/* * Copyright (c) 2004 Topspin Communications. All rights reserved. * Copyright (c) 2005 Cisco Systems. All rights reserved. * Copyright (c) 2005 Mellanox Technologies. All rights reserved. * Copyright (c) 2004 Voltaire, Inc. All rights reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU * General Public License (GPL) Version 2, available from the file * COPYING in the main directory of this source tree, or the * OpenIB.org BSD license below: * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * - Redistributions of source code must retain the above * copyright notice, this list of conditions and the following * disclaimer. * * - Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. * * $Id: mthca_qp.c 1355 2004-12-17 15:23:43Z roland $ */ #include #include #include #include #include #include #include #include "mthca_dev.h" #include "mthca_cmd.h" #include "mthca_memfree.h" #include "mthca_wqe.h" enum { MTHCA_MAX_DIRECT_QP_SIZE = 4 * PAGE_SIZE, MTHCA_ACK_REQ_FREQ = 10, MTHCA_FLIGHT_LIMIT = 9, MTHCA_UD_HEADER_SIZE = 72, /* largest UD header possible */ MTHCA_INLINE_HEADER_SIZE = 4, /* data segment overhead for inline */ MTHCA_INLINE_CHUNK_SIZE = 16 /* inline data segment chunk */ }; enum { MTHCA_QP_STATE_RST = 0, MTHCA_QP_STATE_INIT = 1, MTHCA_QP_STATE_RTR = 2, MTHCA_QP_STATE_RTS = 3, MTHCA_QP_STATE_SQE = 4, MTHCA_QP_STATE_SQD = 5, MTHCA_QP_STATE_ERR = 6, MTHCA_QP_STATE_DRAINING = 7 }; enum { MTHCA_QP_ST_RC = 0x0, MTHCA_QP_ST_UC = 0x1, MTHCA_QP_ST_RD = 0x2, MTHCA_QP_ST_UD = 0x3, MTHCA_QP_ST_MLX = 0x7 }; enum { MTHCA_QP_PM_MIGRATED = 0x3, MTHCA_QP_PM_ARMED = 0x0, MTHCA_QP_PM_REARM = 0x1 }; enum { /* qp_context flags */ MTHCA_QP_BIT_DE = 1 << 8, /* params1 */ MTHCA_QP_BIT_SRE = 1 << 15, MTHCA_QP_BIT_SWE = 1 << 14, MTHCA_QP_BIT_SAE = 1 << 13, MTHCA_QP_BIT_SIC = 1 << 4, MTHCA_QP_BIT_SSC = 1 << 3, /* params2 */ MTHCA_QP_BIT_RRE = 1 << 15, MTHCA_QP_BIT_RWE = 1 << 14, MTHCA_QP_BIT_RAE = 1 << 13, MTHCA_QP_BIT_RIC = 1 << 4, MTHCA_QP_BIT_RSC = 1 << 3 }; enum { MTHCA_SEND_DOORBELL_FENCE = 1 << 5 }; struct mthca_qp_path { __be32 port_pkey; u8 rnr_retry; u8 g_mylmc; __be16 rlid; u8 ackto; u8 mgid_index; u8 static_rate; u8 hop_limit; __be32 sl_tclass_flowlabel; u8 rgid[16]; } __attribute__((packed)); struct mthca_qp_context { __be32 flags; __be32 tavor_sched_queue; /* Reserved on Arbel */ u8 mtu_msgmax; u8 rq_size_stride; /* Reserved on Tavor */ u8 sq_size_stride; /* Reserved on Tavor */ u8 rlkey_arbel_sched_queue; /* Reserved on Tavor */ __be32 usr_page; __be32 local_qpn; __be32 remote_qpn; u32 reserved1[2]; struct mthca_qp_path pri_path; struct mthca_qp_path alt_path; __be32 rdd; __be32 pd; __be32 wqe_base; __be32 wqe_lkey; __be32 params1; __be32 reserved2; __be32 next_send_psn; __be32 cqn_snd; __be32 snd_wqe_base_l; /* Next send WQE on Tavor */ __be32 snd_db_index; /* (debugging only entries) */ __be32 last_acked_psn; __be32 ssn; __be32 params2; __be32 rnr_nextrecvpsn; __be32 ra_buff_indx; __be32 cqn_rcv; __be32 rcv_wqe_base_l; /* Next recv WQE on Tavor */ __be32 rcv_db_index; /* (debugging only entries) */ __be32 qkey; __be32 srqn; __be32 rmsn; __be16 rq_wqe_counter; /* reserved on Tavor */ __be16 sq_wqe_counter; /* reserved on Tavor */ u32 reserved3[18]; } __attribute__((packed)); struct mthca_qp_param { __be32 opt_param_mask; u32 reserved1; struct mthca_qp_context context; u32 reserved2[62]; } __attribute__((packed)); enum { MTHCA_QP_OPTPAR_ALT_ADDR_PATH = 1 << 0, MTHCA_QP_OPTPAR_RRE = 1 << 1, MTHCA_QP_OPTPAR_RAE = 1 << 2, MTHCA_QP_OPTPAR_RWE = 1 << 3, MTHCA_QP_OPTPAR_PKEY_INDEX = 1 << 4, MTHCA_QP_OPTPAR_Q_KEY = 1 << 5, MTHCA_QP_OPTPAR_RNR_TIMEOUT = 1 << 6, MTHCA_QP_OPTPAR_PRIMARY_ADDR_PATH = 1 << 7, MTHCA_QP_OPTPAR_SRA_MAX = 1 << 8, MTHCA_QP_OPTPAR_RRA_MAX = 1 << 9, MTHCA_QP_OPTPAR_PM_STATE = 1 << 10, MTHCA_QP_OPTPAR_PORT_NUM = 1 << 11, MTHCA_QP_OPTPAR_RETRY_COUNT = 1 << 12, MTHCA_QP_OPTPAR_ALT_RNR_RETRY = 1 << 13, MTHCA_QP_OPTPAR_ACK_TIMEOUT = 1 << 14, MTHCA_QP_OPTPAR_RNR_RETRY = 1 << 15, MTHCA_QP_OPTPAR_SCHED_QUEUE = 1 << 16 }; static const u8 mthca_opcode[] = { [IB_WR_SEND] = MTHCA_OPCODE_SEND, [IB_WR_SEND_WITH_IMM] = MTHCA_OPCODE_SEND_IMM, [IB_WR_RDMA_WRITE] = MTHCA_OPCODE_RDMA_WRITE, [IB_WR_RDMA_WRITE_WITH_IMM] = MTHCA_OPCODE_RDMA_WRITE_IMM, [IB_WR_RDMA_READ] = MTHCA_OPCODE_RDMA_READ, [IB_WR_ATOMIC_CMP_AND_SWP] = MTHCA_OPCODE_ATOMIC_CS, [IB_WR_ATOMIC_FETCH_AND_ADD] = MTHCA_OPCODE_ATOMIC_FA, }; static int is_sqp(struct mthca_dev *dev, struct mthca_qp *qp) { return qp->qpn >= dev->qp_table.sqp_start && qp->qpn <= dev->qp_table.sqp_start + 3; } static int is_qp0(struct mthca_dev *dev, struct mthca_qp *qp) { return qp->qpn >= dev->qp_table.sqp_start && qp->qpn <= dev->qp_table.sqp_start + 1; } static void *get_recv_wqe(struct mthca_qp *qp, int n) { if (qp->is_direct) return qp->queue.direct.buf + (n << qp->rq.wqe_shift); else return qp->queue.page_list[(n << qp->rq.wqe_shift) >> PAGE_SHIFT].buf + ((n << qp->rq.wqe_shift) & (PAGE_SIZE - 1)); } static void *get_send_wqe(struct mthca_qp *qp, int n) { if (qp->is_direct) return qp->queue.direct.buf + qp->send_wqe_offset + (n << qp->sq.wqe_shift); else return qp->queue.page_list[(qp->send_wqe_offset + (n << qp->sq.wqe_shift)) >> PAGE_SHIFT].buf + ((qp->send_wqe_offset + (n << qp->sq.wqe_shift)) & (PAGE_SIZE - 1)); } static void mthca_wq_reset(struct mthca_wq *wq) { wq->next_ind = 0; wq->last_comp = wq->max - 1; wq->head = 0; wq->tail = 0; } void mthca_qp_event(struct mthca_dev *dev, u32 qpn, enum ib_event_type event_type) { struct mthca_qp *qp; struct ib_event event; spin_lock(&dev->qp_table.lock); qp = mthca_array_get(&dev->qp_table.qp, qpn & (dev->limits.num_qps - 1)); if (qp) ++qp->refcount; spin_unlock(&dev->qp_table.lock); if (!qp) { mthca_warn(dev, "Async event for bogus QP %08x\n", qpn); return; } if (event_type == IB_EVENT_PATH_MIG) qp->port = qp->alt_port; event.device = &dev->ib_dev; event.event = event_type; event.element.qp = &qp->ibqp; if (qp->ibqp.event_handler) qp->ibqp.event_handler(&event, qp->ibqp.qp_context); spin_lock(&dev->qp_table.lock); if (!--qp->refcount) wake_up(&qp->wait); spin_unlock(&dev->qp_table.lock); } static int to_mthca_state(enum ib_qp_state ib_state) { switch (ib_state) { case IB_QPS_RESET: return MTHCA_QP_STATE_RST; case IB_QPS_INIT: return MTHCA_QP_STATE_INIT; case IB_QPS_RTR: return MTHCA_QP_STATE_RTR; case IB_QPS_RTS: return MTHCA_QP_STATE_RTS; case IB_QPS_SQD: return MTHCA_QP_STATE_SQD; case IB_QPS_SQE: return MTHCA_QP_STATE_SQE; case IB_QPS_ERR: return MTHCA_QP_STATE_ERR; default: return -1; } } enum { RC, UC, UD, RD, RDEE, MLX, NUM_TRANS }; static int to_mthca_st(int transport) { switch (transport) { case RC: return MTHCA_QP_ST_RC; case UC: return MTHCA_QP_ST_UC; case UD: return MTHCA_QP_ST_UD; case RD: return MTHCA_QP_ST_RD; case MLX: return MTHCA_QP_ST_MLX; default: return -1; } } static void store_attrs(struct mthca_sqp *sqp, const struct ib_qp_attr *attr, int attr_mask) { if (attr_mask & IB_QP_PKEY_INDEX) sqp->pkey_index = attr->pkey_index; if (attr_mask & IB_QP_QKEY) sqp->qkey = attr->qkey; if (attr_mask & IB_QP_SQ_PSN) sqp->send_psn = attr->sq_psn; } static void init_port(struct mthca_dev *dev, int port) { int err; u8 status; struct mthca_init_ib_param param; memset(¶m, 0, sizeof param); param.port_width = dev->limits.port_width_cap; param.vl_cap = dev->limits.vl_cap; param.mtu_cap = dev->limits.mtu_cap; param.gid_cap = dev->limits.gid_table_len; param.pkey_cap = dev->limits.pkey_table_len; err = mthca_INIT_IB(dev, ¶m, port, &status); if (err) mthca_warn(dev, "INIT_IB failed, return code %d.