From patchwork Thu Apr 21 07:17:43 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Cheng Xu X-Patchwork-Id: 12821194 X-Patchwork-Delegate: jgg@ziepe.ca Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id F1EC7C433F5 for ; Thu, 21 Apr 2022 07:18:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1385661AbiDUHU4 (ORCPT ); Thu, 21 Apr 2022 03:20:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44740 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1385663AbiDUHUz (ORCPT ); Thu, 21 Apr 2022 03:20:55 -0400 Received: from out30-130.freemail.mail.aliyun.com (out30-130.freemail.mail.aliyun.com [115.124.30.130]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D7E1C167F5 for ; Thu, 21 Apr 2022 00:18:03 -0700 (PDT) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R181e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e04394;MF=chengyou@linux.alibaba.com;NM=1;PH=DS;RN=8;SR=0;TI=SMTPD_---0VAdivEm_1650525479; Received: from localhost(mailfrom:chengyou@linux.alibaba.com fp:SMTPD_---0VAdivEm_1650525479) by smtp.aliyun-inc.com(127.0.0.1); Thu, 21 Apr 2022 15:18:00 +0800 From: Cheng Xu To: jgg@ziepe.ca, dledford@redhat.com, leon@kernel.org Cc: linux-rdma@vger.kernel.org, KaiShen@linux.alibaba.com, chengyou@linux.alibaba.com, tonylu@linux.alibaba.com, BMT@zurich.ibm.com Subject: [PATCH for-next v7 08/12] RDMA/erdma: Add verbs implementation Date: Thu, 21 Apr 2022 15:17:43 +0800 Message-Id: <20220421071747.1892-9-chengyou@linux.alibaba.com> X-Mailer: git-send-email 2.32.0 (Apple Git-132) In-Reply-To: <20220421071747.1892-1-chengyou@linux.alibaba.com> References: <20220421071747.1892-1-chengyou@linux.alibaba.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org The RDMA verbs implementation of erdma is divided into three files: erdma_qp.c, erdma_cq.c, and erdma_verbs.c. Internal used functions and datapath functions of QP/CQ are put in erdma_qp.c and erdma_cq.c, the rest is in erdma_verbs.c. Signed-off-by: Cheng Xu --- drivers/infiniband/hw/erdma/erdma_cq.c | 205 +++ drivers/infiniband/hw/erdma/erdma_qp.c | 564 ++++++++ drivers/infiniband/hw/erdma/erdma_verbs.c | 1461 +++++++++++++++++++++ 3 files changed, 2230 insertions(+) create mode 100644 drivers/infiniband/hw/erdma/erdma_cq.c create mode 100644 drivers/infiniband/hw/erdma/erdma_qp.c create mode 100644 drivers/infiniband/hw/erdma/erdma_verbs.c diff --git a/drivers/infiniband/hw/erdma/erdma_cq.c b/drivers/infiniband/hw/erdma/erdma_cq.c new file mode 100644 index 000000000000..d7cf42b5271c --- /dev/null +++ b/drivers/infiniband/hw/erdma/erdma_cq.c @@ -0,0 +1,205 @@ +// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB + +/* Authors: Cheng Xu */ +/* Kai Shen */ +/* Copyright (c) 2020-2022, Alibaba Group. */ + +#include + +#include "erdma_hw.h" +#include "erdma_verbs.h" + +static void *get_next_valid_cqe(struct erdma_cq *cq) +{ + __be32 *cqe = get_queue_entry(cq->kern_cq.qbuf, cq->kern_cq.ci, + cq->depth, CQE_SHIFT); + u32 owner = FIELD_GET(ERDMA_CQE_HDR_OWNER_MASK, + __be32_to_cpu(READ_ONCE(*cqe))); + + return owner ^ !!(cq->kern_cq.ci & cq->depth) ? cqe : NULL; +} + +static void notify_cq(struct erdma_cq *cq, u8 solcitied) +{ + u64 db_data = + FIELD_PREP(ERDMA_CQDB_IDX_MASK, (cq->kern_cq.notify_cnt)) | + FIELD_PREP(ERDMA_CQDB_CQN_MASK, cq->cqn) | + FIELD_PREP(ERDMA_CQDB_ARM_MASK, 1) | + FIELD_PREP(ERDMA_CQDB_SOL_MASK, solcitied) | + FIELD_PREP(ERDMA_CQDB_CMDSN_MASK, cq->kern_cq.cmdsn) | + FIELD_PREP(ERDMA_CQDB_CI_MASK, cq->kern_cq.ci); + + *cq->kern_cq.db_record = db_data; + writeq(db_data, cq->kern_cq.db); +} + +int erdma_req_notify_cq(struct ib_cq *ibcq, enum ib_cq_notify_flags flags) +{ + struct erdma_cq *cq = to_ecq(ibcq); + unsigned long irq_flags; + int ret = 0; + + spin_lock_irqsave(&cq->kern_cq.lock, irq_flags); + + notify_cq(cq, (flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED); + + if ((flags & IB_CQ_REPORT_MISSED_EVENTS) && get_next_valid_cqe(cq)) + ret = 1; + + cq->kern_cq.notify_cnt++; + + spin_unlock_irqrestore(&cq->kern_cq.lock, irq_flags); + + return ret; +} + +static const enum ib_wc_opcode wc_mapping_table[ERDMA_NUM_OPCODES] = { + [ERDMA_OP_WRITE] = IB_WC_RDMA_WRITE, + [ERDMA_OP_READ] = IB_WC_RDMA_READ, + [ERDMA_OP_SEND] = IB_WC_SEND, + [ERDMA_OP_SEND_WITH_IMM] = IB_WC_SEND, + [ERDMA_OP_RECEIVE] = IB_WC_RECV, + [ERDMA_OP_RECV_IMM] = IB_WC_RECV_RDMA_WITH_IMM, + [ERDMA_OP_RECV_INV] = IB_WC_RECV, + [ERDMA_OP_WRITE_WITH_IMM] = IB_WC_RDMA_WRITE, + [ERDMA_OP_INVALIDATE] = IB_WC_LOCAL_INV, + [ERDMA_OP_RSP_SEND_IMM] = IB_WC_RECV, + [ERDMA_OP_SEND_WITH_INV] = IB_WC_SEND, + [ERDMA_OP_REG_MR] = IB_WC_REG_MR, + [ERDMA_OP_LOCAL_INV] = IB_WC_LOCAL_INV, + [ERDMA_OP_READ_WITH_INV] = IB_WC_RDMA_READ, +}; + +static const struct { + enum erdma_wc_status erdma; + enum ib_wc_status base; + enum erdma_vendor_err vendor; +} map_cqe_status[ERDMA_NUM_WC_STATUS] = { + { ERDMA_WC_SUCCESS, IB_WC_SUCCESS, ERDMA_WC_VENDOR_NO_ERR }, + { ERDMA_WC_GENERAL_ERR, IB_WC_GENERAL_ERR, ERDMA_WC_VENDOR_NO_ERR }, + { ERDMA_WC_RECV_WQE_FORMAT_ERR, IB_WC_GENERAL_ERR, + ERDMA_WC_VENDOR_INVALID_RQE }, + { ERDMA_WC_RECV_STAG_INVALID_ERR, IB_WC_REM_ACCESS_ERR, + ERDMA_WC_VENDOR_RQE_INVALID_STAG }, + { ERDMA_WC_RECV_ADDR_VIOLATION_ERR, IB_WC_REM_ACCESS_ERR, + ERDMA_WC_VENDOR_RQE_ADDR_VIOLATION }, + { ERDMA_WC_RECV_RIGHT_VIOLATION_ERR, IB_WC_REM_ACCESS_ERR, + ERDMA_WC_VENDOR_RQE_ACCESS_RIGHT_ERR }, + { ERDMA_WC_RECV_PDID_ERR, IB_WC_REM_ACCESS_ERR, + ERDMA_WC_VENDOR_RQE_INVALID_PD }, + { ERDMA_WC_RECV_WARRPING_ERR, IB_WC_REM_ACCESS_ERR, + ERDMA_WC_VENDOR_RQE_WRAP_ERR }, + { ERDMA_WC_SEND_WQE_FORMAT_ERR, IB_WC_LOC_QP_OP_ERR, + ERDMA_WC_VENDOR_INVALID_SQE }, + { ERDMA_WC_SEND_WQE_ORD_EXCEED, IB_WC_GENERAL_ERR, + ERDMA_WC_VENDOR_ZERO_ORD }, + { ERDMA_WC_SEND_STAG_INVALID_ERR, IB_WC_LOC_ACCESS_ERR, + ERDMA_WC_VENDOR_SQE_INVALID_STAG }, + { ERDMA_WC_SEND_ADDR_VIOLATION_ERR, IB_WC_LOC_ACCESS_ERR, + ERDMA_WC_VENDOR_SQE_ADDR_VIOLATION }, + { ERDMA_WC_SEND_RIGHT_VIOLATION_ERR, IB_WC_LOC_ACCESS_ERR, + ERDMA_WC_VENDOR_SQE_ACCESS_ERR }, + { ERDMA_WC_SEND_PDID_ERR, IB_WC_LOC_ACCESS_ERR, + ERDMA_WC_VENDOR_SQE_INVALID_PD }, + { ERDMA_WC_SEND_WARRPING_ERR, IB_WC_LOC_ACCESS_ERR, + ERDMA_WC_VENDOR_SQE_WARP_ERR }, + { ERDMA_WC_FLUSH_ERR, IB_WC_WR_FLUSH_ERR, ERDMA_WC_VENDOR_NO_ERR }, + { ERDMA_WC_RETRY_EXC_ERR, IB_WC_RETRY_EXC_ERR, ERDMA_WC_VENDOR_NO_ERR }, +}; + +#define ERDMA_POLLCQ_NO_QP 1 + +static int erdma_poll_one_cqe(struct erdma_cq *cq, struct ib_wc *wc) +{ + struct erdma_dev *dev = to_edev(cq->ibcq.device); + u8 opcode, syndrome, qtype; + struct erdma_kqp *kern_qp; + struct erdma_cqe *cqe; + struct erdma_qp *qp; + u16 wqe_idx, depth; + u32 qpn, cqe_hdr; + u64 *id_table; + u64 *wqe_hdr; + + cqe = get_next_valid_cqe(cq); + if (!cqe) + return -EAGAIN; + + cq->kern_cq.ci++; + + /* cqbuf should be ready when we poll */ + dma_rmb(); + + qpn = be32_to_cpu(cqe->qpn); + wqe_idx = be32_to_cpu(cqe->qe_idx); + cqe_hdr = be32_to_cpu(cqe->hdr); + + qp = find_qp_by_qpn(dev, qpn); + if (!qp) + return ERDMA_POLLCQ_NO_QP; + + kern_qp = &qp->kern_qp; + + qtype = FIELD_GET(ERDMA_CQE_HDR_QTYPE_MASK, cqe_hdr); + syndrome = FIELD_GET(ERDMA_CQE_HDR_SYNDROME_MASK, cqe_hdr); + opcode = FIELD_GET(ERDMA_CQE_HDR_OPCODE_MASK, cqe_hdr); + + if (qtype == ERDMA_CQE_QTYPE_SQ) { + id_table = kern_qp->swr_tbl; + depth = qp->attrs.sq_size; + wqe_hdr = get_queue_entry(qp->kern_qp.sq_buf, wqe_idx, + qp->attrs.sq_size, SQEBB_SHIFT); + kern_qp->sq_ci = + FIELD_GET(ERDMA_SQE_HDR_WQEBB_CNT_MASK, *wqe_hdr) + + wqe_idx + 1; + } else { + id_table = kern_qp->rwr_tbl; + depth = qp->attrs.rq_size; + } + wc->wr_id = id_table[wqe_idx & (depth - 1)]; + wc->byte_len = be32_to_cpu(cqe->size); + + wc->wc_flags = 