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 */
hfi1_send_ok(struct rvt_qp * qp)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 */
clear_ahg(struct rvt_qp * qp)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 */
108