\n", err); if (status) mthca_warn(dev, "INIT_IB returned status %02x.\n", status); } static __be32 get_hw_access_flags(struct mthca_qp *qp, const struct ib_qp_attr *attr, int attr_mask) { u8 dest_rd_atomic; u32 access_flags; u32 hw_access_flags = 0; if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) dest_rd_atomic = attr->max_dest_rd_atomic; else dest_rd_atomic = qp->resp_depth; if (attr_mask & IB_QP_ACCESS_FLAGS) access_flags = attr->qp_access_flags; else access_flags = qp->atomic_rd_en; if (!dest_rd_atomic) access_flags &= IB_ACCESS_REMOTE_WRITE; if (access_flags & IB_ACCESS_REMOTE_READ) hw_access_flags |= MTHCA_QP_BIT_RRE; if (access_flags & IB_ACCESS_REMOTE_ATOMIC) hw_access_flags |= MTHCA_QP_BIT_RAE; if (access_flags & IB_ACCESS_REMOTE_WRITE) hw_access_flags |= MTHCA_QP_BIT_RWE; return cpu_to_be32(hw_access_flags); } static inline enum ib_qp_state to_ib_qp_state(int mthca_state) { switch (mthca_state) { case MTHCA_QP_STATE_RST: return IB_QPS_RESET; case MTHCA_QP_STATE_INIT: return IB_QPS_INIT; case MTHCA_QP_STATE_RTR: return IB_QPS_RTR; case MTHCA_QP_STATE_RTS: return IB_QPS_RTS; case MTHCA_QP_STATE_DRAINING: case MTHCA_QP_STATE_SQD: return IB_QPS_SQD; case MTHCA_QP_STATE_SQE: return IB_QPS_SQE; case MTHCA_QP_STATE_ERR: return IB_QPS_ERR; default: return -1; } } static inline enum ib_mig_state to_ib_mig_state(int mthca_mig_state) { switch (mthca_mig_state) { case 0: return IB_MIG_ARMED; case 1: return IB_MIG_REARM; case 3: return IB_MIG_MIGRATED; default: return -1; } } static int to_ib_qp_access_flags(int mthca_flags) { int ib_flags = 0; if (mthca_flags & MTHCA_QP_BIT_RRE) ib_flags |= IB_ACCESS_REMOTE_READ; if (mthca_flags & MTHCA_QP_BIT_RWE) ib_flags |= IB_ACCESS_REMOTE_WRITE; if (mthca_flags & MTHCA_QP_BIT_RAE) ib_flags |= IB_ACCESS_REMOTE_ATOMIC; return ib_flags; } static void to_ib_ah_attr(struct mthca_dev *dev, struct ib_ah_attr *ib_ah_attr, struct mthca_qp_path *path) { memset(ib_ah_attr, 0, sizeof *ib_ah_attr); ib_ah_attr->port_num = (be32_to_cpu(path->port_pkey) >> 24) & 0x3; if (ib_ah_attr->port_num == 0 || ib_ah_attr->port_num > dev->limits.num_ports) return; ib_ah_attr->dlid = be16_to_cpu(path->rlid); ib_ah_attr->sl = be32_to_cpu(path->sl_tclass_flowlabel) >> 28; ib_ah_attr->src_path_bits = path->g_mylmc & 0x7f; ib_ah_attr->static_rate = mthca_rate_to_ib(dev, path->static_rate & 0xf, ib_ah_attr->port_num); ib_ah_attr->ah_flags = (path->g_mylmc & (1 << 7)) ? IB_AH_GRH : 0; if (ib_ah_attr->ah_flags) { ib_ah_attr->grh.sgid_index = path->mgid_index & (dev->limits.gid_table_len - 1); ib_ah_attr->grh.hop_limit = path->hop_limit; ib_ah_attr->grh.traffic_class = (be32_to_cpu(path->sl_tclass_flowlabel) >> 20) & 0xff; ib_ah_attr->grh.flow_label = be32_to_cpu(path->sl_tclass_flowlabel) & 0xfffff; memcpy(ib_ah_attr->grh.dgid.raw, path->rgid, sizeof ib_ah_attr->grh.dgid.raw); } } int mthca_query_qp(struct ib_qp *ibqp, struct ib_qp_attr *qp_attr, int qp_attr_mask, struct ib_qp_init_attr *qp_init_attr) { struct mthca_dev *dev = to_mdev(ibqp->device); struct mthca_qp *qp = to_mqp(ibqp); int err = 0; struct mthca_mailbox *mailbox = NULL; struct mthca_qp_param *qp_param; struct mthca_qp_context *context; int mthca_state; u8 status; if (qp->state == IB_QPS_RESET) { qp_attr->qp_state = IB_QPS_RESET; goto done; } mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); if (IS_ERR(mailbox)) return PTR_ERR(mailbox); err = mthca_QUERY_QP(dev, qp->qpn, 0, mailbox, &status); if (err) goto out; if (status) { mthca_warn(dev, "QUERY_QP returned status %02x\n", status); err = -EINVAL; goto out; } qp_param = mailbox->buf; context = &qp_param->context; mthca_state = be32_to_cpu(context->flags) >> 28; qp_attr->qp_state = to_ib_qp_state(mthca_state); qp_attr->path_mtu = context->mtu_msgmax >> 5; qp_attr->path_mig_state = to_ib_mig_state((be32_to_cpu(context->flags) >> 11) & 0x3); qp_attr->qkey = be32_to_cpu(context->qkey); qp_attr->rq_psn = be32_to_cpu(context->rnr_nextrecvpsn) & 0xffffff; qp_attr->sq_psn = be32_to_cpu(context->next_send_psn) & 0xffffff; qp_attr->dest_qp_num = be32_to_cpu(context->remote_qpn) & 0xffffff; qp_attr->qp_access_flags = to_ib_qp_access_flags(be32_to_cpu(context->params2)); if (qp->transport == RC || qp->transport == UC) { to_ib_ah_attr(dev, &qp_attr->ah_attr, &context->pri_path); to_ib_ah_attr(dev, &qp_attr->alt_ah_attr, &context->alt_path); qp_attr->alt_pkey_index = be32_to_cpu(context->alt_path.port_pkey) & 0x7f; qp_attr->alt_port_num = qp_attr->alt_ah_attr.port_num; } qp_attr->pkey_index = be32_to_cpu(context->pri_path.port_pkey) & 0x7f; qp_attr->port_num = (be32_to_cpu(context->pri_path.port_pkey) >> 24) & 0x3; /* qp_attr->en_sqd_async_notify is only applicable in modify qp */ qp_attr->sq_draining = mthca_state == MTHCA_QP_STATE_DRAINING; qp_attr->max_rd_atomic = 1 << ((be32_to_cpu(context->params1) >> 21) & 0x7); qp_attr->max_dest_rd_atomic = 1 << ((be32_to_cpu(context->params2) >> 21) & 0x7); qp_attr->min_rnr_timer = (be32_to_cpu(context->rnr_nextrecvpsn) >> 24) & 0x1f; qp_attr->timeout = context->pri_path.ackto >> 3; qp_attr->retry_cnt = (be32_to_cpu(context->params1) >> 16) & 0x7; qp_attr->rnr_retry = context->pri_path.rnr_retry >> 5; qp_attr->alt_timeout = context->alt_path.ackto >> 3; done: qp_attr->cur_qp_state = qp_attr->qp_state; qp_attr->cap.max_send_wr = qp->sq.max; qp_attr->cap.max_recv_wr = qp->rq.max; qp_attr->cap.max_send_sge = qp->sq.max_gs; qp_attr->cap.max_recv_sge = qp->rq.max_gs; qp_attr->cap.max_inline_data = qp->max_inline_data; qp_init_attr->cap = qp_attr->cap; out: mthca_free_mailbox(dev, mailbox); return err; } static int mthca_path_set(struct mthca_dev *dev, const struct ib_ah_attr *ah, struct mthca_qp_path *path, u8 port) { path->g_mylmc = ah->src_path_bits & 0x7f; path->rlid = cpu_to_be16(ah->dlid); path->static_rate = mthca_get_rate(dev, ah->static_rate, port); if (ah->ah_flags & IB_AH_GRH) { if (ah->grh.sgid_index >= dev->limits.gid_table_len) { mthca_dbg(dev, "sgid_index (%u) too large. max is %d\n", ah->grh.sgid_index, dev->limits.gid_table_len-1); return -1; } path->g_mylmc |= 1 << 7; path->mgid_index = ah->grh.sgid_index; path->hop_limit = ah->grh.hop_limit; path->sl_tclass_flowlabel = cpu_to_be32((ah->sl << 28) | (ah->grh.traffic_class << 20) | (ah->grh.flow_label)); memcpy(path->rgid, ah->grh.dgid.raw, 16); } else path->sl_tclass_flowlabel = cpu_to_be32(ah->sl << 28); return 0; } static int __mthca_modify_qp(struct ib_qp *ibqp, const struct ib_qp_attr *attr, int attr_mask, enum ib_qp_state cur_state, enum ib_qp_state new_state) { struct mthca_dev *dev = to_mdev(ibqp->device); struct mthca_qp *qp = to_mqp(ibqp); struct mthca_mailbox *mailbox; struct mthca_qp_param *qp_param; struct mthca_qp_context *qp_context; u32 sqd_event = 0; u8 status; int err = -EINVAL; mailbox = mthca_alloc_mailbox(dev, GFP_KERNEL); if (IS_ERR(mailbox)) { err = PTR_ERR(mailbox); goto out; } qp_param = mailbox->buf; qp_context = &qp_param->context; memset(qp_param, 0, sizeof *qp_param); qp_context->flags = cpu_to_be32((to_mthca_state(new_state) << 28) | (to_mthca_st(qp->transport) << 16)); qp_context->flags |= cpu_to_be32(MTHCA_QP_BIT_DE); if (!