd;194 struct verbs_txreq *s_txreq;195 struct iowait_work *wait;196 unsigned long flags;197 unsigned long timeout;198 unsigned long timeout_int;199 int cpu;200 u8 opcode;201 bool in_thread;202 bool pkts_sent;203};204 205#define HFI1_PSN_CREDIT 16206 207struct hfi1_opcode_stats {208 u64 n_packets; /* number of packets */209 u64 n_bytes; /* total number of bytes */210};211 212struct hfi1_opcode_stats_perctx {213 struct hfi1_opcode_stats stats[256];214};215 216static inline void inc_opstats(217 u32 tlen,218 struct hfi1_opcode_stats *stats)219{220#ifdef CONFIG_DEBUG_FS221 stats->n_bytes += tlen;222 stats->n_packets++;223#endif224}225 226struct hfi1_ibport {227 struct rvt_qp __rcu *qp[2];228 struct rvt_ibport rvp;229 230 /* the first 16 entries are sl_to_vl for !OPA */231 u8 sl_to_sc[32];232 u8 sc_to_sl[32];233};234 235struct hfi1_ibdev {236 struct rvt_dev_info rdi; /* Must be first */237 238 /* QP numbers are shared by all IB ports */239 /* protect txwait list */240 seqlock_t txwait_lock ____cacheline_aligned_in_smp;241 struct list_head txwait; /* list for wait verbs_txreq */242 struct list_head memwait; /* list for wait kernel memory */243 struct kmem_cache *verbs_txreq_cache;244 u64 n_txwait;245 u64 n_kmem_wait;246 u64 n_tidwait;247 248 /* protect iowait lists */249 seqlock_t iowait_lock ____cacheline_aligned_in_smp;250 u64 n_piowait;251 u64 n_piodrain;252 struct timer_list mem_timer;253 254#ifdef CONFIG_DEBUG_FS255 /* per HFI debugfs */256 struct dentry *hfi1_ibdev_dbg;257 /* per HFI symlinks to above */258 struct dentry *hfi1_ibdev_link;259#ifdef CONFIG_FAULT_INJECTION260 struct fault *fault;261#endif262#endif263};264 265static inline struct hfi1_ibdev *to_idev(struct ib_device *ibdev)266{267 struct rvt_dev_info *rdi;268 269 rdi = container_of(ibdev, struct rvt_dev_info, ibdev);270 return container_of(rdi, struct hfi1_ibdev, rdi);271}272 273static inline struct rvt_qp *iowait_to_qp(struct iowait *s_iowait)274{275 struct hfi1_qp_priv *priv;276 277 priv = container_of(s_iowait, struct hfi1_qp_priv, s_iowait);278 return priv->owner;279}280 281/*282 * This must be called with s_lock held.283 */284void hfi1_bad_pkey(struct hfi1_ibport *ibp, u32 key, u32 sl,285 u32 qp1, u32 qp2, u32 lid1, u32 lid2);286void hfi1_cap_mask_chg(struct rvt_dev_info *rdi, u32 port_num);287void hfi1_sys_guid_chg(struct hfi1_ibport *ibp);288void hfi1_node_desc_chg(struct hfi1_ibport *ibp);289int hfi1_process_mad(struct ib_device *ibdev, int mad_flags, u32 port,290 const struct ib_wc *in_wc, const struct ib_grh *in_grh,291 const struct ib_mad *in_mad, struct ib_mad *out_mad,292 size_t *out_mad_size, u16 *out_mad_pkey_index);293 294/*295 * The PSN_MASK and PSN_SHIFT allow for296 * 1) comparing two PSNs297 * 2) returning the PSN with any upper bits masked298 * 3) returning the difference between to PSNs299 *300 * The number of significant bits in the PSN must301 * necessarily be at least one bit less than302 * the container holding the PSN.303 */304#define PSN_MASK 0x7FFFFFFF305#define PSN_SHIFT 1306#define PSN_MODIFY_MASK 0xFFFFFF307 308/*309 * Compare two PSNs310 * Returns an integer <, ==, or > than zero.311 */312static inline int cmp_psn(u32 a, u32 b)313{314 return (((int)a) - ((int)b)) << PSN_SHIFT;315}316 317/*318 * Return masked PSN319 */320static inline u32 mask_psn(u32 a)321{322 return a & PSN_MASK;323}324 325/*326 * Return delta between two PSNs327 */328static inline u32 delta_psn(u32 a, u32 b)329{330 return (((int)a - (int)b) << PSN_SHIFT) >> PSN_SHIFT;331}332 333static inline struct tid_rdma_request *wqe_to_tid_req(struct rvt_swqe *wqe)334{335 return &((struct hfi1_swqe_priv *)wqe->priv)->tid_req;336}337 338static inline struct tid_rdma_request *ack_to_tid_req(struct rvt_ack_entry *e)339{340 return &((struct hfi1_ack_priv *)e->priv)->tid_req;341}342 343/*344 * Look through all the active flows for a TID RDMA request and find345 * the one (if it exists) that contains the specified PSN.346 */347static inline u32 __full_flow_psn(struct flow_state *state, u32 psn)348{349 return mask_psn((state->generation << HFI1_KDETH_BTH_SEQ_SHIFT) |350 (psn & HFI1_KDETH_BTH_SEQ_MASK));351}352 353static inline u32 full_flow_psn(struct tid_rdma_flow *flow, u32 psn)354{355 return __full_flow_psn(&flow->flow_state, psn);356}357 358struct verbs_txreq;359void hfi1_put_txreq(struct verbs_txreq *tx);360 361int hfi1_verbs_send(struct rvt_qp *qp, struct hfi1_pkt_state *ps);362 363void hfi1_cnp_rcv(struct hfi1_packet *packet);364 365void hfi1_uc_rcv(struct hfi1_packet *packet);366 367void hfi1_rc_rcv(struct hfi1_packet *packet);368 369void hfi1_rc_hdrerr(370 struct hfi1_ctxtdata *rcd,371 struct hfi1_packet *packet,372 struct rvt_qp *qp);373 374u8 ah_to_sc(struct ib_device *ibdev, struct rdma_ah_attr *ah_attr);375 376void hfi1_rc_verbs_aborted(struct rvt_qp *qp, struct hfi1_opa_header *opah);377void hfi1_rc_send_complete(struct rvt_qp *qp, struct hfi1_opa_header *opah);378 379void hfi1_ud_rcv(struct hfi1_packet *packet);380 381int hfi1_lookup_pkey_idx(struct hfi1_ibport *ibp, u16 pkey);382 383void hfi1_migrate_qp(struct rvt_qp *qp);384 385int hfi1_check_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr,386 int attr_mask, struct ib_udata *udata);387 388void hfi1_modify_qp(struct rvt_qp *qp, struct ib_qp_attr *attr,389 int attr_mask, struct ib_udata *udata);390void hfi1_restart_rc(struct rvt_qp *qp, u32 psn, int wait);391int hfi1_setup_wqe(struct rvt_qp *qp, struct rvt_swqe *wqe,392 bool *call_send);393 394int hfi1_ruc_check_hdr(struct hfi1_ibport *ibp, struct hfi1_packet *packet);395 396u32 hfi1_make_grh(struct hfi1_ibport *ibp, struct ib_grh *hdr,397 const struct ib_global_route *grh, u32 hwords, u32 nwords);398 399void hfi1_make_ruc_header(struct rvt_qp *qp, struct ib_other_headers *ohdr,400 u32 bth0, u32 bth1, u32 bth2, int middle,401 struct hfi1_pkt_state *ps);402 403bool hfi1_schedule_send_yield(struct rvt_qp *qp, struct hfi1_pkt_state *ps,404 bool tid);405 406void _hfi1_do_send(struct work_struct *work);407 408void hfi1_do_send_from_rvt(struct rvt_qp *qp);409 410void hfi1_do_send(struct rvt_qp *qp, bool in_thread);411 412void hfi1_send_rc_ack(struct hfi1_packet *packet, bool is_fecn);413 414int hfi1_make_rc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps);415 416int hfi1_make_uc_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps);417 418int hfi1_make_ud_req(struct rvt_qp *qp, struct hfi1_pkt_state *ps);419 420int hfi1_register_ib_device(struct hfi1_devdata *);421 422void hfi1_unregister_ib_device(struct hfi1_devdata *);423 424void hfi1_kdeth_eager_rcv(struct hfi1_packet *packet);425 426void hfi1_kdeth_expected_rcv(struct hfi1_packet *packet);427 428void hfi1_ib_rcv(struct hfi1_packet *packet);429 430void hfi1_16B_rcv(struct hfi1_packet *packet);431 432unsigned hfi1_get_npkeys(struct hfi1_devdata *);433 434int hfi1_verbs_send_dma(struct rvt_qp *qp, struct hfi1_pkt_state *ps,435 u64 pbc);436 437int hfi1_verbs_send_pio(struct rvt_qp *qp, struct hfi1_pkt_state *ps,438 u64 pbc);439 440static inline bool opa_bth_is_migration(struct ib_other_headers *ohdr)441{442 return ohdr->bth[1] & cpu_to_be32(OPA_BTH_MIG_REQ);443}444 445void hfi1_wait_kmem(struct rvt_qp *qp);446 447static inline void hfi1_trdma_send_complete(struct rvt_qp *qp,448 struct rvt_swqe *wqe,449 enum ib_wc_status status)450{451 trdma_clean_swqe(qp, wqe);452 rvt_send_complete(qp, wqe, status);453}454 455extern const enum ib_wc_opcode ib_hfi1_wc_opcode[];456 457extern const u8 hdr_len_by_opcode[];458 459extern const int ib_rvt_state_ops[];460 461extern __be64 ib_hfi1_sys_image_guid; /* in network order */462 463extern unsigned int hfi1_max_cqes;464 465extern unsigned int hfi1_max_cqs;466 467extern unsigned int hfi1_max_qp_wrs;468 469extern unsigned int hfi1_max_qps;470 471extern unsigned int hfi1_max_sges;472 473extern unsigned int hfi1_max_mcast_grps;474 475extern unsigned int hfi1_max_mcast_qp_attached;476 477extern unsigned int hfi1_max_srqs;478 479extern unsigned int hfi1_max_srq_sges;480 481extern unsigned int hfi1_max_srq_wrs;482 483extern unsigned short piothreshold;484 485extern const u32 ib_hfi1_rnr_table[];486 487#endif /* HFI1_VERBS_H */488