1/* SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause */
  2/*
  3 * Copyright(c) 2015 - 2018 Intel Corporation.
  4 */
  5
  6#ifndef _QP_H
  7#define _QP_H
  8#include <linux/hash.h>
  9#include <rdma/rdmavt_qp.h>
 10#include "verbs.h"
 11#include "sdma.h"
 12#include "verbs_txreq.h"
 13
 14extern unsigned int hfi1_qp_table_size;
 15
 16extern const struct rvt_operation_params hfi1_post_parms[];
 17
 18/*
 19 * Driver specific s_flags starting at bit 31 down to HFI1_S_MIN_BIT_MASK
 20 *
 21 * HFI1_S_AHG_VALID - ahg header valid on chip
 22 * HFI1_S_AHG_CLEAR - have send engine clear ahg state
 23 * HFI1_S_WAIT_PIO_DRAIN - qp waiting for PIOs to drain
 24 * HFI1_S_WAIT_TID_SPACE - a QP is waiting for TID resource
 25 * HFI1_S_WAIT_TID_RESP - waiting for a TID RDMA WRITE response
 26 * HFI1_S_WAIT_HALT - halt the first leg send engine
 27 * HFI1_S_MIN_BIT_MASK - the lowest bit that can be used by hfi1
 28 */
 29#define HFI1_S_AHG_VALID         0x80000000
 30#define HFI1_S_AHG_CLEAR         0x40000000
 31#define HFI1_S_WAIT_PIO_DRAIN    0x20000000
 32#define HFI1_S_WAIT_TID_SPACE    0x10000000
 33#define HFI1_S_WAIT_TID_RESP     0x08000000
 34#define HFI1_S_WAIT_HALT         0x04000000
 35#define HFI1_S_MIN_BIT_MASK      0x01000000
 36
 37/*
 38 * overload wait defines
 39 */
 40
 41#define HFI1_S_ANY_WAIT_IO (RVT_S_ANY_WAIT_IO | HFI1_S_WAIT_PIO_DRAIN)
 42#define HFI1_S_ANY_WAIT (HFI1_S_ANY_WAIT_IO | RVT_S_ANY_WAIT_SEND)
 43#define HFI1_S_ANY_TID_WAIT_SEND (RVT_S_WAIT_SSN_CREDIT | RVT_S_WAIT_DMA)
 44
 45/*
 46 * Send if not busy or waiting for I/O and either
 47 * a RC response is pending or we can process send work requests.
 48 */
 49static inline int hfi1_send_ok(struct rvt_qp *qp)
 50{
 51	struct hfi1_qp_priv *priv = qp->priv;
 52
 53	return !(qp->s_flags & (RVT_S_BUSY | HFI1_S_ANY_WAIT_IO)) &&
 54		(verbs_txreq_queued(iowait_get_ib_work(&priv->s_iowait)) ||
 55		(qp->s_flags & RVT_S_RESP_PENDING) ||
 56		 !(qp->s_flags & RVT_S_ANY_WAIT_SEND));
 57}
 58
 59/*
 60 * free_ahg - clear ahg from QP
 61 */
 62static inline void clear_ahg(struct rvt_qp *qp)
 63{
 64	struct hfi1_qp_priv *priv = qp->priv;
 65
 66	priv->s_ahg->ahgcount = 0;
 67	qp->s_flags &= ~(HFI1_S_AHG_VALID | HFI1_S_AHG_CLEAR);
 68	if (priv->s_sde && qp->s_ahgidx >= 0)
 69		sdma_ahg_free(priv->s_sde, qp->s_ahgidx);
 70	qp->s_ahgidx = -1;
 71}
 72
 73/**
 74 * hfi1_qp_wakeup - wake up on the indicated event
 75 * @qp: the QP
 76 * @flag: flag the qp on which the qp is stalled
 77 */
 78void hfi1_qp_wakeup(struct rvt_qp *qp, u32 flag);
 79
 80struct sdma_engine *qp_to_sdma_engine(struct rvt_qp *qp, u8 sc5);
 81struct send_context *qp_to_send_context(struct rvt_qp *qp, u8 sc5);
 82
 83void qp_iter_print(struct seq_file *s, struct rvt_qp_iter *iter);
 84
 85bool _hfi1_schedule_send(struct rvt_qp *qp);
 86bool hfi1_schedule_send(struct rvt_qp *qp);
 87
 88void hfi1_migrate_qp(struct rvt_qp *qp);
 89
 90/*
 91 * Functions provided by hfi1 driver for rdmavt to use
 92 */
 93void *qp_priv_alloc(struct rvt_dev_info *rdi, struct rvt_qp *qp);
 94void qp_priv_free(struct rvt_dev_info *rdi, struct rvt_qp *qp);
 95unsigned free_all_qps(struct rvt_dev_info *rdi);
 96void notify_qp_reset(struct rvt_qp *qp);
 97int get_pmtu_from_attr(struct rvt_dev_info *rdi, struct rvt_qp *qp,
 98		       struct ib_qp_attr *attr);
 99void flush_qp_waiters(struct rvt_qp *qp);
100void notify_error_qp(struct rvt_qp *qp);
101void stop_send_queue(struct rvt_qp *qp);
102void quiesce_qp(struct rvt_qp *qp);
103u32 mtu_from_qp(struct rvt_dev_info *rdi, struct rvt_qp *qp, u32 pmtu);
104int mtu_to_path_mtu(u32 mtu);
105void hfi1_error_port_qps(struct hfi1_ibport *ibp, u8 sl);
106void hfi1_qp_unbusy(struct rvt_qp *qp, struct iowait_work *wait);
107#endif /* _QP_H */