(attr_mask & IB_QP_PATH_MIG_STATE)) qp_context->flags |= cpu_to_be32(MTHCA_QP_PM_MIGRATED << 11); else { qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_PM_STATE); switch (attr->path_mig_state) { case IB_MIG_MIGRATED: qp_context->flags |= cpu_to_be32(MTHCA_QP_PM_MIGRATED << 11); break; case IB_MIG_REARM: qp_context->flags |= cpu_to_be32(MTHCA_QP_PM_REARM << 11); break; case IB_MIG_ARMED: qp_context->flags |= cpu_to_be32(MTHCA_QP_PM_ARMED << 11); break; } } /* leave tavor_sched_queue as 0 */ if (qp->transport == MLX || qp->transport == UD) qp_context->mtu_msgmax = (IB_MTU_2048 << 5) | 11; else if (attr_mask & IB_QP_PATH_MTU) { if (attr->path_mtu < IB_MTU_256 || attr->path_mtu > IB_MTU_2048) { mthca_dbg(dev, "path MTU (%u) is invalid\n", attr->path_mtu); goto out_mailbox; } qp_context->mtu_msgmax = (attr->path_mtu << 5) | 31; } if (mthca_is_memfree(dev)) { if (qp->rq.max) qp_context->rq_size_stride = ilog2(qp->rq.max) << 3; qp_context->rq_size_stride |= qp->rq.wqe_shift - 4; if (qp->sq.max) qp_context->sq_size_stride = ilog2(qp->sq.max) << 3; qp_context->sq_size_stride |= qp->sq.wqe_shift - 4; } /* leave arbel_sched_queue as 0 */ if (qp->ibqp.uobject) qp_context->usr_page = cpu_to_be32(to_mucontext(qp->ibqp.uobject->context)->uar.index); else qp_context->usr_page = cpu_to_be32(dev->driver_uar.index); qp_context->local_qpn = cpu_to_be32(qp->qpn); if (attr_mask & IB_QP_DEST_QPN) { qp_context->remote_qpn = cpu_to_be32(attr->dest_qp_num); } if (qp->transport == MLX) qp_context->pri_path.port_pkey |= cpu_to_be32(qp->port << 24); else { if (attr_mask & IB_QP_PORT) { qp_context->pri_path.port_pkey |= cpu_to_be32(attr->port_num << 24); qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_PORT_NUM); } } if (attr_mask & IB_QP_PKEY_INDEX) { qp_context->pri_path.port_pkey |= cpu_to_be32(attr->pkey_index); qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_PKEY_INDEX); } if (attr_mask & IB_QP_RNR_RETRY) { qp_context->alt_path.rnr_retry = qp_context->pri_path.rnr_retry = attr->rnr_retry << 5; qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_RNR_RETRY | MTHCA_QP_OPTPAR_ALT_RNR_RETRY); } if (attr_mask & IB_QP_AV) { if (mthca_path_set(dev, &attr->ah_attr, &qp_context->pri_path, attr_mask & IB_QP_PORT ? attr->port_num : qp->port)) goto out_mailbox; qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_PRIMARY_ADDR_PATH); } if (ibqp->qp_type == IB_QPT_RC && cur_state == IB_QPS_INIT && new_state == IB_QPS_RTR) { u8 sched_queue = ibqp->uobject ? 0x2 : 0x1; if (mthca_is_memfree(dev)) qp_context->rlkey_arbel_sched_queue |= sched_queue; else qp_context->tavor_sched_queue |= cpu_to_be32(sched_queue); qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_SCHED_QUEUE); } if (attr_mask & IB_QP_TIMEOUT) { qp_context->pri_path.ackto = attr->timeout << 3; qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_ACK_TIMEOUT); } if (attr_mask & IB_QP_ALT_PATH) { if (attr->alt_pkey_index >= dev->limits.pkey_table_len) { mthca_dbg(dev, "Alternate P_Key index (%u) too large. max is %d\n", attr->alt_pkey_index, dev->limits.pkey_table_len-1); goto out_mailbox; } if (attr->alt_port_num == 0 || attr->alt_port_num > dev->limits.num_ports) { mthca_dbg(dev, "Alternate port number (%u) is invalid\n", attr->alt_port_num); goto out_mailbox; } if (mthca_path_set(dev, &attr->alt_ah_attr, &qp_context->alt_path, attr->alt_ah_attr.port_num)) goto out_mailbox; qp_context->alt_path.port_pkey |= cpu_to_be32(attr->alt_pkey_index | attr->alt_port_num << 24); qp_context->alt_path.ackto = attr->alt_timeout << 3; qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_ALT_ADDR_PATH); } /* leave rdd as 0 */ qp_context->pd = cpu_to_be32(to_mpd(ibqp->pd)->pd_num); /* leave wqe_base as 0 (we always create an MR based at 0 for WQs) */ qp_context->wqe_lkey = cpu_to_be32(qp->mr.ibmr.lkey); qp_context->params1 = cpu_to_be32((MTHCA_ACK_REQ_FREQ << 28) | (MTHCA_FLIGHT_LIMIT << 24) | MTHCA_QP_BIT_SWE); if (qp->sq_policy == IB_SIGNAL_ALL_WR) qp_context->params1 |= cpu_to_be32(MTHCA_QP_BIT_SSC); if (attr_mask & IB_QP_RETRY_CNT) { qp_context->params1 |= cpu_to_be32(attr->retry_cnt << 16); qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_RETRY_COUNT); } if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC) { if (attr->max_rd_atomic) { qp_context->params1 |= cpu_to_be32(MTHCA_QP_BIT_SRE | MTHCA_QP_BIT_SAE); qp_context->params1 |= cpu_to_be32(fls(attr->max_rd_atomic - 1) << 21); } qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_SRA_MAX); } if (attr_mask & IB_QP_SQ_PSN) qp_context->next_send_psn = cpu_to_be32(attr->sq_psn); qp_context->cqn_snd = cpu_to_be32(to_mcq(ibqp->send_cq)->cqn); if (mthca_is_memfree(dev)) { qp_context->snd_wqe_base_l = cpu_to_be32(qp->send_wqe_offset); qp_context->snd_db_index = cpu_to_be32(qp->sq.db_index); } if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) { if (attr->max_dest_rd_atomic) qp_context->params2 |= cpu_to_be32(fls(attr->max_dest_rd_atomic - 1) << 21); qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_RRA_MAX); } if (attr_mask & (IB_QP_ACCESS_FLAGS | IB_QP_MAX_DEST_RD_ATOMIC)) { qp_context->params2 |= get_hw_access_flags(qp, attr, attr_mask); qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_RWE | MTHCA_QP_OPTPAR_RRE | MTHCA_QP_OPTPAR_RAE); } qp_context->params2 |= cpu_to_be32(MTHCA_QP_BIT_RSC); if (ibqp->srq) qp_context->params2 |= cpu_to_be32(MTHCA_QP_BIT_RIC); if (attr_mask & IB_QP_MIN_RNR_TIMER) { qp_context->rnr_nextrecvpsn |= cpu_to_be32(attr->min_rnr_timer << 24); qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_RNR_TIMEOUT); } if (attr_mask & IB_QP_RQ_PSN) qp_context->rnr_nextrecvpsn |= cpu_to_be32(attr->rq_psn); qp_context->ra_buff_indx = cpu_to_be32(dev->qp_table.rdb_base + ((qp->qpn & (dev->limits.num_qps - 1)) * MTHCA_RDB_ENTRY_SIZE << dev->qp_table.rdb_shift)); qp_context->cqn_rcv = cpu_to_be32(to_mcq(ibqp->recv_cq)->cqn); if (mthca_is_memfree(dev)) qp_context->rcv_db_index = cpu_to_be32(qp->rq.db_index); if (attr_mask & IB_QP_QKEY) { qp_context->qkey = cpu_to_be32(attr->qkey); qp_param->opt_param_mask |= cpu_to_be32(MTHCA_QP_OPTPAR_Q_KEY); } if (ibqp->srq) qp_context->srqn = cpu_to_be32(1 << 24 | to_msrq(ibqp->srq)->srqn); if (cur_state == IB_QPS_RTS && new_state == IB_QPS_SQD && attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY && attr->en_sqd_async_notify) sqd_event = 1 << 31; err = mthca_MODIFY_QP(dev, cur_state, new_state, qp->qpn, 0, mailbox, sqd_event, &status); if (err) goto out_mailbox; if (status) { mthca_warn(dev, "modify QP %d->%d returned status %02x.