static void cleanup_rd_atomic_resources(struct rxe_qp *qp) { int i; struct resp_res *res; if (qp->resp.resources) { for (i = 0; i < qp->attr.max_dest_rd_atomic; i++) { res = &qp->resp.resources[i]; free_rd_atomic_resource(qp, res); } } }
static void free_rd_atomic_resources(struct rxe_qp *qp) { if (qp->resp.resources) { int i; for (i = 0; i < qp->attr.max_rd_atomic; i++) { struct resp_res *res = &qp->resp.resources[i]; free_rd_atomic_resource(qp, res); } kfree(qp->resp.resources); qp->resp.resources = NULL; } }
/* RDMA read response. If res is not NULL, then we have a current RDMA request * being processed or replayed. */ static enum resp_states read_reply(struct rxe_qp *qp, struct rxe_pkt_info *req_pkt) { struct rxe_pkt_info ack_pkt; struct sk_buff *skb; int mtu = qp->mtu; enum resp_states state; int payload; int opcode; int err; struct resp_res *res = qp->resp.res; u32 icrc; u32 *p; if (!res) { /* This is the first time we process that request. Get a * resource */ res = &qp->resp.resources[qp->resp.res_head]; free_rd_atomic_resource(qp, res); rxe_advance_resp_resource(qp); res->type = RXE_READ_MASK; res->replay = 0; res->read.va = qp->resp.va; res->read.va_org = qp->resp.va; res->first_psn = req_pkt->psn; if (reth_len(req_pkt)) { res->last_psn = (req_pkt->psn + (reth_len(req_pkt) + mtu - 1) / mtu - 1) & BTH_PSN_MASK; } else { res->last_psn = res->first_psn; } res->cur_psn = req_pkt->psn; res->read.resid = qp->resp.resid; res->read.length = qp->resp.resid; res->read.rkey = qp->resp.rkey; /* note res inherits the reference to mr from qp */ res->read.mr = qp->resp.mr; qp->resp.mr = NULL; qp->resp.res = res; res->state = rdatm_res_state_new; } if (res->state == rdatm_res_state_new) { if (res->read.resid <= mtu) opcode = IB_OPCODE_RC_RDMA_READ_RESPONSE_ONLY; else opcode = IB_OPCODE_RC_RDMA_READ_RESPONSE_FIRST; } else { if (res->read.resid > mtu) opcode = IB_OPCODE_RC_RDMA_READ_RESPONSE_MIDDLE; else opcode = IB_OPCODE_RC_RDMA_READ_RESPONSE_LAST; } res->state = rdatm_res_state_next; payload = min_t(int, res->read.resid, mtu); skb = prepare_ack_packet(qp, req_pkt, &ack_pkt, opcode, payload, res->cur_psn, AETH_ACK_UNLIMITED, &icrc); if (!skb) return RESPST_ERR_RNR; err = rxe_mem_copy(res->read.mr, res->read.va, payload_addr(&ack_pkt), payload, from_mem_obj, &icrc); if (err) pr_err("Failed copying memory\n"); p = payload_addr(&ack_pkt) + payload + bth_pad(&ack_pkt); *p = ~icrc; err = rxe_xmit_packet(qp, &ack_pkt, skb); if (err) { pr_err("Failed sending RDMA reply.\n"); return RESPST_ERR_RNR; } res->read.va += payload; res->read.resid -= payload; res->cur_psn = (res->cur_psn + 1) & BTH_PSN_MASK; if (res->read.resid > 0) { state = RESPST_DONE; } else { qp->resp.res = NULL; if (!res->replay) qp->resp.opcode = -1; if (psn_compare(res->cur_psn, qp->resp.psn) >= 0) qp->resp.psn = res->cur_psn; state = RESPST_CLEANUP; } return state; }