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(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(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(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