\n", cur_state, new_state, status); err = -EINVAL; goto out_mailbox; } qp->state = new_state; if (attr_mask & IB_QP_ACCESS_FLAGS) qp->atomic_rd_en = attr->qp_access_flags; if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) qp->resp_depth = attr->max_dest_rd_atomic; if (attr_mask & IB_QP_PORT) qp->port = attr->port_num; if (attr_mask & IB_QP_ALT_PATH) qp->alt_port = attr->alt_port_num; if (is_sqp(dev, qp)) store_attrs(to_msqp(qp), attr, attr_mask); /* * If we moved QP0 to RTR, bring the IB link up; if we moved * QP0 to RESET or ERROR, bring the link back down. */ if (is_qp0(dev, qp)) { if (cur_state != IB_QPS_RTR && new_state == IB_QPS_RTR) init_port(dev, qp->port); if (cur_state != IB_QPS_RESET && cur_state != IB_QPS_ERR && (new_state == IB_QPS_RESET || new_state == IB_QPS_ERR)) mthca_CLOSE_IB(dev, qp->port, &status); } /* * If we moved a kernel QP to RESET, clean up all old CQ * entries and reinitialize the QP. */ if (new_state == IB_QPS_RESET && !qp->ibqp.uobject) { mthca_cq_clean(dev, to_mcq(qp->ibqp.recv_cq), qp->qpn, qp->ibqp.srq ? to_msrq(qp->ibqp.srq) : NULL); if (qp->ibqp.send_cq != qp->ibqp.recv_cq) mthca_cq_clean(dev, to_mcq(qp->ibqp.send_cq), qp->qpn, NULL); mthca_wq_reset(&qp->sq); qp->sq.last = get_send_wqe(qp, qp->sq.max - 1); mthca_wq_reset(&qp->rq); qp->rq.last = get_recv_wqe(qp, qp->rq.max - 1); if (mthca_is_memfree(dev)) { *qp->sq.db = 0; *qp->rq.db = 0; } } out_mailbox: mthca_free_mailbox(dev, mailbox); out: return err; } static const struct ib_qp_attr dummy_init_attr = { .port_num = 1 }; static const int dummy_init_attr_mask[] = { [IB_QPT_UD] = (IB_QP_PKEY_INDEX | IB_QP_PORT | IB_QP_QKEY), [IB_QPT_UC] = (IB_QP_PKEY_INDEX | IB_QP_PORT | IB_QP_ACCESS_FLAGS), [IB_QPT_RC] = (IB_QP_PKEY_INDEX | IB_QP_PORT | IB_QP_ACCESS_FLAGS), [IB_QPT_SMI] = (IB_QP_PKEY_INDEX | IB_QP_QKEY), [IB_QPT_GSI] = (IB_QP_PKEY_INDEX | IB_QP_QKEY), }; int mthca_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask, struct ib_udata *udata) { struct mthca_dev *dev = to_mdev(ibqp->device); struct mthca_qp *qp = to_mqp(ibqp); enum ib_qp_state cur_state, new_state; int err = -EINVAL; mutex_lock(&qp->mutex); if (attr_mask & IB_QP_CUR_STATE) { cur_state = attr->cur_qp_state; } else { spin_lock_irq(&qp->sq.lock); spin_lock(&qp->rq.lock); cur_state = qp->state; spin_unlock(&qp->rq.lock); spin_unlock_irq(&qp->sq.lock); } new_state = attr_mask & IB_QP_STATE ? attr->qp_state : cur_state; if (!ib_modify_qp_is_ok(cur_state, new_state, ibqp->qp_type, attr_mask)) { mthca_dbg(dev, "Bad QP transition (transport %d) " "%d->%d with attr 0x%08x\n", qp->transport, cur_state, new_state, attr_mask); goto out; } if ((attr_mask & IB_QP_PKEY_INDEX) && attr->pkey_index >= dev->limits.pkey_table_len) { mthca_dbg(dev, "P_Key index (%u) too large. max is %d\n", attr->pkey_index, dev->limits.pkey_table_len-1); goto out; } if ((attr_mask & IB_QP_PORT) && (attr->port_num == 0 || attr->port_num > dev->limits.num_ports)) { mthca_dbg(dev, "Port number (%u) is invalid\n", attr->port_num); goto out; } if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC && attr->max_rd_atomic > dev->limits.max_qp_init_rdma) { mthca_dbg(dev, "Max rdma_atomic as initiator %u too large (max is %d)\n", attr->max_rd_atomic, dev->limits.max_qp_init_rdma); goto out; } if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC && attr->max_dest_rd_atomic > 1 << dev->qp_table.rdb_shift) { mthca_dbg(dev, "Max rdma_atomic as responder %u too large (max %d)\n", attr->max_dest_rd_atomic, 1 << dev->qp_table.rdb_shift); goto out; } if (cur_state == new_state && cur_state == IB_QPS_RESET) { err = 0; goto out; } if (cur_state == IB_QPS_RESET && new_state == IB_QPS_ERR) { err = __mthca_modify_qp(ibqp, &dummy_init_attr, dummy_init_attr_mask[ibqp->qp_type], IB_QPS_RESET, IB_QPS_INIT); if (err) goto out; cur_state = IB_QPS_INIT; } err = __mthca_modify_qp(ibqp, attr, attr_mask, cur_state, new_state); out: mutex_unlock(&qp->mutex); return err; } static int mthca_max_data_size(struct mthca_dev *dev, struct mthca_qp *qp, int desc_sz) { /* * Calculate the maximum size of WQE s/g segments, excluding * the next segment and other non-data segments. */ int max_data_size = desc_sz - sizeof (struct mthca_next_seg); switch (qp->transport) { case MLX: max_data_size -= 2 * sizeof (struct mthca_data_seg); break; case UD: if (mthca_is_memfree(dev)) max_data_size -= sizeof (struct mthca_arbel_ud_seg); else max_data_size -= sizeof (struct mthca_tavor_ud_seg); break; default: max_data_size -= sizeof (struct mthca_raddr_seg); break; } return max_data_size; } static inline int mthca_max_inline_data(struct mthca_pd *pd, int max_data_size) { /* We don't support inline data for kernel QPs (yet). */ return pd->ibpd.uobject ? max_data_size - MTHCA_INLINE_HEADER_SIZE : 0; } static void mthca_adjust_qp_caps(struct mthca_dev *dev, struct mthca_pd *pd, struct mthca_qp *qp) { int max_data_size = mthca_max_data_size(dev, qp, min(dev->limits.max_desc_sz, 1 << qp->sq.wqe_shift)); qp->max_inline_data = mthca_max_inline_data(pd, max_data_size); qp->sq.max_gs = min_t(int, dev->limits.max_sg, max_data_size / sizeof (struct mthca_data_seg)); qp->rq.max_gs = min_t(int, dev->limits.max_sg, (min(dev->limits.max_desc_sz, 1 << qp->rq.wqe_shift) - sizeof (struct mthca_next_seg)) / sizeof (struct mthca_data_seg)); } /* * Allocate and register buffer for WQEs. qp->rq.max, sq.max, * rq.max_gs and sq.max_gs must all be assigned. * mthca_alloc_wqe_buf will calculate rq.wqe_shift and * sq.wqe_shift (as well as send_wqe_offset, is_direct, and * queue) */ static int mthca_alloc_wqe_buf(struct mthca_dev *dev, struct mthca_pd *pd, struct mthca_qp *qp) { int size; int err = -ENOMEM; size = sizeof (struct mthca_next_seg) + qp->rq.max_gs * sizeof (struct mthca_data_seg); if (size > dev->limits.max_desc_sz) return -EINVAL; for (qp->rq.wqe_shift = 6; 1 << qp->rq.wqe_shift < size; qp->rq.wqe_shift++) ; /* nothing */ size = qp->sq.max_gs * sizeof (struct mthca_data_seg); switch (qp->transport) { case MLX: size += 2 * sizeof (struct mthca_data_seg); break; case UD: size += mthca_is_memfree(dev) ? sizeof (struct mthca_arbel_ud_seg) : sizeof (struct mthca_tavor_ud_seg); break; case UC: size += sizeof (struct mthca_raddr_seg); break; case RC: size += sizeof (struct mthca_raddr_seg); /* * An atomic op will require an atomic segment, a * remote address segment and one scatter entry. */ size = max_t(int, size, sizeof (struct mthca_atomic_seg) + sizeof (struct mthca_raddr_seg) + sizeof (struct mthca_data_seg)); break; default: break; } /* Make sure that we have enough space for a bind request */ size = max_t(int, size, sizeof (struct mthca_bind_seg)); size += sizeof (struct mthca_next_seg); if (size > dev->limits.max_desc_sz) return -EINVAL; for (qp->sq.wqe_shift = 6; 1 << qp->sq.wqe_shift < size; qp->sq.wqe_shift++) ; /* nothing */ qp->send_wqe_offset = ALIGN(qp->rq.max << qp->rq.wqe_shift, 1 << qp->sq.wqe_shift); /* * If this is a userspace QP, we don't actually have to * allocate anything. All we need is to calculate the WQE * sizes and the send_wqe_offset, so we're done now. */ if (pd->ibpd.uobject) return 0; size = PAGE_ALIGN(qp->send_wqe_offset + (qp->sq.max << qp->sq.wqe_shift)); qp->wrid = kmalloc((qp->rq.max + qp->sq.max) * sizeof (u64), GFP_KERNEL); if (!qp->wrid) goto err_out; err = mthca_buf_alloc(dev, size, MTHCA_MAX_DIRECT_QP_SIZE, &qp->queue, &qp->is_direct, pd, 0, &qp->mr); if (err) goto err_out; return 0; err_out: kfree(qp->wrid); return err; } static void mthca_free_wqe_buf(struct mthca_dev *dev, struct mthca_qp *qp) { mthca_buf_free(dev, PAGE_ALIGN(qp->send_wqe_offset + (qp->sq.max << qp->sq.wqe_shift)), &qp->queue, qp->is_direct, &qp->mr); kfree(qp->wrid); } static int mthca_map_memfree(struct mthca_dev *dev, struct mthca_qp *qp) { int ret; if (mthca_is_memfree(dev)) { ret = mthca_table_get(dev, dev->qp_table.qp_table, qp->qpn); if (ret) return ret; ret = mthca_table_get(dev, dev->qp_table.eqp_table, qp->qpn); if (ret) goto err_qpc; ret = mthca_table_get(dev, dev->qp_table.rdb_table, qp->qpn << dev->qp_table.rdb_shift); if (ret) goto err_eqpc; } return 0; err_eqpc: mthca_table_put(dev, dev->qp_table.eqp_table, qp->qpn); err_qpc: mthca_table_put(dev, dev->qp_table.qp_table, qp->qpn); return ret; } static void mthca_unmap_memfree(struct mthca_dev *dev, struct mthca_qp *qp) { mthca_table_put(dev, dev->qp_table.rdb_table, qp->qpn << dev->qp_table.rdb_shift); mthca_table_put(dev, dev->qp_table.eqp_table, qp->qpn); mthca_table_put(dev, dev->qp_table.qp_table, qp->qpn); } static int mthca_alloc_memfree(struct mthca_dev *dev, struct mthca_qp *qp) { if (mthca_is_memfree(dev)) { qp->rq.db_index = mthca_alloc_db(dev, MTHCA_DB_TYPE_RQ, qp->qpn, &qp->rq.db); if (qp->rq.db_index < 0) return -ENOMEM; qp->sq.db_index = mthca_alloc_db(dev, MTHCA_DB_TYPE_SQ, qp->qpn, &qp->sq.db); if (qp->sq.db_index < 0) { mthca_free_db(dev, MTHCA_DB_TYPE_RQ, qp->rq.db_index); return -ENOMEM; } } return 0; } static void mthca_free_memfree(struct mthca_dev *dev, struct mthca_qp *qp) { if (mthca_is_memfree(dev)) { mthca_free_db(dev, MTHCA_DB_TYPE_SQ, qp->sq.db_index); mthca_free_db(dev, MTHCA_DB_TYPE_RQ, qp->rq.db_index); } } static int mthca_alloc_qp_common(struct mthca_dev *dev, struct mthca_pd *pd, struct mthca_cq *send_cq, struct mthca_cq *recv_cq, enum ib_sig_type send_policy, struct mthca_qp *qp) { int ret; int i; qp->refcount = 1; init_waitqueue_head(&qp->wait); mutex_init(&qp->mutex); qp->state = IB_QPS_RESET; qp->atomic_rd_en = 0; qp->resp_depth = 0; qp->sq_policy = send_policy; mthca_wq_reset(&qp->sq); mthca_wq_reset(&qp->rq); spin_lock_init(&qp->sq.lock); spin_lock_init(&qp->rq.lock); ret = mthca_map_memfree(dev, qp); if (ret) return ret; ret = mthca_alloc_wqe_buf(dev, pd, qp); if (ret) { mthca_unmap_memfree(dev, qp); return ret; } mthca_adjust_qp_caps(dev, pd, qp); /* * If this is a userspace QP, we're done now. The doorbells * will be allocated and buffers will be initialized in * userspace. */ if (pd->ibpd.uobject) return 0; ret = mthca_alloc_memfree(dev, qp); if (ret) { mthca_free_wqe_buf(dev, qp); mthca_unmap_memfree(dev, qp); return ret; } if (mthca_is_memfree(dev)) { struct mthca_next_seg *next; struct mthca_data_seg *scatter; int size = (sizeof (struct mthca_next_seg) + qp->rq.max_gs * sizeof (struct mthca_data_seg)) / 16; for (i = 0; i < qp->rq.max; ++i) { next = get_recv_wqe(qp, i); next->nda_op = cpu_to_be32(((i + 1) & (qp->rq.max - 1)) << qp->rq.wqe_shift); next->ee_nds = cpu_to_be32(size); for (scatter = (void *) (next + 1); (void *) scatter < (void *) next + (1 << qp->rq.wqe_shift); ++scatter) scatter->lkey = cpu_to_be32(MTHCA_INVAL_LKEY); } for (i = 0; i < qp->sq.max; ++i) { next = get_send_wqe(qp, i); next->nda_op = cpu_to_be32((((i + 1) & (qp->sq.max - 1)) << qp->sq.wqe_shift) + qp->send_wqe_offset); } } qp->sq.last = get_send_wqe(qp, qp->sq.max - 1); qp->rq.last = get_recv_wqe(qp, qp->rq.max - 1); return 0; } static int mthca_set_qp_size(struct mthca_dev *dev, struct ib_qp_cap *cap, struct mthca_pd *pd, struct mthca_qp *qp) { int max_data_size = mthca_max_data_size(dev, qp, dev->limits.max_desc_sz); /* Sanity check QP size before proceeding */ if (cap->max_send_wr > dev->limits.max_wqes || cap->max_recv_wr > dev->limits.max_wqes || cap->max_send_sge > dev->limits.max_sg || cap->max_recv_sge > dev->limits.max_sg || cap->max_inline_data > mthca_max_inline_data(pd, max_data_size)) return -EINVAL; /* * For MLX transport we need 2 extra S/G entries: * one for the header and one for the checksum at the end */ if (qp->transport == MLX && cap->max_recv_sge + 2 > dev->limits.max_sg) return -EINVAL; if (mthca_is_memfree(dev)) { qp->rq.max = cap->max_recv_wr ? roundup_pow_of_two(cap->max_recv_wr) : 0; qp->sq.max = cap->max_send_wr ? roundup_pow_of_two(cap->max_send_wr) : 0; } else { qp->rq.max = cap->max_recv_wr; qp->sq.max = cap->max_send_wr; } qp->rq.max_gs = cap->max_recv_sge; qp->sq.max_gs = max_t(int, cap->max_send_sge, ALIGN(cap->max_inline_data + MTHCA_INLINE_HEADER_SIZE, MTHCA_INLINE_CHUNK_SIZE) / sizeof (struct mthca_data_seg)); return 0; } int mthca_alloc_qp(struct mthca_dev *dev, struct mthca_pd *pd, struct mthca_cq *send_cq, struct mthca_cq *recv_cq, enum ib_qp_type type, enum ib_sig_type send_policy, struct ib_qp_cap *cap, struct mthca_qp *qp) { int err; switch (type) { case IB_QPT_RC: qp->transport = RC; break; case IB_QPT_UC: qp->transport = UC; break; case IB_QPT_UD: qp->transport = UD; break; default: return -EINVAL; } err = mthca_set_qp_size(dev, cap, pd, qp); if (err) return err; qp->qpn = mthca_alloc(&dev->qp_table.alloc); if (qp->qpn == -1) return -ENOMEM; /* initialize port to zero for error-catching. */ qp->port = 0; err = mthca_alloc_qp_common(dev, pd, send_cq, recv_cq, send_policy, qp); if (err) { mthca_free(&dev->qp_table.alloc, qp->qpn); return err; } spin_lock_irq(&dev->qp_table.lock); mthca_array_set(&dev->qp_table.qp, qp->qpn & (dev->limits.num_qps - 1), qp); spin_unlock_irq(&dev->qp_table.lock); return 0; } static void mthca_lock_cqs(struct mthca_cq *send_cq, struct mthca_cq *recv_cq) { if (send_cq == recv_cq) spin_lock_irq(&send_cq->lock); else if (send_cq->cqn < recv_cq->cqn) { spin_lock_irq(&send_cq->lock); spin_lock_nested(&recv_cq->lock, SINGLE_DEPTH_NESTING); } else { spin_lock_irq(&recv_cq->lock); spin_lock_nested(&send_cq->lock, SINGLE_DEPTH_NESTING); } } static void mthca_unlock_cqs(struct mthca_cq *send_cq, struct mthca_cq *recv_cq) { if (send_cq == recv_cq) spin_unlock_irq(&send_cq->lock); else if (send_cq->cqn < recv_cq->cqn) { spin_unlock(&recv_cq->lock); spin_unlock_irq(&send_cq->lock); } else { spin_unlock(&send_cq->lock); spin_unlock_irq(&recv_cq->lock); } } int mthca_alloc_sqp(struct mthca_dev *dev, struct mthca_pd *pd, struct mthca_cq *send_cq, struct mthca_cq *recv_cq, enum ib_sig_type send_policy, struct ib_qp_cap *cap, int qpn, int port, struct mthca_sqp *sqp) { u32 mqpn = qpn * 2 + dev->qp_table.sqp_start + port - 1; int err; sqp->qp.transport = MLX; err = mthca_set_qp_size(dev, cap, pd, &sqp->qp); if (err) return err; sqp->header_buf_size = sqp->qp.sq.max * MTHCA_UD_HEADER_SIZE; sqp->header_buf = dma_alloc_coherent(&dev->pdev->dev, sqp->header_buf_size, &sqp->header_dma, GFP_KERNEL); if (!sqp->header_buf) return -ENOMEM; spin_lock_irq(&dev->qp_table.lock); if (mthca_array_get(&dev->qp_table.qp, mqpn)) err = -EBUSY; else mthca_array_set(&dev->qp_table.qp, mqpn, sqp); spin_unlock_irq(&dev->qp_table.lock); if (err) goto err_out; sqp->qp.port = port; sqp->qp.qpn = mqpn; sqp->qp.transport = MLX; err = mthca_alloc_qp_common(dev, pd, send_cq, recv_cq, send_policy, &sqp->qp); if (err) goto err_out_free; atomic_inc(&pd->sqp_count); return 0; err_out_free: /* * Lock CQs here, so that CQ polling code can do QP lookup * without taking a lock. */ mthca_lock_cqs(send_cq, recv_cq); spin_lock(&dev->qp_table.lock); mthca_array_clear(&dev->qp_table.qp, mqpn); spin_unlock(&dev->qp_table.lock); mthca_unlock_cqs(send_cq, recv_cq); err_out: dma_free_coherent(&dev->pdev->dev, sqp->header_buf_size, sqp->header_buf, sqp->header_dma); return err; } static inline int get_qp_refcount(struct mthca_dev *dev, struct mthca_qp *qp) { int c; spin_lock_irq(&dev->qp_table.lock); c = qp->refcount; spin_unlock_irq(&dev->qp_table.lock); return c; } void mthca_free_qp(struct mthca_dev *dev, struct mthca_qp *qp) { u8 status; struct mthca_cq *send_cq; struct mthca_cq *recv_cq; send_cq = to_mcq(qp->ibqp.send_cq); recv_cq = to_mcq(qp->ibqp.recv_cq); /* * Lock CQs here, so that CQ polling code can do QP lookup * without taking a lock. */ mthca_lock_cqs(send_cq, recv_cq); spin_lock(&dev->qp_table.lock); mthca_array_clear(&dev->qp_table.qp, qp->qpn & (dev->limits.num_qps - 1)); --qp->refcount; spin_unlock(&dev->qp_table.lock); mthca_unlock_cqs(send_cq, recv_cq); wait_event(qp->wait, !get_qp_refcount(dev, qp)); if (qp->state != IB_QPS_RESET) mthca_MODIFY_QP(dev, qp->state, IB_QPS_RESET, qp->qpn, 0, NULL, 0, &status); /* * If this is a userspace QP, the buffers, MR, CQs and so on * will be cleaned up in userspace, so all we have to do is * unref the mem-free tables and free the QPN in our table. */ if (!qp->ibqp.uobject) { mthca_cq_clean(dev, recv_cq, qp->qpn, qp->ibqp.srq ? to_msrq(qp->ibqp.srq) : NULL); if (send_cq != recv_cq) mthca_cq_clean(dev, send_cq, qp->qpn, NULL); mthca_free_memfree(dev, qp); mthca_free_wqe_buf(dev, qp); } mthca_unmap_memfree(dev, qp); if (is_sqp(dev, qp)) { atomic_dec(&(to_mpd(qp->ibqp.pd)->sqp_count)); dma_free_coherent(&dev->pdev->dev, to_msqp(qp)->header_buf_size, to_msqp(qp)->header_buf, to_msqp(qp)->header_dma); } else mthca_free(&dev->qp_table.alloc, qp->qpn); } /* Create UD header for an MLX send and build a data segment for it */ static int build_mlx_header(struct mthca_dev *dev, struct mthca_sqp *sqp, int ind, struct ib_send_wr *wr, struct mthca_mlx_seg *mlx, struct mthca_data_seg *data) { int header_size; int err; u16 pkey; ib_ud_header_init(256, /* assume a MAD */ mthca_ah_grh_present(to_mah(wr->wr.ud.ah)), &sqp->ud_header); err = mthca_read_ah(dev, to_mah(wr->wr.ud.ah), &sqp->ud_header); if (err) return err; mlx->flags &= ~cpu_to_be32(MTHCA_NEXT_SOLICIT | 1); mlx->flags |= cpu_to_be32((!sqp->qp.ibqp.qp_num ? MTHCA_MLX_VL15 : 0) | (sqp->ud_header.lrh.destination_lid == IB_LID_PERMISSIVE ? MTHCA_MLX_SLR : 0) | (sqp->ud_header.lrh.service_level << 8)); mlx->rlid = sqp->ud_header.lrh.destination_lid; mlx->vcrc = 0; switch (wr->opcode) { case IB_WR_SEND: sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY; sqp->ud_header.immediate_present = 0; break; case IB_WR_SEND_WITH_IMM: sqp->ud_header.bth.opcode = IB_OPCODE_UD_SEND_ONLY_WITH_IMMEDIATE; sqp->ud_header.immediate_present = 1; sqp->ud_header.immediate_data = wr->imm_data; break; default: return -EINVAL; } sqp->ud_header.lrh.virtual_lane = !sqp->qp.ibqp.qp_num ? 15 : 0; if (sqp->ud_header.lrh.destination_lid == IB_LID_PERMISSIVE) sqp->ud_header.lrh.source_lid = IB_LID_PERMISSIVE; sqp->ud_header.bth.solicited_event = !!(wr->send_flags & IB_SEND_SOLICITED); if (!sqp->qp.ibqp.qp_num) ib_get_cached_pkey(&dev->ib_dev, sqp->qp.port, sqp->pkey_index, &pkey); else ib_get_cached_pkey(&dev->ib_dev, sqp->qp.port, wr->wr.ud.pkey_index, &pkey); sqp->ud_header.bth.pkey = cpu_to_be16(pkey); sqp->ud_header.bth.destination_qpn = cpu_to_be32(wr->wr.ud.remote_qpn); sqp->ud_header.bth.psn = cpu_to_be32((sqp->send_psn++) & ((1 << 24) - 1)); sqp->ud_header.deth.qkey = cpu_to_be32(wr->wr.ud.remote_qkey & 0x80000000 ? sqp->qkey : wr->wr.ud.remote_qkey); sqp->ud_header.deth.source_qpn = cpu_to_be32(sqp->qp.ibqp.qp_num); header_size = ib_ud_header_pack(&sqp->ud_header, sqp->header_buf + ind * MTHCA_UD_HEADER_SIZE); data->byte_count = cpu_to_be32(header_size); data->lkey = cpu_to_be32(to_mpd(sqp->qp.ibqp.pd)->ntmr.ibmr.lkey); data->addr = cpu_to_be64(sqp->header_dma + ind * MTHCA_UD_HEADER_SIZE); return 0; } static inline int mthca_wq_overflow(struct mthca_wq *wq, int nreq, struct ib_cq *ib_cq) { unsigned cur; struct mthca_cq *cq; cur = wq->head - wq->tail; if (likely(cur + nreq < wq->max)) return 0; cq = to_mcq(ib_cq); spin_lock(&cq->lock); cur = wq->head - wq->tail; spin_unlock(&cq->lock); return cur + nreq >= wq->max; } int mthca_tavor_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr, struct ib_send_wr **bad_wr) { struct mthca_dev *dev = to_mdev(ibqp->device); struct mthca_qp *qp = to_mqp(ibqp); void *wqe; void *prev_wqe; unsigned long flags; int err = 0; int nreq; int i; int size; int size0 = 0; /* * f0 is only used if nreq != 0, and f0 will be initialized * the first time through the main loop, since size0 == 0 the * first time through. So nreq cannot become non-zero without * initializing f0, and f0 is in fact never used uninitialized. */ u32 uninitialized_var(f0); int ind; u8 op0 = 0; spin_lock_irqsave(&qp->sq.lock, flags); /* XXX check that state is OK to post send */ ind = qp->sq.next_ind; for (nreq = 0; wr; ++nreq, wr = wr->next) { if (mthca_wq_overflow(&qp->sq, nreq, qp->ibqp.send_cq)) { mthca_err(dev, "SQ %06x full (%u head, %u tail," " %d max, %d nreq)\n", qp->qpn, qp->sq.head, qp->sq.tail, qp->sq.max, nreq); err = -ENOMEM; *bad_wr = wr; goto out; } wqe = get_send_wqe(qp, ind); prev_wqe = qp->sq.last; qp->sq.last = wqe; ((struct mthca_next_seg *) wqe)->nda_op = 0; ((struct mthca_next_seg *) wqe)->ee_nds = 0; ((struct mthca_next_seg *) wqe)->flags = ((wr->send_flags & IB_SEND_SIGNALED) ? cpu_to_be32(MTHCA_NEXT_CQ_UPDATE) : 0) | ((wr->send_flags & IB_SEND_SOLICITED) ? cpu_to_be32(MTHCA_NEXT_SOLICIT) : 0) | cpu_to_be32(1); if (wr->opcode == IB_WR_SEND_WITH_IMM || wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) ((struct mthca_next_seg *) wqe)->imm = wr->imm_data; wqe += sizeof (struct mthca_next_seg); size = sizeof (struct mthca_next_seg) / 16; switch (qp->transport) { case RC: switch (wr->opcode) { case IB_WR_ATOMIC_CMP_AND_SWP: case IB_WR_ATOMIC_FETCH_AND_ADD: ((struct mthca_raddr_seg *) wqe)->raddr = cpu_to_be64(wr->wr.atomic.remote_addr); ((struct mthca_raddr_seg *) wqe)->rkey = cpu_to_be32(wr->wr.atomic.rkey); ((struct mthca_raddr_seg *) wqe)->reserved = 0; wqe += sizeof (struct mthca_raddr_seg); if (wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP) { ((struct mthca_atomic_seg *) wqe)->swap_add = cpu_to_be64(wr->wr.atomic.swap); ((struct mthca_atomic_seg *) wqe)->compare = cpu_to_be64(wr->wr.atomic.compare_add); } else { ((struct mthca_atomic_seg *) wqe)->swap_add = cpu_to_be64(wr->wr.atomic.compare_add); ((struct mthca_atomic_seg *) wqe)->compare = 0; } wqe += sizeof (struct mthca_atomic_seg); size += (sizeof (struct mthca_raddr_seg) + sizeof (struct mthca_atomic_seg)) / 16; break; case IB_WR_RDMA_WRITE: case IB_WR_RDMA_WRITE_WITH_IMM: case IB_WR_RDMA_READ: ((struct mthca_raddr_seg *) wqe)->raddr = cpu_to_be64(wr->wr.rdma.remote_addr); ((struct mthca_raddr_seg *) wqe)->rkey = cpu_to_be32(wr->wr.rdma.rkey); ((struct mthca_raddr_seg *) wqe)->reserved = 0; wqe += sizeof (struct mthca_raddr_seg); size += sizeof (struct mthca_raddr_seg) / 16; break; default: /* No extra segments required for sends */ break; } break; case UC: switch (wr->opcode) { case IB_WR_RDMA_WRITE: case IB_WR_RDMA_WRITE_WITH_IMM: ((struct mthca_raddr_seg *) wqe)->raddr = cpu_to_be64(wr->wr.rdma.remote_addr); ((struct mthca_raddr_seg *) wqe)->rkey = cpu_to_be32(wr->wr.rdma.rkey); ((struct mthca_raddr_seg *) wqe)->reserved = 0; wqe += sizeof (struct mthca_raddr_seg); size += sizeof (struct mthca_raddr_seg) / 16; break; default: /* No extra segments required for sends */ break; } break; case UD: ((struct mthca_tavor_ud_seg *) wqe)->lkey = cpu_to_be32(to_mah(wr->wr.ud.ah)->key); ((struct mthca_tavor_ud_seg *) wqe)->av_addr = cpu_to_be64(to_mah(wr->wr.ud.ah)->avdma); ((struct mthca_tavor_ud_seg *) wqe)->dqpn = cpu_to_be32(wr->wr.ud.remote_qpn); ((struct mthca_tavor_ud_seg *) wqe)->qkey = cpu_to_be32(wr->wr.ud.remote_qkey); wqe += sizeof (struct mthca_tavor_ud_seg); size += sizeof (struct mthca_tavor_ud_seg) / 16; break; case MLX: err = build_mlx_header(dev, to_msqp(qp), ind, wr, wqe - sizeof (struct mthca_next_seg), wqe); if (err) { *bad_wr = wr; goto out; } wqe += sizeof (struct mthca_data_seg); size += sizeof (struct mthca_data_seg) / 16; break; } if (wr->num_sge > qp->sq.max_gs) { mthca_err(dev, "too many gathers\n"); err = -EINVAL; *bad_wr = wr; goto out; } for (i = 0; i < wr->num_sge; ++i) { mthca_set_data_seg(wqe, wr->sg_list + i); wqe += sizeof (struct mthca_data_seg); size += sizeof (struct mthca_data_seg) / 16; } /* Add one more inline data segment for ICRC */ if (qp->transport == MLX) { ((struct mthca_data_seg *) wqe)->byte_count = cpu_to_be32((1 << 31) | 4); ((u32 *) wqe)[1] = 0; wqe += sizeof (struct mthca_data_seg); size += sizeof (struct mthca_data_seg) / 16; } qp->wrid[ind + qp->rq.max] = wr->wr_id; if (wr->opcode >= ARRAY_SIZE(mthca_opcode)) { mthca_err(dev, "opcode invalid\n"); err = -EINVAL; *bad_wr = wr; goto out; } ((struct mthca_next_seg *) prev_wqe)->nda_op = cpu_to_be32(((ind << qp->sq.wqe_shift) + qp->send_wqe_offset) | mthca_opcode[wr->opcode]); wmb(); ((struct mthca_next_seg *) prev_wqe)->ee_nds = cpu_to_be32((size0 ? 0 : MTHCA_NEXT_DBD) | size | ((wr->send_flags & IB_SEND_FENCE) ? MTHCA_NEXT_FENCE : 0)); if (!size0) { size0 = size; op0 = mthca_opcode[wr->opcode]; f0 = wr->send_flags & IB_SEND_FENCE ? MTHCA_SEND_DOORBELL_FENCE : 0; } ++ind; if (unlikely(ind >= qp->sq.max)) ind -= qp->sq.max; } out: if (likely(nreq)) { __be32 doorbell[2]; doorbell[0] = cpu_to_be32(((qp->sq.next_ind << qp->sq.wqe_shift) + qp->send_wqe_offset) | f0 | op0); doorbell[1] = cpu_to_be32((qp->qpn << 8) | size0); wmb(); mthca_write64(doorbell, dev->kar + MTHCA_SEND_DOORBELL, MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock)); /* * Make sure doorbells don't leak out of SQ spinlock * and reach the HCA out of order: */ mmiowb(); } qp->sq.next_ind = ind; qp->sq.head += nreq; spin_unlock_irqrestore(&qp->sq.lock, flags); return err; } int mthca_tavor_post_receive(struct ib_qp *ibqp, struct ib_recv_wr *wr, struct ib_recv_wr **bad_wr) { struct mthca_dev *dev = to_mdev(ibqp->device); struct mthca_qp *qp = to_mqp(ibqp); __be32 doorbell[2]; unsigned long flags; int err = 0; int nreq; int i; int size; int size0 = 0; int ind; void *wqe; void *prev_wqe; spin_lock_irqsave(&qp->rq.lock, flags); /* XXX check that state is OK to post receive */ ind = qp->rq.next_ind; for (nreq = 0; wr; wr = wr->next) { if (mthca_wq_overflow(&qp->rq, nreq, qp->ibqp.recv_cq)) { mthca_err(dev, "RQ %06x full (%u head, %u tail," " %d max, %d nreq)\n", qp->qpn, qp->rq.head, qp->rq.tail, qp->rq.max, nreq); err = -ENOMEM; *bad_wr = wr; goto out; } wqe = get_recv_wqe(qp, ind); prev_wqe = qp->rq.last; qp->rq.last = wqe; ((struct mthca_next_seg *) wqe)->nda_op = 0; ((struct mthca_next_seg *) wqe)->ee_nds = cpu_to_be32(MTHCA_NEXT_DBD); ((struct mthca_next_seg *) wqe)->flags = 0; wqe += sizeof (struct mthca_next_seg); size = sizeof (struct mthca_next_seg) / 16; if (unlikely(wr->num_sge > qp->rq.max_gs)) { err = -EINVAL; *bad_wr = wr; goto out; } for (i = 0; i < wr->num_sge; ++i) { mthca_set_data_seg(wqe, wr->sg_list + i); wqe += sizeof (struct mthca_data_seg); size += sizeof (struct mthca_data_seg) / 16; } qp->wrid[ind] = wr->wr_id; ((struct mthca_next_seg *) prev_wqe)->nda_op = cpu_to_be32((ind << qp->rq.wqe_shift) | 1); wmb(); ((struct mthca_next_seg *) prev_wqe)->ee_nds = cpu_to_be32(MTHCA_NEXT_DBD | size); if (!size0) size0 = size; ++ind; if (unlikely(ind >= qp->rq.max)) ind -= qp->rq.max; ++nreq; if (unlikely(nreq == MTHCA_TAVOR_MAX_WQES_PER_RECV_DB)) { nreq = 0; doorbell[0] = cpu_to_be32((qp->rq.next_ind << qp->rq.wqe_shift) | size0); doorbell[1] = cpu_to_be32(qp->qpn << 8); wmb(); mthca_write64(doorbell, dev->kar + MTHCA_RECEIVE_DOORBELL, MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock)); qp->rq.next_ind = ind; qp->rq.head += MTHCA_TAVOR_MAX_WQES_PER_RECV_DB; size0 = 0; } } out: if (likely(nreq)) { doorbell[0] = cpu_to_be32((qp->rq.next_ind << qp->rq.wqe_shift) | size0); doorbell[1] = cpu_to_be32((qp->qpn << 8) | nreq); wmb(); mthca_write64(doorbell, dev->kar + MTHCA_RECEIVE_DOORBELL, MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock)); } qp->rq.next_ind = ind; qp->rq.head += nreq; /* * Make sure doorbells don't leak out of RQ spinlock and reach * the HCA out of order: */ mmiowb(); spin_unlock_irqrestore(&qp->rq.lock, flags); return err; } int mthca_arbel_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr, struct ib_send_wr **bad_wr) { struct mthca_dev *dev = to_mdev(ibqp->device); struct mthca_qp *qp = to_mqp(ibqp); __be32 doorbell[2]; void *wqe; void *prev_wqe; unsigned long flags; int err = 0; int nreq; int i; int size; int size0 = 0; /* * f0 is only used if nreq != 0, and f0 will be initialized * the first time through the main loop, since size0 == 0 the * first time through. So nreq cannot become non-zero without * initializing f0, and f0 is in fact never used uninitialized. */ u32 uninitialized_var(f0); int ind; u8 op0 = 0; spin_lock_irqsave(&qp->sq.lock, flags); /* XXX check that state is OK to post send */ ind = qp->sq.head & (qp->sq.max - 1); for (nreq = 0; wr; ++nreq, wr = wr->next) { if (unlikely(nreq == MTHCA_ARBEL_MAX_WQES_PER_SEND_DB)) { nreq = 0; doorbell[0] = cpu_to_be32((MTHCA_ARBEL_MAX_WQES_PER_SEND_DB << 24) | ((qp->sq.head & 0xffff) << 8) | f0 | op0); doorbell[1] = cpu_to_be32((qp->qpn << 8) | size0); qp->sq.head += MTHCA_ARBEL_MAX_WQES_PER_SEND_DB; size0 = 0; /* * Make sure that descriptors are written before * doorbell record. */ wmb(); *qp->sq.db = cpu_to_be32(qp->sq.head & 0xffff); /* * Make sure doorbell record is written before we * write MMIO send doorbell. */ wmb(); mthca_write64(doorbell, dev->kar + MTHCA_SEND_DOORBELL, MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock)); } if (mthca_wq_overflow(&qp->sq, nreq, qp->ibqp.send_cq)) { mthca_err(dev, "SQ %06x full (%u head, %u tail," " %d max, %d nreq)\n", qp->qpn, qp->sq.head, qp->sq.tail, qp->sq.max, nreq); err = -ENOMEM; *bad_wr = wr; goto out; } wqe = get_send_wqe(qp, ind); prev_wqe = qp->sq.last; qp->sq.last = wqe; ((struct mthca_next_seg *) wqe)->flags = ((wr->send_flags & IB_SEND_SIGNALED) ? cpu_to_be32(MTHCA_NEXT_CQ_UPDATE) : 0) | ((wr->send_flags & IB_SEND_SOLICITED) ? cpu_to_be32(MTHCA_NEXT_SOLICIT) : 0) | cpu_to_be32(1); if (wr->opcode == IB_WR_SEND_WITH_IMM || wr->opcode == IB_WR_RDMA_WRITE_WITH_IMM) ((struct mthca_next_seg *) wqe)->imm = wr->imm_data; wqe += sizeof (struct mthca_next_seg); size = sizeof (struct mthca_next_seg) / 16; switch (qp->transport) { case RC: switch (wr->opcode) { case IB_WR_ATOMIC_CMP_AND_SWP: case IB_WR_ATOMIC_FETCH_AND_ADD: ((struct mthca_raddr_seg *) wqe)->raddr = cpu_to_be64(wr->wr.atomic.remote_addr); ((struct mthca_raddr_seg *) wqe)->rkey = cpu_to_be32(wr->wr.atomic.rkey); ((struct mthca_raddr_seg *) wqe)->reserved = 0; wqe += sizeof (struct mthca_raddr_seg); if (wr->opcode == IB_WR_ATOMIC_CMP_AND_SWP) { ((struct mthca_atomic_seg *) wqe)->swap_add = cpu_to_be64(wr->wr.atomic.swap); ((struct mthca_atomic_seg *) wqe)->compare = cpu_to_be64(wr->wr.atomic.compare_add); } else { ((struct mthca_atomic_seg *) wqe)->swap_add = cpu_to_be64(wr->wr.atomic.compare_add); ((struct mthca_atomic_seg *) wqe)->compare = 0; } wqe += sizeof (struct mthca_atomic_seg); size += (sizeof (struct mthca_raddr_seg) + sizeof (struct mthca_atomic_seg)) / 16; break; case IB_WR_RDMA_READ: case IB_WR_RDMA_WRITE: case IB_WR_RDMA_WRITE_WITH_IMM: ((struct mthca_raddr_seg *) wqe)->raddr = cpu_to_be64(wr->wr.rdma.remote_addr); ((struct mthca_raddr_seg *) wqe)->rkey = cpu_to_be32(wr->wr.rdma.rkey); ((struct mthca_raddr_seg *) wqe)->reserved = 0; wqe += sizeof (struct mthca_raddr_seg); size += sizeof (struct mthca_raddr_seg) / 16; break; default: /* No extra segments required for sends */ break; } break; case UC: switch (wr->opcode) { case IB_WR_RDMA_WRITE: case IB_WR_RDMA_WRITE_WITH_IMM: ((struct mthca_raddr_seg *) wqe)->raddr = cpu_to_be64(wr->wr.rdma.remote_addr); ((struct mthca_raddr_seg *) wqe)->rkey = cpu_to_be32(wr->wr.rdma.rkey); ((struct mthca_raddr_seg *) wqe)->reserved = 0; wqe += sizeof (struct mthca_raddr_seg); size += sizeof (struct mthca_raddr_seg) / 16; break; default: /* No extra segments required for sends */ break; } break; case UD: memcpy(((struct mthca_arbel_ud_seg *) wqe)->av, to_mah(wr->wr.ud.ah)->av, MTHCA_AV_SIZE); ((struct mthca_arbel_ud_seg *) wqe)->dqpn = cpu_to_be32(wr->wr.ud.remote_qpn); ((struct mthca_arbel_ud_seg *) wqe)->qkey = cpu_to_be32(wr->wr.ud.remote_qkey); wqe += sizeof (struct mthca_arbel_ud_seg); size += sizeof (struct mthca_arbel_ud_seg) / 16; break; case MLX: err = build_mlx_header(dev, to_msqp(qp), ind, wr, wqe - sizeof (struct mthca_next_seg), wqe); if (err) { *bad_wr = wr; goto out; } wqe += sizeof (struct mthca_data_seg); size += sizeof (struct mthca_data_seg) / 16; break; } if (wr->num_sge > qp->sq.max_gs) { mthca_err(dev, "too many gathers\n"); err = -EINVAL; *bad_wr = wr; goto out; } for (i = 0; i < wr->num_sge; ++i) { mthca_set_data_seg(wqe, wr->sg_list + i); wqe += sizeof (struct mthca_data_seg); size += sizeof (struct mthca_data_seg) / 16; } /* Add one more inline data segment for ICRC */ if (qp->transport == MLX) { ((struct mthca_data_seg *) wqe)->byte_count = cpu_to_be32((1 << 31) | 4); ((u32 *) wqe)[1] = 0; wqe += sizeof (struct mthca_data_seg); size += sizeof (struct mthca_data_seg) / 16; } qp->wrid[ind + qp->rq.max] = wr->wr_id; if (wr->opcode >= ARRAY_SIZE(mthca_opcode)) { mthca_err(dev, "opcode invalid\n"); err = -EINVAL; *bad_wr = wr; goto out; } ((struct mthca_next_seg *) prev_wqe)->nda_op = cpu_to_be32(((ind << qp->sq.wqe_shift) + qp->send_wqe_offset) | mthca_opcode[wr->opcode]); wmb(); ((struct mthca_next_seg *) prev_wqe)->ee_nds = cpu_to_be32(MTHCA_NEXT_DBD | size | ((wr->send_flags & IB_SEND_FENCE) ? MTHCA_NEXT_FENCE : 0)); if (!size0) { size0 = size; op0 = mthca_opcode[wr->opcode]; f0 = wr->send_flags & IB_SEND_FENCE ? MTHCA_SEND_DOORBELL_FENCE : 0; } ++ind; if (unlikely(ind >= qp->sq.max)) ind -= qp->sq.max; } out: if (likely(nreq)) { doorbell[0] = cpu_to_be32((nreq << 24) | ((qp->sq.head & 0xffff) << 8) | f0 | op0); doorbell[1] = cpu_to_be32((qp->qpn << 8) | size0); qp->sq.head += nreq; /* * Make sure that descriptors are written before * doorbell record. */ wmb(); *qp->sq.db = cpu_to_be32(qp->sq.head & 0xffff); /* * Make sure doorbell record is written before we * write MMIO send doorbell. */ wmb(); mthca_write64(doorbell, dev->kar + MTHCA_SEND_DOORBELL, MTHCA_GET_DOORBELL_LOCK(&dev->doorbell_lock)); } /* * Make sure doorbells don't leak out of SQ spinlock and reach * the HCA out of order: */ mmiowb(); spin_unlock_irqrestore(&qp->sq.lock, flags); return err; } int mthca_arbel_post_receive(struct ib_qp *ibqp, struct ib_recv_wr *wr, struct ib_recv_wr **bad_wr) { struct mthca_dev *dev = to_mdev(ibqp->device); struct mthca_qp *qp = to_mqp(ibqp); unsigned long flags; int err = 0; int nreq; int ind; int i; void *wqe; spin_lock_irqsave(&qp->rq.lock, flags); /* XXX check that state is OK to post receive */ ind = qp->rq.head & (qp->rq.max - 1); for (nreq = 0; wr; ++nreq, wr = wr->next) { if (mthca_wq_overflow(&qp->rq, nreq, qp->ibqp.recv_cq)) { mthca_err(dev, "RQ %06x full (%u head, %u tail," " %d max, %d nreq)\n", qp->qpn, qp->rq.head, qp->rq.tail, qp->rq.max, nreq); err = -ENOMEM; *bad_wr = wr; goto out; } wqe = get_recv_wqe(qp, ind); ((struct mthca_next_seg *) wqe)->flags = 0; wqe += sizeof (struct mthca_next_seg); if (unlikely(wr->num_sge > qp->rq.max_gs)) { err = -EINVAL; *bad_wr = wr; goto out; } for (i = 0; i < wr->num_sge; ++i) { mthca_set_data_seg(wqe, wr->sg_list + i); wqe += sizeof (struct mthca_data_seg); } if (i < qp->rq.max_gs) mthca_set_data_seg_inval(wqe); qp->wrid[ind] = wr->wr_id; ++ind; if (unlikely(ind >= qp->rq.max)) ind -= qp->rq.max; } out: if (likely(nreq)) { qp->rq.head += nreq; /* * Make sure that descriptors are written before * doorbell record. */ wmb(); *qp->rq.db = cpu_to_be32(qp->rq.head & 0xffff); } spin_unlock_irqrestore(&qp->rq.lock, flags); return err; } void mthca_free_err_wqe(struct mthca_dev *dev, struct mthca_qp *qp, int is_send, int index, int *dbd, __be32 *new_wqe) { struct mthca_next_seg *next; /* * For SRQs, all receive WQEs generate a CQE, so we're always * at the end of the doorbell chain. */ if (qp->ibqp.srq && !is_send) { *new_wqe = 0; return; } if (is_send) next = get_send_wqe(qp, index); else next = get_recv_wqe(qp, index); *dbd = !!(next->ee_nds & cpu_to_be32(MTHCA_NEXT_DBD)); if (next->ee_nds & cpu_to_be32(0x3f)) *new_wqe = (next->nda_op & cpu_to_be32(~0x3f)) | (next->ee_nds & cpu_to_be32(0x3f)); else *new_wqe = 0; } int mthca_init_qp_table(struct mthca_dev *dev) { int err; u8 status; int i; spin_lock_init(&dev->qp_table.lock); /* * We reserve 2 extra QPs per port for the special QPs. The * special QP for port 1 has to be even, so round up. */ dev->qp_table.sqp_start = (dev->limits.reserved_qps + 1) & ~1UL; err = mthca_alloc_init(&dev->qp_table.alloc, dev->limits.num_qps, (1 << 24) - 1, dev->qp_table.sqp_start + MTHCA_MAX_PORTS * 2); if (err) return err; err = mthca_array_init(&dev->qp_table.qp, dev->limits.num_qps); if (err) { mthca_alloc_cleanup(&dev->qp_table.alloc); return err; } for (i = 0; i < 2; ++i) { err = mthca_CONF_SPECIAL_QP(dev, i ? IB_QPT_GSI : IB_QPT_SMI, dev->qp_table.sqp_start + i * 2, &status); if (err) goto err_out; if (status) { mthca_warn(dev, "CONF_SPECIAL_QP returned " "status %02x, aborting.\n", status); err = -EINVAL; goto err_out; } } return 0; err_out: for (i = 0; i < 2; ++i) mthca_CONF_SPECIAL_QP(dev, i, 0, &status); mthca_array_cleanup(&dev->qp_table.qp, dev->limits.num_qps); mthca_alloc_cleanup(&dev->qp_table.alloc); return err; } void mthca_cleanup_qp_table(struct mthca_dev *dev) { int i; u8 status; for (i = 0; i < 2; ++i) mthca_CONF_SPECIAL_QP(dev, i, 0, &status); mthca_array_cleanup(&dev->qp_table.qp, dev->limits.num_qps); mthca_alloc_cleanup(&dev->qp_table.alloc); }