| 1 | /* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */ |
|---|---|
| 2 | /* |
| 3 | * Copyright(c) 2016 - 2018 Intel Corporation. |
| 4 | */ |
| 5 | |
| 6 | #ifndef HFI1_VERBS_TXREQ_H |
| 7 | #define HFI1_VERBS_TXREQ_H |
| 8 | |
| 9 | #include <linux/types.h> |
| 10 | #include <linux/slab.h> |
| 11 | |
| 12 | #include "verbs.h" |
| 13 | #include "sdma_txreq.h" |
| 14 | #include "iowait.h" |
| 15 | |
| 16 | struct verbs_txreq { |
| 17 | struct hfi1_sdma_header phdr; |
| 18 | struct sdma_txreq txreq; |
| 19 | struct rvt_qp *qp; |
| 20 | struct rvt_swqe *wqe; |
| 21 | struct rvt_mregion *mr; |
| 22 | struct rvt_sge_state *ss; |
| 23 | struct sdma_engine *sde; |
| 24 | struct send_context *psc; |
| 25 | u16 hdr_dwords; |
| 26 | u16 s_cur_size; |
| 27 | }; |
| 28 | |
| 29 | struct hfi1_ibdev; |
| 30 | struct verbs_txreq *__get_txreq(struct hfi1_ibdev *dev, |
| 31 | struct rvt_qp *qp); |
| 32 | |
| 33 | #define VERBS_TXREQ_GFP (GFP_ATOMIC | __GFP_NOWARN) |
| 34 | static inline struct verbs_txreq *get_txreq(struct hfi1_ibdev *dev, |
| 35 | struct rvt_qp *qp) |
| 36 | __must_hold(&qp->slock) |
| 37 | { |
| 38 | struct verbs_txreq *tx; |
| 39 | struct hfi1_qp_priv *priv = qp->priv; |
| 40 | |
| 41 | tx = kmem_cache_alloc(cachep: dev->verbs_txreq_cache, VERBS_TXREQ_GFP); |
| 42 | if (unlikely(!tx)) { |
| 43 | /* call slow path to get the lock */ |
| 44 | tx = __get_txreq(dev, qp); |
| 45 | if (!tx) |
| 46 | return tx; |
| 47 | } |
| 48 | tx->qp = qp; |
| 49 | tx->mr = NULL; |
| 50 | tx->sde = priv->s_sde; |
| 51 | tx->psc = priv->s_sendcontext; |
| 52 | /* so that we can test if the sdma descriptors are there */ |
| 53 | tx->txreq.num_desc = 0; |
| 54 | /* Set the header type */ |
| 55 | tx->phdr.hdr.hdr_type = priv->hdr_type; |
| 56 | tx->txreq.flags = 0; |
| 57 | return tx; |
| 58 | } |
| 59 | |
| 60 | static inline struct verbs_txreq *get_waiting_verbs_txreq(struct iowait_work *w) |
| 61 | { |
| 62 | struct sdma_txreq *stx; |
| 63 | |
| 64 | stx = iowait_get_txhead(wait: w); |
| 65 | if (stx) |
| 66 | return container_of(stx, struct verbs_txreq, txreq); |
| 67 | return NULL; |
| 68 | } |
| 69 | |
| 70 | static inline bool verbs_txreq_queued(struct iowait_work *w) |
| 71 | { |
| 72 | return iowait_packet_queued(wait: w); |
| 73 | } |
| 74 | |
| 75 | void hfi1_put_txreq(struct verbs_txreq *tx); |
| 76 | int verbs_txreq_init(struct hfi1_ibdev *dev); |
| 77 | void verbs_txreq_exit(struct hfi1_ibdev *dev); |
| 78 | |
| 79 | #endif /* HFI1_VERBS_TXREQ_H */ |
| 80 |