drivers/infiniband/hw/hfi1/qp.h

   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
  14 extern unsigned int hfi1_qp_table_size;
  15
  16 extern 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  */
  49 static 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  */
  62 static 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  */
  78 void hfi1_qp_wakeup(struct rvt_qp *qp, u32 flag);
  79
  80 struct sdma_engine *qp_to_sdma_engine(struct rvt_qp *qp, u8 sc5);
  81 struct send_context *qp_to_send_context(struct rvt_qp *qp, u8 sc5);
  82
  83 void qp_iter_print(struct seq_file *s, struct rvt_qp_iter *iter);
  84
  85 bool _hfi1_schedule_send(struct rvt_qp *qp);
  86 bool hfi1_schedule_send(struct rvt_qp *qp);
  87
  88 void hfi1_migrate_qp(struct rvt_qp *qp);
  89
  90 /*
  91  * Functions provided by hfi1 driver for rdmavt to use
  92  */
  93 void *qp_priv_alloc(struct rvt_dev_info *rdi, struct rvt_qp *qp);
  94 void qp_priv_free(struct rvt_dev_info *rdi, struct rvt_qp *qp);
  95 unsigned free_all_qps(struct rvt_dev_info *rdi);
  96 void notify_qp_reset(struct rvt_qp *qp);
  97 int get_pmtu_from_attr(struct rvt_dev_info *rdi, struct rvt_qp *qp,
  98                        struct ib_qp_attr *attr);
  99 void flush_qp_waiters(struct rvt_qp *qp);
 100 void notify_error_qp(struct rvt_qp *qp);
 101 void stop_send_queue(struct rvt_qp *qp);
 102 void quiesce_qp(struct rvt_qp *qp);
 103 u32 mtu_from_qp(struct rvt_dev_info *rdi, struct rvt_qp *qp, u32 pmtu);
 104 int mtu_to_path_mtu(u32 mtu);
 105 void hfi1_error_port_qps(struct hfi1_ibport *ibp, u8 sl);
 106 void hfi1_qp_unbusy(struct rvt_qp *qp, struct iowait_work *wait);
 107 #endif /* _QP_H */