0; + + wc->opcode = wc_mapping_table[opcode]; + if (opcode == ERDMA_OP_RECV_IMM || opcode == ERDMA_OP_RSP_SEND_IMM) { + wc->ex.imm_data = cpu_to_be32(cqe->imm_data); + wc->wc_flags |= IB_WC_WITH_IMM; + } else if (opcode == ERDMA_OP_RECV_INV) { + wc->ex.invalidate_rkey = be32_to_cpu(cqe->inv_rkey); + wc->wc_flags |= IB_WC_WITH_INVALIDATE; + } + + if (syndrome >= ERDMA_NUM_WC_STATUS) + syndrome = ERDMA_WC_GENERAL_ERR; + + wc->status = map_cqe_status[syndrome].base; + wc->vendor_err = map_cqe_status[syndrome].vendor; + wc->qp = &qp->ibqp; + + return 0; +} + +int erdma_poll_cq(struct ib_cq *ibcq, int num_entries, struct ib_wc *wc) +{ + struct erdma_cq *cq = to_ecq(ibcq); + unsigned long flags; + int npolled, ret; + + spin_lock_irqsave(&cq->kern_cq.lock, flags); + + for (npolled = 0; npolled < num_entries;) { + ret = erdma_poll_one_cqe(cq, wc + npolled); + + if (ret == -EAGAIN) /* no received new CQEs. */ + break; + else if (ret) /* ignore invalid CQEs. */ + continue; + + npolled++; + } + + spin_unlock_irqrestore(&cq->kern_cq.lock, flags); + + return npolled; +} diff --git a/drivers/infiniband/hw/erdma/erdma_qp.c b/drivers/infiniband/hw/erdma/erdma_qp.c new file mode 100644 index 000000000000..bb96ce9ae6d1 --- /dev/null +++ b/drivers/infiniband/hw/erdma/erdma_qp.c @@ -0,0 +1,564 @@ +// SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause + +/* Authors: Cheng Xu */ +/* Kai Shen */ +/* Copyright (c) 2020-2021, Alibaba Group */ +/* Authors: Bernard Metzler */ +/* Copyright (c) 2008-2019, IBM Corporation */ + +#include +#include +#include +#include + +#include +#include +#include + +#include "erdma.h" +#include "erdma_cm.h" +#include "erdma_verbs.h" + +void erdma_qp_llp_close(struct erdma_qp *qp) +{ + struct erdma_qp_attrs qp_attrs; + + down_write(&qp->state_lock); + + switch (qp->attrs.state) { + case ERDMA_QP_STATE_RTS: + case ERDMA_QP_STATE_RTR: + case ERDMA_QP_STATE_IDLE: + case ERDMA_QP_STATE_TERMINATE: + qp_attrs.state = ERDMA_QP_STATE_CLOSING; + erdma_modify_qp_internal(qp, &qp_attrs, ERDMA_QP_ATTR_STATE); + break; + case ERDMA_QP_STATE_CLOSING: + qp->attrs.state = ERDMA_QP_STATE_IDLE; + break; + default: + break; + } + + if (qp->cep) { + erdma_cep_put(qp->cep); + qp->cep = NULL; + } + + up_write(&qp->state_lock); +} + +struct ib_qp *erdma_get_ibqp(struct ib_device *ibdev, int id) +{ + struct erdma_qp *qp = find_qp_by_qpn(to_edev(ibdev), id); + + if (qp) + return &qp->ibqp; + + return NULL; +} + +static int erdma_modify_qp_state_to_rts(struct erdma_qp *qp, + struct erdma_qp_attrs *attrs, + enum erdma_qp_attr_mask mask) +{ + int ret; + struct erdma_dev *dev = qp->dev; + struct erdma_cmdq_modify_qp_req req; + struct tcp_sock *tp; + struct erdma_cep *cep = qp->cep; + struct sockaddr_storage local_addr, remote_addr; + + if (!(mask & ERDMA_QP_ATTR_LLP_HANDLE)) + return -EINVAL; + + if (!(mask & ERDMA_QP_ATTR_MPA)) + return -EINVAL; + + ret = getname_local(cep->sock, &local_addr); + if (ret < 0) + return ret; + + ret = getname_peer(cep->sock, &remote_addr); + if (ret < 0) + return ret; + + qp->attrs.state = ERDMA_QP_STATE_RTS; + + tp = tcp_sk(qp->cep->sock->sk); + + erdma_cmdq_build_reqhdr(&req.hdr, CMDQ_SUBMOD_RDMA, + CMDQ_OPCODE_MODIFY_QP); + + req.cfg = FIELD_PREP(ERDMA_CMD_MODIFY_QP_STATE_MASK, qp->attrs.state) | + FIELD_PREP(ERDMA_CMD_MODIFY_QP_CC_MASK, qp->attrs.cc) | + FIELD_PREP(ERDMA_CMD_MODIFY_QP_QPN_MASK, QP_ID(qp)); + + req.cookie = qp->cep->mpa.ext_data.cookie; + req.dip = to_sockaddr_in(remote_addr).sin_addr.s_addr; + req.sip = to_sockaddr_in(local_addr).sin_addr.s_addr; + req.dport = to_sockaddr_in(remote_addr).sin_port; + req.sport = to_sockaddr_in(local_addr).sin_port; + + req.send_nxt = tp->snd_nxt; + /* rsvd tcp seq for mpa-rsp in server. */ + if (qp->attrs.qp_type == ERDMA_QP_PASSIVE) + req.send_nxt += MPA_DEFAULT_HDR_LEN + qp->attrs.pd_len; + req.recv_nxt = tp->rcv_nxt; + + return erdma_post_cmd_wait(&dev->cmdq, (u64 *)&req, sizeof(req), NULL, + NULL); +} + +static int erdma_modify_qp_state_to_stop(struct erdma_qp *qp, + struct erdma_qp_attrs *attrs, + enum erdma_qp_attr_mask mask) +{ + struct erdma_dev *dev = qp->dev; + struct erdma_cmdq_modify_qp_req req; + + qp->attrs.state = attrs->state; + + erdma_cmdq_build_reqhdr(&req.hdr, CMDQ_SUBMOD_RDMA, + CMDQ_OPCODE_MODIFY_QP); + + req.cfg = FIELD_PREP(ERDMA_CMD_MODIFY_QP_STATE_MASK, attrs->state) | + FIELD_PREP(ERDMA_CMD_MODIFY_QP_QPN_MASK, QP_ID(qp)); + + return erdma_post_cmd_wait(&dev->cmdq, (u64 *)&req, sizeof(req), NULL, + NULL); +} + +int erdma_modify_qp_internal(struct erdma_qp *qp, struct erdma_qp_attrs *attrs, + enum erdma_qp_attr_mask mask) +{ + int drop_conn, ret = 0; + + if (!mask) + return 0; + + if (!(mask & ERDMA_QP_ATTR_STATE)) + return 0; + + switch (qp->attrs.state) { + case ERDMA_QP_STATE_IDLE: + case ERDMA_QP_STATE_RTR: + if (attrs->state == ERDMA_QP_STATE_RTS) { + ret = erdma_modify_qp_state_to_rts(qp, attrs, mask); + } else if (attrs->state == ERDMA_QP_STATE_ERROR) { + qp->attrs.state = ERDMA_QP_STATE_ERROR; + if (qp->cep) { + erdma_cep_put(qp->cep); + qp->cep = NULL; + } + ret = erdma_modify_qp_state_to_stop(qp, attrs, mask); + } + break; + case ERDMA_QP_STATE_RTS: + drop_conn = 0; + + if (attrs->state == ERDMA_QP_STATE_CLOSING) { + ret = erdma_modify_qp_state_to_stop(qp, attrs, mask); + drop_conn = 1; + } else if (attrs->state == ERDMA_QP_STATE_TERMINATE) { + qp->attrs.state = ERDMA_QP_STATE_TERMINATE; + ret = erdma_modify_qp_state_to_stop(qp, attrs, mask); + drop_conn = 1; + } else if (attrs->state == ERDMA_QP_STATE_ERROR) { + ret = erdma_modify_qp_state_to_stop(qp, attrs, mask); + qp->attrs.state = ERDMA_QP_STATE_ERROR; + drop_conn = 1; + } + + if (drop_conn) + erdma_qp_cm_drop(qp); + + break; + case ERDMA_QP_STATE_TERMINATE: + if (attrs->state == ERDMA_QP_STATE_ERROR) + qp->attrs.state = ERDMA_QP_STATE_ERROR; + break; + case ERDMA_QP_STATE_CLOSING: + if (attrs->state == ERDMA_QP_STATE_IDLE) { + qp->attrs.state = ERDMA_QP_STATE_IDLE; + } else if (attrs->state == ERDMA_QP_STATE_ERROR) { + ret = erdma_modify_qp_state_to_stop(qp, attrs, mask); + qp->attrs.state = ERDMA_QP_STATE_ERROR; + } else if (attrs->state != ERDMA_QP_STATE_CLOSING) { + return -ECONNABORTED; + } + break; + default: + break; + } + + return ret; +} + +static void erdma_qp_safe_free(struct kref *ref) +{ + struct erdma_qp *qp = container_of(ref, struct erdma_qp, ref); + + complete(&qp->safe_free); +} + +void erdma_qp_put(struct erdma_qp *qp) +{ + WARN_ON(kref_read(&qp->ref) < 1); + kref_put(&qp->ref, erdma_qp_safe_free); +} + +void erdma_qp_get(struct erdma_qp *qp) +{ + kref_get(&qp->ref); +} + +static int fill_inline_data(struct erdma_qp *qp, + const struct ib_send_wr *send_wr, u16 wqe_idx, + u32 sgl_offset, u32 *length_field) +{ + u32 remain_size, copy_size, data_off, bytes = 0; + char *data; + int i = 0; + + wqe_idx += (sgl_offset >> SQEBB_SHIFT); + sgl_offset &= (SQEBB_SIZE - 1); + data = get_queue_entry(qp->kern_qp.sq_buf, wqe_idx, qp->attrs.sq_size, + SQEBB_SHIFT); + + while (i < send_wr->num_sge) { + bytes += send_wr->sg_list[i].length; + if (bytes > (int)ERDMA_MAX_INLINE) + return -EINVAL; + + remain_size = send_wr->sg_list[i].length; + data_off = 0; + + while (1) { + copy_size = min(remain_size, SQEBB_SIZE - sgl_offset); + + memcpy(data + sgl_offset, + (void *)(uintptr_t)send_wr->sg_list[i].addr + + data_off, + copy_size); + remain_size -= copy_size; + data_off += copy_size; + sgl_offset += copy_size; + wqe_idx += (sgl_offset >> SQEBB_SHIFT); + sgl_offset &= (SQEBB_SIZE - 1); + + data = get_queue_entry(qp->kern_qp.sq_buf, wqe_idx, + qp->attrs.sq_size, SQEBB_SHIFT); + if (!remain_size) + break; + }; + + i++; + } + *length_field = bytes; + + return bytes; +} + +static int fill_sgl(struct erdma_qp *qp, const struct ib_send_wr *send_wr, + u16 wqe_idx, u32 sgl_offset, u32 *length_field) +{ + int i = 0; + u32 bytes = 0; + char *sgl; + + if (send_wr->num_sge > qp->dev->attrs.max_send_sge) + return -EINVAL; + + if (sgl_offset & 0xF) + return -EINVAL; + + while (i < send_wr->num_sge) { + wqe_idx += (sgl_offset >> SQEBB_SHIFT); + sgl_offset &= (SQEBB_SIZE - 1); + sgl = get_queue_entry(qp->kern_qp.sq_buf, wqe_idx, + qp->attrs.sq_size, SQEBB_SHIFT); + + bytes += send_wr->sg_list[i].length; + memcpy(sgl + sgl_offset, &send_wr->sg_list[i], + sizeof(struct ib_sge)); + + sgl_offset += sizeof(struct ib_sge); + i++; + } + + *length_field = bytes; + return 0; +} + +static int erdma_push_one_sqe(struct erdma_qp *qp, u16 *pi, + const struct ib_send_wr *send_wr) +{ + u32 wqe_size, wqebb_cnt, hw_op, flags, sgl_offset, *length_field; + u32 idx = *pi & (qp->attrs.sq_size - 1); + enum ib_wr_opcode op = send_wr->opcode; + struct erdma_readreq_sqe *read_sqe; + struct erdma_reg_mr_sqe *regmr_sge; + struct erdma_write_sqe *write_sqe; + struct erdma_send_sqe *send_sqe; + struct ib_rdma_wr *rdma_wr; + struct erdma_mr *mr; + u64 wqe_hdr, *entry; + struct ib_sge *sge; + int ret; + + entry = get_queue_entry(qp->kern_qp.sq_buf, idx, qp->attrs.sq_size, + SQEBB_SHIFT); + + /* Clear the SQE header section. */ + *entry = 0; + + qp->kern_qp.swr_tbl[idx] = send_wr->wr_id; + flags = send_wr->send_flags; + wqe_hdr = FIELD_PREP( + ERDMA_SQE_HDR_CE_MASK, + ((flags & IB_SEND_SIGNALED) || qp->kern_qp.sig_all) ? 1 : 0); + wqe_hdr |= FIELD_PREP(ERDMA_SQE_HDR_SE_MASK, + flags & IB_SEND_SOLICITED ? 1 : 0); + wqe_hdr |= FIELD_PREP(ERDMA_SQE_HDR_FENCE_MASK, + flags & IB_SEND_FENCE ? 1 : 0); + wqe_hdr |= FIELD_PREP(ERDMA_SQE_HDR_INLINE_MASK, + flags & IB_SEND_INLINE ? 1 : 0); + wqe_hdr |= FIELD_PREP(ERDMA_SQE_HDR_QPN_MASK, QP_ID(qp)); + + switch (op) { + case IB_WR_RDMA_WRITE: + case IB_WR_RDMA_WRITE_WITH_IMM: + hw_op = ERDMA_OP_WRITE; + if (op == IB_WR_RDMA_WRITE_WITH_IMM) + hw_op = ERDMA_OP_WRITE_WITH_IMM; + wqe_hdr |= FIELD_PREP(ERDMA_SQE_HDR_OPCODE_MASK, hw_op); + rdma_wr = container_of(send_wr, struct ib_rdma_wr, wr); + write_sqe = (struct erdma_write_sqe *)entry; + + write_sqe->imm_data = send_wr->ex.imm_data; + write_sqe->sink_stag = rdma_wr->rkey; + write_sqe->sink_to_h = upper_32_bits(rdma_wr->remote_addr); + write_sqe->sink_to_l = lower_32_bits(rdma_wr->remote_addr); + + length_field = &write_sqe->length; + wqe_size = sizeof(struct erdma_write_sqe); + sgl_offset = wqe_size; + break; + case IB_WR_RDMA_READ: + case IB_WR_RDMA_READ_WITH_INV: + read_sqe = (struct erdma_readreq_sqe *)entry; + if (unlikely(send_wr->num_sge != 1)) + return -EINVAL; + hw_op = ERDMA_OP_READ; + if (op == IB_WR_RDMA_READ_WITH_INV) { + hw_op = ERDMA_OP_READ_WITH_INV; + read_sqe->invalid_stag = send_wr->ex.invalidate_rkey; + } + + wqe_hdr |= FIELD_PREP(ERDMA_SQE_HDR_OPCODE_MASK, hw_op); + rdma_wr = container_of(send_wr, struct ib_rdma_wr, wr); + read_sqe->length = send_wr->sg_list[0].length; + read_sqe->sink_stag = send_wr->sg_list[0].lkey; + read_sqe->sink_to_l = lower_32_bits(send_wr->sg_list[0].addr); + read_sqe->sink_to_h = upper_32_bits(send_wr->sg_list[0].addr); + + sge = get_queue_entry(qp->kern_qp.sq_buf, idx + 1, + qp->attrs.sq_size, SQEBB_SHIFT); + sge->addr = rdma_wr->remote_addr; + sge->lkey = rdma_wr->rkey; + sge->length = send_wr->sg_list[0].length; + wqe_size = sizeof(struct erdma_readreq_sqe) + + send_wr->num_sge * sizeof(struct ib_sge); + + goto out; + case IB_WR_SEND: + case IB_WR_SEND_WITH_IMM: + case IB_WR_SEND_WITH_INV: + send_sqe = (struct erdma_send_sqe *)entry; + hw_op = ERDMA_OP_SEND; + if (op == IB_WR_SEND_WITH_IMM) { + hw_op = ERDMA_OP_SEND_WITH_IMM; + send_sqe->imm_data = send_wr->ex.imm_data; + } else if (op == IB_WR_SEND_WITH_INV) { + hw_op = ERDMA_OP_SEND_WITH_INV; + send_sqe->imm_data = send_wr->ex.invalidate_rkey; + } + wqe_hdr |= FIELD_PREP(ERDMA_SQE_HDR_OPCODE_MASK, hw_op); + length_field = &send_sqe->length; + wqe_size = sizeof(struct erdma_send_sqe); + sgl_offset = wqe_size; + + break; + case IB_WR_REG_MR: + wqe_hdr |= + FIELD_PREP(ERDMA_SQE_HDR_OPCODE_MASK, ERDMA_OP_REG_MR); + regmr_sge = (struct erdma_reg_mr_sqe *)entry; + mr = to_emr(reg_wr(send_wr)->mr); + + mr->access = ERDMA_MR_ACC_LR | + to_erdma_access_flags(reg_wr(send_wr)->access); + regmr_sge->addr = mr->ibmr.iova; + regmr_sge->length = mr->ibmr.length; + regmr_sge->stag = mr->ibmr.lkey; + regmr_sge->attrs = + FIELD_PREP(ERDMA_SQE_MR_MODE_MASK, 0) | + FIELD_PREP(ERDMA_SQE_MR_ACCESS_MASK, mr->access) | + FIELD_PREP(ERDMA_SQE_MR_MTT_CNT_MASK, + mr->mem.mtt_nents); + + if (mr->mem.mtt_nents < ERDMA_MAX_INLINE_MTT_ENTRIES) { + regmr_sge->attrs |= + FIELD_PREP(ERDMA_SQE_MR_MTT_TYPE_MASK, 0); + /* Copy SGLs to SQE content to accelerate */ + memcpy(get_queue_entry(qp->kern_qp.sq_buf, idx + 1, + qp->attrs.sq_size, SQEBB_SHIFT), + mr->mem.mtt_buf, MTT_SIZE(mr->mem.mtt_nents)); + wqe_size = sizeof(struct erdma_reg_mr_sqe) + + MTT_SIZE(mr->mem.mtt_nents); + } else { + regmr_sge->attrs |= + FIELD_PREP(ERDMA_SQE_MR_MTT_TYPE_MASK, 1); + wqe_size = sizeof(struct erdma_reg_mr_sqe); + } + + goto out; + case IB_WR_LOCAL_INV: + wqe_hdr |= FIELD_PREP(ERDMA_SQE_HDR_OPCODE_MASK, + ERDMA_OP_LOCAL_INV); + regmr_sge = (struct erdma_reg_mr_sqe *)entry; + regmr_sge->stag = send_wr->ex.invalidate_rkey; + wqe_size = sizeof(struct erdma_reg_mr_sqe); + goto out; + default: + return -EOPNOTSUPP; + } + + if (flags & IB_SEND_INLINE) { + ret = fill_inline_data(qp, send_wr, idx, sgl_offset, + length_field); + if (ret < 0) + return -EINVAL; + wqe_size += ret; + wqe_hdr |= FIELD_PREP(ERDMA_SQE_HDR_SGL_LEN_MASK, ret); + } else { + ret = fill_sgl(qp, send_wr, idx, sgl_offset, length_field); + if (ret) + return -EINVAL; + wqe_size += send_wr->num_sge * sizeof(struct ib_sge); + wqe_hdr |= FIELD_PREP(ERDMA_SQE_HDR_SGL_LEN_MASK, + send_wr->num_sge); + } + +out: + wqebb_cnt = SQEBB_COUNT(wqe_size); + wqe_hdr |= FIELD_PREP(ERDMA_SQE_HDR_WQEBB_CNT_MASK, wqebb_cnt - 1); + *pi += wqebb_cnt; + wqe_hdr |= FIELD_PREP(ERDMA_SQE_HDR_WQEBB_INDEX_MASK, *pi); + + *entry = wqe_hdr; + + return 0; +} + +static void kick_sq_db(struct erdma_qp *qp, u16 pi) +{ + u64 db_data = FIELD_PREP(ERDMA_SQE_HDR_QPN_MASK, QP_ID(qp)) | + FIELD_PREP(ERDMA_SQE_HDR_WQEBB_INDEX_MASK, pi); + + *(u64 *)qp->kern_qp.sq_db_info = db_data; + writeq(db_data, qp->kern_qp.hw_sq_db); +} + +int erdma_post_send(struct ib_qp *ibqp, const struct ib_send_wr *send_wr, + const struct ib_send_wr **bad_send_wr) +{ + struct erdma_qp *qp = to_eqp(ibqp); + int ret = 0; + const struct ib_send_wr *wr = send_wr; + unsigned long flags; + u16 sq_pi; + + if (!send_wr) + return -EINVAL; + + spin_lock_irqsave(&qp->lock, flags); + sq_pi = qp->kern_qp.sq_pi; + + while (wr) { + if ((u16)(sq_pi - qp->kern_qp.sq_ci) >= qp->attrs.sq_size) { + ret = -ENOMEM; + *bad_send_wr = send_wr; + break; + } + + ret = erdma_push_one_sqe(qp, &sq_pi, wr); + if (ret) { + *bad_send_wr = wr; + break; + } + qp->kern_qp.sq_pi = sq_pi; + kick_sq_db(qp, sq_pi); + + wr = wr->next; + } + spin_unlock_irqrestore(&qp->lock, flags); + + return ret; +} + +static int erdma_post_recv_one(struct erdma_qp *qp, + const struct ib_recv_wr *recv_wr) +{ + struct erdma_rqe *rqe; + unsigned int rq_pi; + u16 idx; + + rq_pi = qp->kern_qp.rq_pi; + idx = rq_pi & (qp->attrs.rq_size - 1); + rqe = (struct erdma_rqe *)qp->kern_qp.rq_buf + idx; + + rqe->qe_idx = rq_pi + 1; + rqe->qpn = QP_ID(qp); + + if (recv_wr->num_sge == 0) { + rqe->length = 0; + } else if (recv_wr->num_sge == 1) { + rqe->stag = recv_wr->sg_list[0].lkey; + rqe->to = recv_wr->sg_list[0].addr; + rqe->length = recv_wr->sg_list[0].length; + } else { + return -EINVAL; + } + + *(u64 *)qp->kern_qp.rq_db_info = *(u64 *)rqe; + writeq(*(u64 *)rqe, qp->kern_qp.hw_rq_db); + + qp->kern_qp.rwr_tbl[idx] = recv_wr->wr_id; + qp->kern_qp.rq_pi = rq_pi + 1; + + return 0; +} + +int erdma_post_recv(struct ib_qp *ibqp, const struct ib_recv_wr *recv_wr, + const struct ib_recv_wr **bad_recv_wr) +{ + const struct ib_recv_wr *wr = recv_wr; + struct erdma_qp *qp = to_eqp(ibqp); + unsigned long flags; + int ret; + + spin_lock_irqsave(&qp->lock, flags); + + while (wr) { + ret = erdma_post_recv_one(qp, wr); + if (ret) { + *bad_recv_wr = wr; + break; + } + wr = wr->next; + } + + spin_unlock_irqrestore(&qp->lock, flags); + return ret; +} diff --git a/drivers/infiniband/hw/erdma/erdma_verbs.c b/drivers/infiniband/hw/erdma/erdma_verbs.c new file mode 100644 index 000000000000..8ee21fb98f79 --- /dev/null +++ b/drivers/infiniband/hw/erdma/erdma_verbs.c @@ -0,0 +1,1461 @@ +// SPDX-License-Identifier: GPL-2.0 + +/* Authors: Cheng Xu */ +/* Kai Shen */ +/* Copyright (c) 2020-2022, Alibaba Group. */ + +/* Authors: Bernard Metzler */ +/* Copyright (c) 2008-2019, IBM Corporation */ + +/* Copyright (c) 2013-2015, Mellanox Technologies. All rights reserved. */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include "erdma.h" +#include "erdma_cm.h" +#include "erdma_hw.h" +#include "erdma_verbs.h" + +static int create_qp_cmd(struct erdma_dev *dev, struct erdma_qp *qp) +{ + struct erdma_cmdq_create_qp_req req; + struct erdma_pd *pd = to_epd(qp->ibqp.pd); + struct erdma_uqp *user_qp; + u64 resp0, resp1; + int err; + + erdma_cmdq_build_reqhdr(&req.hdr, CMDQ_SUBMOD_RDMA, + CMDQ_OPCODE_CREATE_QP); + + req.cfg0 = FIELD_PREP(ERDMA_CMD_CREATE_QP_SQ_DEPTH_MASK, + ilog2(qp->attrs.sq_size)) | + FIELD_PREP(ERDMA_CMD_CREATE_QP_QPN_MASK, QP_ID(qp)); + req.cfg1 = FIELD_PREP(ERDMA_CMD_CREATE_QP_RQ_DEPTH_MASK, + ilog2(qp->attrs.rq_size)) | + FIELD_PREP(ERDMA_CMD_CREATE_QP_PD_MASK, pd->pdn); + + if (rdma_is_kernel_res(&qp->ibqp.res)) { + u32 pgsz_range = ilog2(SZ_1M) - PAGE_SHIFT; + + req.sq_cqn_mtt_cfg = + FIELD_PREP(ERDMA_CMD_CREATE_QP_PAGE_SIZE_MASK, + pgsz_range) | + FIELD_PREP(ERDMA_CMD_CREATE_QP_CQN_MASK, qp->scq->cqn); + req.rq_cqn_mtt_cfg = + FIELD_PREP(ERDMA_CMD_CREATE_QP_PAGE_SIZE_MASK, + pgsz_range) | + FIELD_PREP(ERDMA_CMD_CREATE_QP_CQN_MASK, qp->rcq->cqn); + + req.sq_mtt_cfg = + FIELD_PREP(ERDMA_CMD_CREATE_QP_PAGE_OFFSET_MASK, 0) | + FIELD_PREP(ERDMA_CMD_CREATE_QP_MTT_CNT_MASK, 1) | + FIELD_PREP(ERDMA_CMD_CREATE_QP_MTT_TYPE_MASK, + ERDMA_MR_INLINE_MTT); + req.rq_mtt_cfg = req.sq_mtt_cfg; + + req.rq_buf_addr = qp->kern_qp.rq_buf_dma_addr; + req.sq_buf_addr = qp->kern_qp.sq_buf_dma_addr; + req.sq_db_info_dma_addr = qp->kern_qp.sq_buf_dma_addr + + (qp->attrs.sq_size << SQEBB_SHIFT); + req.rq_db_info_dma_addr = qp->kern_qp.rq_buf_dma_addr + + (qp->attrs.rq_size << RQE_SHIFT); + } else { + user_qp = &qp->user_qp; + req.sq_cqn_mtt_cfg = FIELD_PREP( + ERDMA_CMD_CREATE_QP_PAGE_SIZE_MASK, + ilog2(user_qp->sq_mtt.page_size) - PAGE_SHIFT); + req.sq_cqn_mtt_cfg |= + FIELD_PREP(ERDMA_CMD_CREATE_QP_CQN_MASK, qp->scq->cqn); + + req.rq_cqn_mtt_cfg = FIELD_PREP( + ERDMA_CMD_CREATE_QP_PAGE_SIZE_MASK, + ilog2(user_qp->rq_mtt.page_size) - PAGE_SHIFT); + req.rq_cqn_mtt_cfg |= + FIELD_PREP(ERDMA_CMD_CREATE_QP_CQN_MASK, qp->rcq->cqn); + + req.sq_mtt_cfg = user_qp->sq_mtt.page_offset; + req.sq_mtt_cfg |= FIELD_PREP(ERDMA_CMD_CREATE_QP_MTT_CNT_MASK, + user_qp->sq_mtt.mtt_nents) | + FIELD_PREP(ERDMA_CMD_CREATE_QP_MTT_TYPE_MASK, + user_qp->sq_mtt.mtt_type); + + req.rq_mtt_cfg = user_qp->rq_mtt.page_offset; + req.rq_mtt_cfg |= FIELD_PREP(ERDMA_CMD_CREATE_QP_MTT_CNT_MASK, + user_qp->rq_mtt.mtt_nents) | + FIELD_PREP(ERDMA_CMD_CREATE_QP_MTT_TYPE_MASK, + user_qp->rq_mtt.mtt_type); + + req.sq_buf_addr = user_qp->sq_mtt.mtt_entry[0]; + req.rq_buf_addr = user_qp->rq_mtt.mtt_entry[0]; + + req.sq_db_info_dma_addr = user_qp->sq_db_info_dma_addr; + req.rq_db_info_dma_addr = user_qp->rq_db_info_dma_addr; + } + + err = erdma_post_cmd_wait(&dev->cmdq, (u64 *)&req, sizeof(req), &resp0, + &resp1); + + qp->attrs.cookie = + FIELD_GET(ERDMA_CMDQ_CREATE_QP_RESP_COOKIE_MASK, resp0); + + return err; +} + +static int regmr_cmd(struct erdma_dev *dev, struct erdma_mr *mr) +{ + struct erdma_cmdq_reg_mr_req req; + struct erdma_pd *pd = to_epd(mr->ibmr.pd); + u64 *phy_addr; + int i; + + erdma_cmdq_build_reqhdr(&req.hdr, CMDQ_SUBMOD_RDMA, CMDQ_OPCODE_REG_MR); + + req.cfg0 = FIELD_PREP(ERDMA_CMD_MR_VALID_MASK, mr->valid) | + FIELD_PREP(ERDMA_CMD_MR_KEY_MASK, mr->ibmr.lkey & 0xFF) | + FIELD_PREP(ERDMA_CMD_MR_MPT_IDX_MASK, mr->ibmr.lkey >> 8); + req.cfg1 = FIELD_PREP(ERDMA_CMD_REGMR_PD_MASK, pd->pdn) | + FIELD_PREP(ERDMA_CMD_REGMR_TYPE_MASK, mr->type) | + FIELD_PREP(ERDMA_CMD_REGMR_RIGHT_MASK, mr->access) | + FIELD_PREP(ERDMA_CMD_REGMR_ACC_MODE_MASK, 0); + req.cfg2 = FIELD_PREP(ERDMA_CMD_REGMR_PAGESIZE_MASK, + ilog2(mr->mem.page_size)) | + FIELD_PREP(ERDMA_CMD_REGMR_MTT_TYPE_MASK, mr->mem.mtt_type) | + FIELD_PREP(ERDMA_CMD_REGMR_MTT_CNT_MASK, mr->mem.page_cnt); + + if (mr->type == ERDMA_MR_TYPE_DMA) + goto post_cmd; + + if (mr->type == ERDMA_MR_TYPE_NORMAL) { + req.start_va = mr->mem.va; + req.size = mr->mem.len; + } + + if (mr->type == ERDMA_MR_TYPE_FRMR || + mr->mem.mtt_type == ERDMA_MR_INDIRECT_MTT) { + phy_addr = req.phy_addr; + *phy_addr = mr->mem.mtt_entry[0]; + } else { + phy_addr = req.phy_addr; + for (i = 0; i < mr->mem.mtt_nents; i++) + *phy_addr++ = mr->mem.mtt_entry[i]; + } + +post_cmd: + return erdma_post_cmd_wait(&dev->cmdq, (u64 *)&req, sizeof(req), NULL, + NULL); +} + +static int create_cq_cmd(struct erdma_dev *dev, struct erdma_cq *cq) +{ + struct erdma_cmdq_create_cq_req req; + u32 page_size; + struct erdma_mem *mtt; + + erdma_cmdq_build_reqhdr(&req.hdr, CMDQ_SUBMOD_RDMA, + CMDQ_OPCODE_CREATE_CQ); + + req.cfg0 = FIELD_PREP(ERDMA_CMD_CREATE_CQ_CQN_MASK, cq->cqn) | + FIELD_PREP(ERDMA_CMD_CREATE_CQ_DEPTH_MASK, ilog2(cq->depth)); + req.cfg1 = FIELD_PREP(ERDMA_CMD_CREATE_CQ_EQN_MASK, cq->assoc_eqn); + + if (rdma_is_kernel_res(&cq->ibcq.res)) { + page_size = SZ_32M; + req.cfg0 |= FIELD_PREP(ERDMA_CMD_CREATE_CQ_PAGESIZE_MASK, + ilog2(page_size) - PAGE_SHIFT); + req.qbuf_addr_l = lower_32_bits(cq->kern_cq.qbuf_dma_addr); + req.qbuf_addr_h = upper_32_bits(cq->kern_cq.qbuf_dma_addr); + + req.cfg1 |= FIELD_PREP(ERDMA_CMD_CREATE_CQ_MTT_CNT_MASK, 1) | + FIELD_PREP(ERDMA_CMD_CREATE_CQ_MTT_TYPE_MASK, + ERDMA_MR_INLINE_MTT); + + req.first_page_offset = 0; + req.cq_db_info_addr = + cq->kern_cq.qbuf_dma_addr + (cq->depth << CQE_SHIFT); + } else { + mtt = &cq->user_cq.qbuf_mtt; + req.cfg0 |= FIELD_PREP(ERDMA_CMD_CREATE_CQ_PAGESIZE_MASK, + ilog2(mtt->page_size) - PAGE_SHIFT); + if (mtt->mtt_nents == 1) { + req.qbuf_addr_l = lower_32_bits(*(u64 *)mtt->mtt_buf); + req.qbuf_addr_h = upper_32_bits(*(u64 *)mtt->mtt_buf); + } else { + req.qbuf_addr_l = lower_32_bits(mtt->mtt_entry[0]); + req.qbuf_addr_h = upper_32_bits(mtt->mtt_entry[0]); + } + req.cfg1 |= FIELD_PREP(ERDMA_CMD_CREATE_CQ_MTT_CNT_MASK, + mtt->mtt_nents); + req.cfg1 |= FIELD_PREP(ERDMA_CMD_CREATE_CQ_MTT_TYPE_MASK, + mtt->mtt_type); + + req.first_page_offset = mtt->page_offset; + req.cq_db_info_addr = cq->user_cq.db_info_dma_addr; + } + + return erdma_post_cmd_wait(&dev->cmdq, (u64 *)&req, sizeof(req), NULL, + NULL); +} + +static int erdma_alloc_idx(struct erdma_resource_cb *res_cb) +{ + int idx; + unsigned long flags; + + spin_lock_irqsave(&res_cb->lock, flags); + idx = find_next_zero_bit(res_cb->bitmap, res_cb->max_cap, + res_cb->next_alloc_idx); + if (idx == res_cb->max_cap) { + idx = find_first_zero_bit(res_cb->bitmap, res_cb->max_cap); + if (idx == res_cb->max_cap) { + res_cb->next_alloc_idx = 1; + spin_unlock_irqrestore(&res_cb->lock, flags); + return -ENOSPC; + } + } + + set_bit(idx, res_cb->bitmap); + res_cb->next_alloc_idx = idx + 1; + spin_unlock_irqrestore(&res_cb->lock, flags); + + return idx; +} + +static inline void erdma_free_idx(struct erdma_resource_cb *res_cb, u32 idx) +{ + unsigned long flags; + u32 used; + + spin_lock_irqsave(&res_cb->lock, flags); + used = test_and_clear_bit(idx, res_cb->bitmap); + spin_unlock_irqrestore(&res_cb->lock, flags); + WARN_ON(!used); +} + +static struct rdma_user_mmap_entry * +erdma_user_mmap_entry_insert(struct erdma_ucontext *uctx, void *address, + u32 size, u8 mmap_flag, u64 *mmap_offset) +{ + struct erdma_user_mmap_entry *entry = + kzalloc(sizeof(*entry), GFP_KERNEL); + int ret; + + if (!entry) + return NULL; + + entry->address = (u64)address; + entry->mmap_flag = mmap_flag; + + size = PAGE_ALIGN(size); + + ret = rdma_user_mmap_entry_insert(&uctx->ibucontext, &entry->rdma_entry, + size); + if (ret) { + kfree(entry); + return NULL; + } + + *mmap_offset = rdma_user_mmap_get_offset(&entry->rdma_entry); + + return &entry->rdma_entry; +} + +int erdma_query_device(struct ib_device *ibdev, struct ib_device_attr *attr, + struct ib_udata *unused) +{ + struct erdma_dev *dev = to_edev(ibdev); + + memset(attr, 0, sizeof(*attr)); + + attr->max_mr_size = dev->attrs.max_mr_size; + attr->vendor_id = PCI_VENDOR_ID_ALIBABA; + attr->vendor_part_id = dev->pdev->device; + attr->hw_ver = dev->pdev->revision; + attr->max_qp = dev->attrs.max_qp; + attr->max_qp_wr = min(dev->attrs.max_send_wr, dev->attrs.max_recv_wr); + attr->max_qp_rd_atom = dev->attrs.max_ord; + attr->max_qp_init_rd_atom = dev->attrs.max_ird; + attr->max_res_rd_atom = dev->attrs.max_qp * dev->attrs.max_ird; + attr->device_cap_flags = IB_DEVICE_MEM_MGT_EXTENSIONS; + attr->kernel_cap_flags = IBK_LOCAL_DMA_LKEY; + ibdev->local_dma_lkey = dev->attrs.local_dma_key; + attr->max_send_sge = dev->attrs.max_send_sge; + attr->max_recv_sge = dev->attrs.max_recv_sge; + attr->max_sge_rd = dev->attrs.max_sge_rd; + attr->max_cq = dev->attrs.max_cq; + attr->max_cqe = dev->attrs.max_cqe; + attr->max_mr = dev->attrs.max_mr; + attr->max_pd = dev->attrs.max_pd; + attr->max_mw = dev->attrs.max_mw; + attr->max_fast_reg_page_list_len = ERDMA_MAX_FRMR_PA; + attr->page_size_cap = ERDMA_PAGE_SIZE_SUPPORT; + attr->fw_ver = dev->attrs.fw_version; + + if (dev->netdev) + addrconf_addr_eui48((u8 *)&attr->sys_image_guid, + dev->netdev->dev_addr); + + return 0; +} + +int erdma_query_gid(struct ib_device *ibdev, u32 port, int idx, + union ib_gid *gid) +{ + struct erdma_dev *dev = to_edev(ibdev); + + memset(gid, 0, sizeof(*gid)); + ether_addr_copy(gid->raw, dev->attrs.peer_addr); + + return 0; +} + +int erdma_query_port(struct ib_device *ibdev, u32 port, + struct ib_port_attr *attr) +{ + struct erdma_dev *dev = to_edev(ibdev); + + memset(attr, 0, sizeof(*attr)); + + attr->state = dev->state; + if (dev->netdev) { + ib_get_eth_speed(ibdev, port, &attr->active_speed, + &attr->active_width); + attr->max_mtu = ib_mtu_int_to_enum(dev->netdev->mtu); + attr->active_mtu = ib_mtu_int_to_enum(dev->netdev->mtu); + } + + attr->gid_tbl_len = 1; + attr->port_cap_flags = IB_PORT_CM_SUP | IB_PORT_DEVICE_MGMT_SUP; + attr->max_msg_sz = -1; + if (dev->state == IB_PORT_ACTIVE) + attr->phys_state = IB_PORT_PHYS_STATE_LINK_UP; + else + attr->phys_state = IB_PORT_PHYS_STATE_DISABLED; + + return 0; +} + +int erdma_get_port_immutable(struct ib_device *ibdev, u32 port, + struct ib_port_immutable *port_immutable) +{ + port_immutable->gid_tbl_len = 1; + port_immutable->core_cap_flags = RDMA_CORE_PORT_IWARP; + + return 0; +} + +int erdma_alloc_pd(struct ib_pd *ibpd, struct ib_udata *udata) +{ + struct erdma_pd *pd = to_epd(ibpd); + struct erdma_dev *dev = to_edev(ibpd->device); + int pdn; + + pdn = erdma_alloc_idx(&dev->res_cb[ERDMA_RES_TYPE_PD]); + if (pdn < 0) + return pdn; + + pd->pdn = pdn; + + return 0; +} + +int erdma_dealloc_pd(struct ib_pd *ibpd, struct ib_udata *udata) +{ + struct erdma_pd *pd = to_epd(ibpd); + struct erdma_dev *dev = to_edev(ibpd->device); + + erdma_free_idx(&dev->res_cb[ERDMA_RES_TYPE_PD], pd->pdn); + + return 0; +} + +static int erdma_qp_validate_cap(struct erdma_dev *dev, + struct ib_qp_init_attr *attrs) +{ + if ((attrs->cap.max_send_wr > dev->attrs.max_send_wr) || + (attrs->cap.max_recv_wr > dev->attrs.max_recv_wr) || + (attrs->cap.max_send_sge > dev->attrs.max_send_sge) || + (attrs->cap.max_recv_sge > dev->attrs.max_recv_sge) || + (attrs->cap.max_inline_data > ERDMA_MAX_INLINE) || + !attrs->cap.max_send_wr || !attrs->cap.max_recv_wr) { + return -EINVAL; + } + + return 0; +} + +static int erdma_qp_validate_attr(struct erdma_dev *dev, + struct ib_qp_init_attr *attrs) +{ + if (attrs->qp_type != IB_QPT_RC) + return -EOPNOTSUPP; + + if (attrs->srq) + return -EOPNOTSUPP; + + if (!attrs->send_cq || !attrs->recv_cq) + return -EOPNOTSUPP; + + return 0; +} + +static void free_kernel_qp(struct erdma_qp *qp) +{ + struct erdma_dev *dev = qp->dev; + + vfree(qp->kern_qp.swr_tbl); + vfree(qp->kern_qp.rwr_tbl); + + if (qp->kern_qp.sq_buf) + dma_free_coherent( + &dev->pdev->dev, + WARPPED_BUFSIZE(qp->attrs.sq_size << SQEBB_SHIFT), + qp->kern_qp.sq_buf, qp->kern_qp.sq_buf_dma_addr); + + if (qp->kern_qp.rq_buf) + dma_free_coherent( + &dev->pdev->dev, + WARPPED_BUFSIZE(qp->attrs.rq_size << RQE_SHIFT), + qp->kern_qp.rq_buf, qp->kern_qp.rq_buf_dma_addr); +} + +static int init_kernel_qp(struct erdma_dev *dev, struct erdma_qp *qp, + struct ib_qp_init_attr *attrs) +{ + struct erdma_kqp *kqp = &qp->kern_qp; + int size; + + if (attrs->sq_sig_type == IB_SIGNAL_ALL_WR) + kqp->sig_all = 1; + + kqp->sq_pi = 0; + kqp->sq_ci = 0; + kqp->rq_pi = 0; + kqp->rq_ci = 0; + kqp->hw_sq_db = + dev->func_bar + (ERDMA_SDB_SHARED_PAGE_INDEX << PAGE_SHIFT); + kqp->hw_rq_db = dev->func_bar + ERDMA_BAR_RQDB_SPACE_OFFSET; + + kqp->swr_tbl = vmalloc(qp->attrs.sq_size * sizeof(u64)); + kqp->rwr_tbl = vmalloc(qp->attrs.rq_size * sizeof(u64)); + if (!kqp->swr_tbl || !kqp->rwr_tbl) + goto err_out; + + size = (qp->attrs.sq_size << SQEBB_SHIFT) + ERDMA_EXTRA_BUFFER_SIZE; + kqp->sq_buf = dma_alloc_coherent(&dev->pdev->dev, size, + &kqp->sq_buf_dma_addr, GFP_KERNEL); + if (!kqp->sq_buf) + goto err_out; + + size = (qp->attrs.rq_size << RQE_SHIFT) + ERDMA_EXTRA_BUFFER_SIZE; + kqp->rq_buf = dma_alloc_coherent(&dev->pdev->dev, size, + &kqp->rq_buf_dma_addr, GFP_KERNEL); + if (!kqp->rq_buf) + goto err_out; + + kqp->sq_db_info = kqp->sq_buf + (qp->attrs.sq_size << SQEBB_SHIFT); + kqp->rq_db_info = kqp->rq_buf + (qp->attrs.rq_size << RQE_SHIFT); + + return 0; + +err_out: + free_kernel_qp(qp); + return -ENOMEM; +} + +static int get_mtt_entries(struct erdma_dev *dev, struct erdma_mem *mem, + u64 start, u64 len, int access, u64 virt, + unsigned long req_page_size, u8 force_indirect_mtt) +{ + struct ib_block_iter biter; + uint64_t *phy_addr = NULL; + int ret = 0; + + mem->umem = ib_umem_get(&dev->ibdev, start, len, access); + if (IS_ERR(mem->umem)) { + ret = PTR_ERR(mem->umem); + mem->umem = NULL; + return ret; + } + + mem->va = virt; + mem->len = len; + mem->page_size = ib_umem_find_best_pgsz(mem->umem, req_page_size, virt); + mem->page_offset = start & (mem->page_size - 1); + mem->mtt_nents = ib_umem_num_dma_blocks(mem->umem, mem->page_size); + mem->page_cnt = mem->mtt_nents; + + if (mem->page_cnt > ERDMA_MAX_INLINE_MTT_ENTRIES || + force_indirect_mtt) { + mem->mtt_type = ERDMA_MR_INDIRECT_MTT; + mem->mtt_buf = + alloc_pages_exact(MTT_SIZE(mem->page_cnt), GFP_KERNEL); + if (!mem->mtt_buf) { + ret = -ENOMEM; + goto error_ret; + } + phy_addr = mem->mtt_buf; + } else { + mem->mtt_type = ERDMA_MR_INLINE_MTT; + phy_addr = mem->mtt_entry; + } + + rdma_umem_for_each_dma_block(mem->umem, &biter, mem->page_size) { + *phy_addr = rdma_block_iter_dma_address(&biter); + phy_addr++; + } + + if (mem->mtt_type == ERDMA_MR_INDIRECT_MTT) { + mem->mtt_entry[0] = + dma_map_single(&dev->pdev->dev, mem->mtt_buf, + MTT_SIZE(mem->page_cnt), DMA_TO_DEVICE); + if (dma_mapping_error(&dev->pdev->dev, mem->mtt_entry[0])) { + free_pages_exact(mem->mtt_buf, MTT_SIZE(mem->page_cnt)); + mem->mtt_buf = NULL; + ret = -ENOMEM; + goto error_ret; + } + } + + return 0; + +error_ret: + if (mem->umem) { + ib_umem_release(mem->umem); + mem->umem = NULL; + } + + return ret; +} + +static void put_mtt_entries(struct erdma_dev *dev, struct erdma_mem *mem) +{ + if (mem->mtt_buf) { + dma_unmap_single(&dev->pdev->dev, mem->mtt_entry[0], + MTT_SIZE(mem->page_cnt), DMA_TO_DEVICE); + free_pages_exact(mem->mtt_buf, MTT_SIZE(mem->page_cnt)); + } + + if (mem->umem) { + ib_umem_release(mem->umem); + mem->umem = NULL; + } +} + +static int erdma_map_user_dbrecords(struct erdma_ucontext *ctx, + u64 dbrecords_va, + struct erdma_user_dbrecords_page **dbr_page, + dma_addr_t *dma_addr) +{ + struct erdma_user_dbrecords_page *page = NULL; + int rv = 0; + + mutex_lock(&ctx->dbrecords_page_mutex); + + list_for_each_entry(page, &ctx->dbrecords_page_list, list) + if (page->va == (dbrecords_va & PAGE_MASK)) + goto found; + + page = kmalloc(sizeof(*page), GFP_KERNEL); + if (!page) { + rv = -ENOMEM; + goto out; + } + + page->va = (dbrecords_va & PAGE_MASK); + page->refcnt = 0; + + page->umem = ib_umem_get(ctx->ibucontext.device, + dbrecords_va & PAGE_MASK, PAGE_SIZE, 0); + if (IS_ERR(page->umem)) { + rv = PTR_ERR(page->umem); + kfree(page); + goto out; + } + + list_add(&page->list, &ctx->dbrecords_page_list); + +found: + *dma_addr = sg_dma_address(page->umem->sgt_append.sgt.sgl) + + (dbrecords_va & ~PAGE_MASK); + *dbr_page = page; + page->refcnt++; + +out: + mutex_unlock(&ctx->dbrecords_page_mutex); + return rv; +} + +static void +erdma_unmap_user_dbrecords(struct erdma_ucontext *ctx, + struct erdma_user_dbrecords_page **dbr_page) +{ + if (!ctx || !(*dbr_page)) + return; + + mutex_lock(&ctx->dbrecords_page_mutex); + if (--(*dbr_page)->refcnt == 0) { + list_del(&(*dbr_page)->list); + ib_umem_release((*dbr_page)->umem); + kfree(*dbr_page); + } + + *dbr_page = NULL; + mutex_unlock(&ctx->dbrecords_page_mutex); +} + +static int init_user_qp(struct erdma_qp *qp, struct erdma_ucontext *uctx, + u64 va, u32 len, u64 db_info_va) +{ + dma_addr_t db_info_dma_addr; + u32 rq_offset; + int ret; + + if (len < (PAGE_ALIGN(qp->attrs.sq_size * SQEBB_SIZE) + + qp->attrs.rq_size * RQE_SIZE)) + return -EINVAL; + + ret = get_mtt_entries(qp->dev, &qp->user_qp.sq_mtt, va, + qp->attrs.sq_size << SQEBB_SHIFT, 0, va, + (SZ_1M - SZ_4K), 1); + if (ret) + return ret; + + rq_offset = PAGE_ALIGN(qp->attrs.sq_size << SQEBB_SHIFT); + qp->user_qp.rq_offset = rq_offset; + + ret = get_mtt_entries(qp->dev, &qp->user_qp.rq_mtt, va + rq_offset, + qp->attrs.rq_size << RQE_SHIFT, 0, va + rq_offset, + (SZ_1M - SZ_4K), 1); + if (ret) + goto put_sq_mtt; + + ret = erdma_map_user_dbrecords(uctx, db_info_va, + &qp->user_qp.user_dbr_page, + &db_info_dma_addr); + if (ret) + goto put_rq_mtt; + + qp->user_qp.sq_db_info_dma_addr = db_info_dma_addr; + qp->user_qp.rq_db_info_dma_addr = db_info_dma_addr + ERDMA_DB_SIZE; + + return 0; + +put_rq_mtt: + put_mtt_entries(qp->dev, &qp->user_qp.rq_mtt); + +put_sq_mtt: + put_mtt_entries(qp->dev, &qp->user_qp.sq_mtt); + + return ret; +} + +static void free_user_qp(struct erdma_qp *qp, struct erdma_ucontext *uctx) +{ + put_mtt_entries(qp->dev, &qp->user_qp.sq_mtt); + put_mtt_entries(qp->dev, &qp->user_qp.rq_mtt); + erdma_unmap_user_dbrecords(uctx, &qp->user_qp.user_dbr_page); +} + +int erdma_create_qp(struct ib_qp *ibqp, struct ib_qp_init_attr *attrs, + struct ib_udata *udata) +{ + struct erdma_qp *qp = to_eqp(ibqp); + struct erdma_dev *dev = to_edev(ibqp->device); + struct erdma_ucontext *uctx = rdma_udata_to_drv_context( + udata, struct erdma_ucontext, ibucontext); + struct erdma_ureq_create_qp ureq; + struct erdma_uresp_create_qp uresp; + int ret; + + ret = erdma_qp_validate_cap(dev, attrs); + if (ret) + goto err_out; + + ret = erdma_qp_validate_attr(dev, attrs); + if (ret) + goto err_out; + + qp->scq = to_ecq(attrs->send_cq); + qp->rcq = to_ecq(attrs->recv_cq); + qp->dev = dev; + qp->attrs.cc = dev->attrs.cc; + + init_rwsem(&qp->state_lock); + kref_init(&qp->ref); + init_completion(&qp->safe_free); + + ret = xa_alloc_cyclic(&dev->qp_xa, &qp->ibqp.qp_num, qp, + XA_LIMIT(1, dev->attrs.max_qp - 1), + &dev->next_alloc_qpn, GFP_KERNEL); + if (ret < 0) { + ret = -ENOMEM; + goto err_out; + } + + qp->attrs.sq_size = roundup_pow_of_two(attrs->cap.max_send_wr * + ERDMA_MAX_WQEBB_PER_SQE); + qp->attrs.rq_size = roundup_pow_of_two(attrs->cap.max_recv_wr); + + if (uctx) { + ret = ib_copy_from_udata(&ureq, udata, + min(sizeof(ureq), udata->inlen)); + if (ret) + goto err_out_xa; + + ret = init_user_qp(qp, uctx, ureq.qbuf_va, ureq.qbuf_len, + ureq.db_record_va); + if (ret) + goto err_out_xa; + + memset(&uresp, 0, sizeof(uresp)); + + uresp.num_sqe = qp->attrs.sq_size; + uresp.num_rqe = qp->attrs.rq_size; + uresp.qp_id = QP_ID(qp); + uresp.rq_offset = qp->user_qp.rq_offset; + + ret = ib_copy_to_udata(udata, &uresp, sizeof(uresp)); + if (ret) + goto err_out_cmd; + } else { + init_kernel_qp(dev, qp, attrs); + } + + qp->attrs.max_send_sge = attrs->cap.max_send_sge; + qp->attrs.max_recv_sge = attrs->cap.max_recv_sge; + qp->attrs.state = ERDMA_QP_STATE_IDLE; + + ret = create_qp_cmd(dev, qp); + if (ret) + goto err_out_cmd; + + spin_lock_init(&qp->lock); + + return 0; + +err_out_cmd: + if (uctx) + free_user_qp(qp, uctx); + else + free_kernel_qp(qp); +err_out_xa: + xa_erase(&dev->qp_xa, QP_ID(qp)); +err_out: + return ret; +} + +static int erdma_create_stag(struct erdma_dev *dev, u32 *stag) +{ + int stag_idx; + + stag_idx = erdma_alloc_idx(&dev->res_cb[ERDMA_RES_TYPE_STAG_IDX]); + if (stag_idx < 0) + return stag_idx; + + /* For now, we always let key field be zero. */ + *stag = (stag_idx << 8); + + return 0; +} + +struct ib_mr *erdma_get_dma_mr(struct ib_pd *ibpd, int acc) +{ + struct erdma_mr *mr; + struct erdma_dev *dev = to_edev(ibpd->device); + int ret; + u32 stag; + + mr = kzalloc(sizeof(*mr), GFP_KERNEL); + if (!mr) + return ERR_PTR(-ENOMEM); + + ret = erdma_create_stag(dev, &stag); + if (ret) + goto out_free; + + mr->type = ERDMA_MR_TYPE_DMA; + + mr->ibmr.lkey = stag; + mr->ibmr.rkey = stag; + mr->ibmr.pd = ibpd; + mr->access = ERDMA_MR_ACC_LR | to_erdma_access_flags(acc); + ret = regmr_cmd(dev, mr); + if (ret) { + ret = -EIO; + goto out_remove_stag; + } + + return &mr->ibmr; + +out_remove_stag: + erdma_free_idx(&dev->res_cb[ERDMA_RES_TYPE_STAG_IDX], + mr->ibmr.lkey >> 8); + +out_free: + kfree(mr); + + return ERR_PTR(ret); +} + +struct ib_mr *erdma_ib_alloc_mr(struct ib_pd *ibpd, enum ib_mr_type mr_type, + u32 max_num_sg) +{ + struct erdma_mr *mr; + struct erdma_dev *dev = to_edev(ibpd->device); + int ret; + u32 stag; + + if (mr_type != IB_MR_TYPE_MEM_REG) + return ERR_PTR(-EOPNOTSUPP); + + if (max_num_sg > ERDMA_MR_MAX_MTT_CNT) + return ERR_PTR(-EINVAL); + + mr = kzalloc(sizeof(*mr), GFP_KERNEL); + if (!mr) + return ERR_PTR(-ENOMEM); + + ret = erdma_create_stag(dev, &stag); + if (ret) + goto out_free; + + mr->type = ERDMA_MR_TYPE_FRMR; + + mr->ibmr.lkey = stag; + mr->ibmr.rkey = stag; + mr->ibmr.pd = ibpd; + /* update it in FRMR. */ + mr->access = ERDMA_MR_ACC_LR | ERDMA_MR_ACC_LW | ERDMA_MR_ACC_RR | + ERDMA_MR_ACC_RW; + + mr->mem.page_size = PAGE_SIZE; /* update it later. */ + mr->mem.page_cnt = max_num_sg; + mr->mem.mtt_type = ERDMA_MR_INDIRECT_MTT; + mr->mem.mtt_buf = + alloc_pages_exact(MTT_SIZE(mr->mem.page_cnt), GFP_KERNEL); + if (!mr->mem.mtt_buf) { + ret = -ENOMEM; + goto out_remove_stag; + } + + mr->mem.mtt_entry[0] = + dma_map_single(&dev->pdev->dev, mr->mem.mtt_buf, + MTT_SIZE(mr->mem.page_cnt), DMA_TO_DEVICE); + if (dma_mapping_error(&dev->pdev->dev, mr->mem.mtt_entry[0])) { + ret = -ENOMEM; + goto out_free_mtt; + } + + ret = regmr_cmd(dev, mr); + if (ret) { + ret = -EIO; + goto out_dma_unmap; + } + + return &mr->ibmr; + +out_dma_unmap: + dma_unmap_single(&dev->pdev->dev, mr->mem.mtt_entry[0], + MTT_SIZE(mr->mem.page_cnt), DMA_TO_DEVICE); +out_free_mtt: + free_pages_exact(mr->mem.mtt_buf, MTT_SIZE(mr->mem.page_cnt)); + +out_remove_stag: + erdma_free_idx(&dev->res_cb[ERDMA_RES_TYPE_STAG_IDX], + mr->ibmr.lkey >> 8); + +out_free: + kfree(mr); + + return ERR_PTR(ret); +} + +static int erdma_set_page(struct ib_mr *ibmr, u64 addr) +{ + struct erdma_mr *mr = to_emr(ibmr); + + if (mr->mem.mtt_nents >= mr->mem.page_cnt) + return -1; + + *((u64 *)mr->mem.mtt_buf + mr->mem.mtt_nents) = addr; + mr->mem.mtt_nents++; + + return 0; +} + +int erdma_map_mr_sg(struct ib_mr *ibmr, struct scatterlist *sg, int sg_nents, + unsigned int *sg_offset) +{ + struct erdma_mr *mr = to_emr(ibmr); + int num; + + mr->mem.mtt_nents = 0; + + num = ib_sg_to_pages(&mr->ibmr, sg, sg_nents, sg_offset, + erdma_set_page); + + return num; +} + +struct ib_mr *erdma_reg_user_mr(struct ib_pd *ibpd, u64 start, u64 len, + u64 virt, int access, struct ib_udata *udata) +{ + struct erdma_mr *mr = NULL; + struct erdma_dev *dev = to_edev(ibpd->device); + u32 stag; + int ret; + + if (!len || len > dev->attrs.max_mr_size) + return ERR_PTR(-EINVAL); + + mr = kzalloc(sizeof(*mr), GFP_KERNEL); + if (!mr) + return ERR_PTR(-ENOMEM); + + ret = get_mtt_entries(dev, &mr->mem, start, len, access, virt, + SZ_2G - SZ_4K, 0); + if (ret) + goto err_out_free; + + ret = erdma_create_stag(dev, &stag); + if (ret) + goto err_out_put_mtt; + + mr->ibmr.lkey = mr->ibmr.rkey = stag; + mr->ibmr.pd = ibpd; + mr->mem.va = virt; + mr->mem.len = len; + mr->access = ERDMA_MR_ACC_LR | to_erdma_access_flags(access); + mr->valid = 1; + mr->type = ERDMA_MR_TYPE_NORMAL; + + ret = regmr_cmd(dev, mr); + if (ret) { + ret = -EIO; + goto err_out_mr; + } + + return &mr->ibmr; + +err_out_mr: + erdma_free_idx(&dev->res_cb[ERDMA_RES_TYPE_STAG_IDX], + mr->ibmr.lkey >> 8); + +err_out_put_mtt: + put_mtt_entries(dev, &mr->mem); + +err_out_free: + kfree(mr); + + return ERR_PTR(ret); +} + +int erdma_dereg_mr(struct ib_mr *ibmr, struct ib_udata *udata) +{ + struct erdma_mr *mr; + struct erdma_dev *dev = to_edev(ibmr->device); + struct erdma_cmdq_dereg_mr_req req; + int ret; + + mr = to_emr(ibmr); + + erdma_cmdq_build_reqhdr(&req.hdr, CMDQ_SUBMOD_RDMA, + CMDQ_OPCODE_DEREG_MR); + + req.cfg = FIELD_PREP(ERDMA_CMD_MR_MPT_IDX_MASK, ibmr->lkey >> 8) | + FIELD_PREP(ERDMA_CMD_MR_KEY_MASK, ibmr->lkey & 0xFF); + + ret = erdma_post_cmd_wait(&dev->cmdq, (u64 *)&req, sizeof(req), NULL, + NULL); + if (ret) + return ret; + + erdma_free_idx(&dev->res_cb[ERDMA_RES_TYPE_STAG_IDX], ibmr->lkey >> 8); + + put_mtt_entries(dev, &mr->mem); + + kfree(mr); + return 0; +} + +int erdma_destroy_cq(struct ib_cq *ibcq, struct ib_udata *udata) +{ + struct erdma_cq *cq = to_ecq(ibcq); + struct erdma_dev *dev = to_edev(ibcq->device); + struct erdma_ucontext *ctx = rdma_udata_to_drv_context( + udata, struct erdma_ucontext, ibucontext); + int err; + struct erdma_cmdq_destroy_cq_req req; + + erdma_cmdq_build_reqhdr(&req.hdr, CMDQ_SUBMOD_RDMA, + CMDQ_OPCODE_DESTROY_CQ); + req.cqn = cq->cqn; + + err = erdma_post_cmd_wait(&dev->cmdq, (u64 *)&req, sizeof(req), NULL, + NULL); + if (err) + return err; + + if (rdma_is_kernel_res(&cq->ibcq.res)) { + dma_free_coherent(&dev->pdev->dev, + WARPPED_BUFSIZE(cq->depth << CQE_SHIFT), + cq->kern_cq.qbuf, cq->kern_cq.qbuf_dma_addr); + } else { + erdma_unmap_user_dbrecords(ctx, &cq->user_cq.user_dbr_page); + put_mtt_entries(dev, &cq->user_cq.qbuf_mtt); + } + + xa_erase(&dev->cq_xa, cq->cqn); + + return 0; +} + +int erdma_destroy_qp(struct ib_qp *ibqp, struct ib_udata *udata) +{ + struct erdma_qp *qp = to_eqp(ibqp); + struct erdma_dev *dev = to_edev(ibqp->device); + struct erdma_ucontext *ctx = rdma_udata_to_drv_context( + udata, struct erdma_ucontext, ibucontext); + struct erdma_qp_attrs qp_attrs; + int err; + struct erdma_cmdq_destroy_qp_req req; + + down_write(&qp->state_lock); + qp_attrs.state = ERDMA_QP_STATE_ERROR; + erdma_modify_qp_internal(qp, &qp_attrs, ERDMA_QP_ATTR_STATE); + up_write(&qp->state_lock); + + erdma_cmdq_build_reqhdr(&req.hdr, CMDQ_SUBMOD_RDMA, + CMDQ_OPCODE_DESTROY_QP); + req.qpn = QP_ID(qp); + + err = erdma_post_cmd_wait(&dev->cmdq, (u64 *)&req, sizeof(req), NULL, + NULL); + if (err) + return err; + + erdma_qp_put(qp); + wait_for_completion(&qp->safe_free); + + if (rdma_is_kernel_res(&qp->ibqp.res)) { + vfree(qp->kern_qp.swr_tbl); + vfree(qp->kern_qp.rwr_tbl); + dma_free_coherent( + &dev->pdev->dev, + WARPPED_BUFSIZE(qp->attrs.rq_size << RQE_SHIFT), + qp->kern_qp.rq_buf, qp->kern_qp.rq_buf_dma_addr); + dma_free_coherent( + &dev->pdev->dev, + WARPPED_BUFSIZE(qp->attrs.sq_size << SQEBB_SHIFT), + qp->kern_qp.sq_buf, qp->kern_qp.sq_buf_dma_addr); + } else { + put_mtt_entries(dev, &qp->user_qp.sq_mtt); + put_mtt_entries(dev, &qp->user_qp.rq_mtt); + erdma_unmap_user_dbrecords(ctx, &qp->user_qp.user_dbr_page); + } + + if (qp->cep) + erdma_cep_put(qp->cep); + xa_erase(&dev->qp_xa, QP_ID(qp)); + + return 0; +} + +void erdma_qp_get_ref(struct ib_qp *ibqp) +{ + erdma_qp_get(to_eqp(ibqp)); +} + +void erdma_qp_put_ref(struct ib_qp *ibqp) +{ + erdma_qp_put(to_eqp(ibqp)); +} + +int erdma_mmap(struct ib_ucontext *ctx, struct vm_area_struct *vma) +{ + struct rdma_user_mmap_entry *rdma_entry; + struct erdma_user_mmap_entry *entry; + pgprot_t prot; + int err; + + rdma_entry = rdma_user_mmap_entry_get(ctx, vma); + if (!rdma_entry) + return -EINVAL; + + entry = to_emmap(rdma_entry); + + switch (entry->mmap_flag) { + case ERDMA_MMAP_IO_NC: + /* map doorbell. */ + prot = pgprot_device(vma->vm_page_prot); + break; + default: + return -EINVAL; + } + + err = rdma_user_mmap_io(ctx, vma, PFN_DOWN(entry->address), PAGE_SIZE, + prot, rdma_entry); + + rdma_user_mmap_entry_put(rdma_entry); + return err; +} + +void erdma_mmap_free(struct rdma_user_mmap_entry *rdma_entry) +{ + struct erdma_user_mmap_entry *entry = to_emmap(rdma_entry); + + kfree(entry); +} + +#define ERDMA_SDB_PAGE 0 +#define ERDMA_SDB_ENTRY 1 +#define ERDMA_SDB_SHARED 2 + +static void alloc_db_resources(struct erdma_dev *dev, + struct erdma_ucontext *ctx) +{ + u32 bitmap_idx; + struct erdma_devattr *attrs = &dev->attrs; + + if (attrs->disable_dwqe) + goto alloc_normal_db; + + /* Try to alloc independent SDB page. */ + spin_lock(&dev->db_bitmap_lock); + bitmap_idx = find_first_zero_bit(dev->sdb_page, attrs->dwqe_pages); + if (bitmap_idx != attrs->dwqe_pages) { + set_bit(bitmap_idx, dev->sdb_page); + spin_unlock(&dev->db_bitmap_lock); + + ctx->sdb_type = ERDMA_SDB_PAGE; + ctx->sdb_idx = bitmap_idx; + ctx->sdb_page_idx = bitmap_idx; + ctx->sdb = dev->func_bar_addr + ERDMA_BAR_SQDB_SPACE_OFFSET + + (bitmap_idx << PAGE_SHIFT); + ctx->sdb_page_off = 0; + + return; + } + + bitmap_idx = find_first_zero_bit(dev->sdb_entry, attrs->dwqe_entries); + if (bitmap_idx != attrs->dwqe_entries) { + set_bit(bitmap_idx, dev->sdb_entry); + spin_unlock(&dev->db_bitmap_lock); + + ctx->sdb_type = ERDMA_SDB_ENTRY; + ctx->sdb_idx = bitmap_idx; + ctx->sdb_page_idx = attrs->dwqe_pages + + bitmap_idx / ERDMA_DWQE_TYPE1_CNT_PER_PAGE; + ctx->sdb_page_off = bitmap_idx % ERDMA_DWQE_TYPE1_CNT_PER_PAGE; + + ctx->sdb = dev->func_bar_addr + ERDMA_BAR_SQDB_SPACE_OFFSET + + (ctx->sdb_page_idx << PAGE_SHIFT); + + return; + } + + spin_unlock(&dev->db_bitmap_lock); + +alloc_normal_db: + ctx->sdb_type = ERDMA_SDB_SHARED; + ctx->sdb_idx = 0; + ctx->sdb_page_idx = ERDMA_SDB_SHARED_PAGE_INDEX; + ctx->sdb_page_off = 0; + + ctx->sdb = dev->func_bar_addr + (ctx->sdb_page_idx << PAGE_SHIFT); +} + +static void erdma_uctx_user_mmap_entries_remove(struct erdma_ucontext *uctx) +{ + rdma_user_mmap_entry_remove(uctx->sq_db_mmap_entry); + rdma_user_mmap_entry_remove(uctx->rq_db_mmap_entry); + rdma_user_mmap_entry_remove(uctx->cq_db_mmap_entry); +} + +int erdma_alloc_ucontext(struct ib_ucontext *ibctx, struct ib_udata *udata) +{ + struct erdma_ucontext *ctx = to_ectx(ibctx); + struct erdma_dev *dev = to_edev(ibctx->device); + int ret; + struct erdma_uresp_alloc_ctx uresp = {}; + + if (atomic_inc_return(&dev->num_ctx) > ERDMA_MAX_CONTEXT) { + ret = -ENOMEM; + goto err_out; + } + + INIT_LIST_HEAD(&ctx->dbrecords_page_list); + mutex_init(&ctx->dbrecords_page_mutex); + + alloc_db_resources(dev, ctx); + + ctx->rdb = dev->func_bar_addr + ERDMA_BAR_RQDB_SPACE_OFFSET; + ctx->cdb = dev->func_bar_addr + ERDMA_BAR_CQDB_SPACE_OFFSET; + + if (udata->outlen < sizeof(uresp)) { + ret = -EINVAL; + goto err_out; + } + + ctx->sq_db_mmap_entry = erdma_user_mmap_entry_insert( + ctx, (void *)ctx->sdb, PAGE_SIZE, ERDMA_MMAP_IO_NC, &uresp.sdb); + if (!ctx->sq_db_mmap_entry) { + ret = -ENOMEM; + goto err_out; + } + + ctx->rq_db_mmap_entry = erdma_user_mmap_entry_insert( + ctx, (void *)ctx->rdb, PAGE_SIZE, ERDMA_MMAP_IO_NC, &uresp.rdb); + if (!ctx->sq_db_mmap_entry) { + ret = -EINVAL; + goto err_out; + } + + ctx->cq_db_mmap_entry = erdma_user_mmap_entry_insert( + ctx, (void *)ctx->cdb, PAGE_SIZE, ERDMA_MMAP_IO_NC, &uresp.cdb); + if (!ctx->cq_db_mmap_entry) { + ret = -EINVAL; + goto err_out; + } + + uresp.dev_id = dev->pdev->device; + uresp.sdb_type = ctx->sdb_type; + uresp.sdb_offset = ctx->sdb_page_off; + + ret = ib_copy_to_udata(udata, &uresp, sizeof(uresp)); + if (ret) + goto err_out; + + return 0; + +err_out: + erdma_uctx_user_mmap_entries_remove(ctx); + atomic_dec(&dev->num_ctx); + return ret; +} + +void erdma_dealloc_ucontext(struct ib_ucontext *ibctx) +{ + struct erdma_ucontext *ctx = to_ectx(ibctx); + struct erdma_dev *dev = to_edev(ibctx->device); + + spin_lock(&dev->db_bitmap_lock); + if (ctx->sdb_type == ERDMA_SDB_PAGE) + clear_bit(ctx->sdb_idx, dev->sdb_page); + else if (ctx->sdb_type == ERDMA_SDB_ENTRY) + clear_bit(ctx->sdb_idx, dev->sdb_entry); + + erdma_uctx_user_mmap_entries_remove(ctx); + + spin_unlock(&dev->db_bitmap_lock); + + atomic_dec(&dev->num_ctx); +} + +static int ib_qp_state_to_erdma_qp_state[IB_QPS_ERR + 1] = { + [IB_QPS_RESET] = ERDMA_QP_STATE_IDLE, + [IB_QPS_INIT] = ERDMA_QP_STATE_IDLE, + [IB_QPS_RTR] = ERDMA_QP_STATE_RTR, + [IB_QPS_RTS] = ERDMA_QP_STATE_RTS, + [IB_QPS_SQD] = ERDMA_QP_STATE_CLOSING, + [IB_QPS_SQE] = ERDMA_QP_STATE_TERMINATE, + [IB_QPS_ERR] = ERDMA_QP_STATE_ERROR +}; + +int erdma_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask, + struct ib_udata *udata) +{ + struct erdma_qp_attrs new_attrs; + enum erdma_qp_attr_mask erdma_attr_mask = 0; + struct erdma_qp *qp = to_eqp(ibqp); + int ret = 0; + + if (attr_mask & ~IB_QP_ATTR_STANDARD_BITS) + return -EOPNOTSUPP; + + memset(&new_attrs, 0, sizeof(new_attrs)); + + if (attr_mask & IB_QP_STATE) { + new_attrs.state = ib_qp_state_to_erdma_qp_state[attr->qp_state]; + + erdma_attr_mask |= ERDMA_QP_ATTR_STATE; + } + + down_write(&qp->state_lock); + + ret = erdma_modify_qp_internal(qp, &new_attrs, erdma_attr_mask); + + up_write(&qp->state_lock); + + return ret; +} + +int erdma_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 erdma_qp *qp; + struct erdma_dev *dev; + + if (ibqp && qp_attr && qp_init_attr) { + qp = to_eqp(ibqp); + dev = to_edev(ibqp->device); + } else { + return -EINVAL; + } + + qp_attr->cap.max_inline_data = ERDMA_MAX_INLINE; + qp_init_attr->cap.max_inline_data = ERDMA_MAX_INLINE; + + qp_attr->cap.max_send_wr = qp->attrs.sq_size; + qp_attr->cap.max_recv_wr = qp->attrs.rq_size; + qp_attr->cap.max_send_sge = qp->attrs.max_send_sge; + qp_attr->cap.max_recv_sge = qp->attrs.max_recv_sge; + + qp_attr->path_mtu = ib_mtu_int_to_enum(dev->netdev->mtu); + qp_attr->max_rd_atomic = qp->attrs.irq_size; + qp_attr->max_dest_rd_atomic = qp->attrs.orq_size; + + qp_attr->qp_access_flags = IB_ACCESS_LOCAL_WRITE | + IB_ACCESS_REMOTE_WRITE | + IB_ACCESS_REMOTE_READ; + + qp_init_attr->cap = qp_attr->cap; + + return 0; +} + +static int erdma_init_user_cq(struct erdma_ucontext *ctx, struct erdma_cq *cq, + struct erdma_ureq_create_cq *ureq) +{ + int ret; + struct erdma_dev *dev = to_edev(cq->ibcq.device); + + ret = get_mtt_entries(dev, &cq->user_cq.qbuf_mtt, ureq->qbuf_va, + ureq->qbuf_len, 0, ureq->qbuf_va, SZ_64M - SZ_4K, + 1); + if (ret) + return ret; + + ret = erdma_map_user_dbrecords(ctx, ureq->db_record_va, + &cq->user_cq.user_dbr_page, + &cq->user_cq.db_info_dma_addr); + if (ret) + put_mtt_entries(dev, &cq->user_cq.qbuf_mtt); + + return ret; +} + +static int erdma_init_kernel_cq(struct erdma_cq *cq) +{ + struct erdma_dev *dev = to_edev(cq->ibcq.device); + + cq->kern_cq.qbuf = + dma_alloc_coherent(&dev->pdev->dev, + WARPPED_BUFSIZE(cq->depth << CQE_SHIFT), + &cq->kern_cq.qbuf_dma_addr, GFP_KERNEL); + if (!cq->kern_cq.qbuf) + return -ENOMEM; + + cq->kern_cq.db_record = + (u64 *)(cq->kern_cq.qbuf + (cq->depth << CQE_SHIFT)); + spin_lock_init(&cq->kern_cq.lock); + /* use default cqdb addr */ + cq->kern_cq.db = dev->func_bar + ERDMA_BAR_CQDB_SPACE_OFFSET; + + return 0; +} + +int erdma_create_cq(struct ib_cq *ibcq, const struct ib_cq_init_attr *attr, + struct ib_udata *udata) +{ + struct erdma_cq *cq = to_ecq(ibcq); + struct erdma_dev *dev = to_edev(ibcq->device); + unsigned int depth = attr->cqe; + int ret; + struct erdma_ucontext *ctx = rdma_udata_to_drv_context( + udata, struct erdma_ucontext, ibucontext); + + if (depth > dev->attrs.max_cqe) + return -EINVAL; + + depth = roundup_pow_of_two(depth); + cq->ibcq.cqe = depth; + cq->depth = depth; + cq->assoc_eqn = attr->comp_vector + 1; + + ret = xa_alloc_cyclic(&dev->cq_xa, &cq->cqn, cq, + XA_LIMIT(1, dev->attrs.max_cq - 1), + &dev->next_alloc_cqn, GFP_KERNEL); + if (ret < 0) + return ret; + + if (!rdma_is_kernel_res(&ibcq->res)) { + struct erdma_ureq_create_cq ureq; + struct erdma_uresp_create_cq uresp; + + ret = ib_copy_from_udata(&ureq, udata, + min(udata->inlen, sizeof(ureq))); + if (ret) + goto err_out_xa; + + ret = erdma_init_user_cq(ctx, cq, &ureq); + if (ret) + goto err_out_xa; + + uresp.cq_id = cq->cqn; + uresp.num_cqe = depth; + + ret = ib_copy_to_udata(udata, &uresp, + min(sizeof(uresp), udata->outlen)); + if (ret) + goto err_free_res; + } else { + ret = erdma_init_kernel_cq(cq); + if (ret) + goto err_out_xa; + } + + ret = create_cq_cmd(dev, cq); + if (ret) + goto err_free_res; + + return 0; + +err_free_res: + if (!rdma_is_kernel_res(&ibcq->res)) { + erdma_unmap_user_dbrecords(ctx, &cq->user_cq.user_dbr_page); + put_mtt_entries(dev, &cq->user_cq.qbuf_mtt); + } else { + dma_free_coherent(&dev->pdev->dev, + WARPPED_BUFSIZE(depth << CQE_SHIFT), + cq->kern_cq.qbuf, cq->kern_cq.qbuf_dma_addr); + } + +err_out_xa: + xa_erase(&dev->cq_xa, cq->cqn); + + return ret; +} + +void erdma_port_event(struct erdma_dev *dev, enum ib_event_type reason) +{ + struct ib_event event; + + event.device = &dev->ibdev; + event.element.port_num = 1; + event.event = reason; + + ib_dispatch_event(&event); +}