From: Cheng Xu <chengyou@xxxxxxxxxxxxxxxxx>
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 reset
is in erdma_verbs.c.
Signed-off-by: Cheng Xu <chengyou@xxxxxxxxxxxxxxxxx>
---
drivers/infiniband/hw/erdma/erdma_cq.c | 202 +++
drivers/infiniband/hw/erdma/erdma_qp.c | 567 ++++++++
drivers/infiniband/hw/erdma/erdma_verbs.c | 1447 +++++++++++++++++++++
3 files changed, 2216 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..318c87563ba4
--- /dev/null
+++ b/drivers/infiniband/hw/erdma/erdma_cq.c
@@ -0,0 +1,202 @@
+// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
+
+/* Authors: Cheng Xu <chengyou@xxxxxxxxxxxxxxxxx> */
+/* Kai Shen <kaishen@xxxxxxxxxxxxxxxxx> */
+/* Copyright (c) 2020-2022, Alibaba Group. */
+
+#include <rdma/ib_verbs.h>
+
+#include "erdma_hw.h"
+#include "erdma_verbs.h"
+
+static int erdma_cq_notempty(struct erdma_cq *cq)
+{
+ struct erdma_cqe *cqe;
+ unsigned long flags;
+ u32 hdr;
+
+ spin_lock_irqsave(&cq->kern_cq.lock, flags);
+
+ cqe = &cq->kern_cq.qbuf[cq->kern_cq.ci & (cq->depth - 1)];
+ hdr = be32_to_cpu(READ_ONCE(cqe->hdr));
+ if (FIELD_GET(ERDMA_CQE_HDR_OWNER_MASK, hdr) != cq->kern_cq.owner) {
+ spin_unlock_irqrestore(&cq->kern_cq.lock, flags);
+ return 0;
+ }
+
+ spin_unlock_irqrestore(&cq->kern_cq.lock, flags);
+ return 1;
+}
+
+static void notify_cq(struct erdma_cq *cq, u8 solcitied)
+{
+ u64 db_data = FIELD_PREP(ERDMA_CQDB_EQN_MASK, cq->assoc_eqn) |
+ 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);
+ int ret = 0;
+
+ notify_cq(cq, (flags & IB_CQ_SOLICITED_MASK) == IB_CQ_SOLICITED);
+
+ if (flags & IB_CQ_REPORT_MISSED_EVENTS)
+ ret = erdma_cq_notempty(cq);
+
+ 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_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 },
+};
+
+static int erdma_poll_one_cqe(struct erdma_cq *cq, struct erdma_cqe *cqe,
+ struct ib_wc *wc)
+{
+ struct erdma_dev *dev = to_edev(cq->ibcq.device);
+ struct erdma_qp *qp;
+ struct erdma_kqp *kern_qp;
+ u64 *wqe_hdr;
+ u64 *id_table;
+ u32 qpn = be32_to_cpu(cqe->qpn);
+ u16 wqe_idx = be32_to_cpu(cqe->qe_idx);
+ u32 hdr = be32_to_cpu(cqe->hdr);
+ u16 depth;
+ u8 opcode, syndrome, qtype;
+
+ qp = find_qp_by_qpn(dev, qpn);
+ kern_qp = &qp->kern_qp;
+
+ qtype = FIELD_GET(ERDMA_CQE_HDR_QTYPE_MASK, hdr);
+ syndrome = FIELD_GET(ERDMA_CQE_HDR_SYNDROME_MASK, hdr);
+ opcode = FIELD_GET(ERDMA_CQE_HDR_OPCODE_MASK, hdr);
+
+ if (qtype == ERDMA_CQE_QTYPE_SQ) {
+ id_table = kern_qp->swr_tbl;
+ depth = qp->attrs.sq_size;
+ wqe_hdr = (u64 *)get_sq_entry(qp, wqe_idx);
+ 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 (wc->opcode == IB_WC_RECV_RDMA_WITH_IMM) {
+ wc->ex.imm_data = be32_to_cpu(cqe->imm_data);
+ wc->wc_flags |= IB_WC_WITH_IMM;
+ }
+
+ 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);
+ struct erdma_cqe *cqe;
+ unsigned long flags;
+ u32 owner;
+ u32 ci;
+ int i, ret;
+ int new = 0;
+ u32 hdr;
+
+ spin_lock_irqsave(&cq->kern_cq.lock, flags);
+
+ owner = cq->kern_cq.owner;
+ ci = cq->kern_cq.ci;
+
+ for (i = 0; i < num_entries; i++) {
+ cqe = &cq->kern_cq.qbuf[ci & (cq->depth - 1)];
+
+ hdr = be32_to_cpu(READ_ONCE(cqe->hdr));
+ if (FIELD_GET(ERDMA_CQE_HDR_OWNER_MASK, hdr) != owner)
+ break;
+
+ /* cqbuf should be ready when we poll*/
+ dma_rmb();
+ ret = erdma_poll_one_cqe(cq, cqe, wc);
+ ci++;
+ if ((ci & (cq->depth - 1)) == 0)
+ owner = !owner;
+ if (ret)
+ continue;
+ wc++;
+ new++;
+ }
+ cq->kern_cq.owner = owner;
+ cq->kern_cq.ci = ci;
+
+ spin_unlock_irqrestore(&cq->kern_cq.lock, flags);
+ return new;
+}
diff --git a/drivers/infiniband/hw/erdma/erdma_qp.c b/drivers/infiniband/hw/erdma/erdma_qp.c
new file mode 100644
index 000000000000..0305980b5a80
--- /dev/null
+++ b/drivers/infiniband/hw/erdma/erdma_qp.c
@@ -0,0 +1,567 @@
+// SPDX-License-Identifier: GPL-2.0 or BSD-3-Clause
+
+/* Authors: Cheng Xu <chengyou@xxxxxxxxxxxxxxxxx> */
+/* Kai Shen <kaishen@xxxxxxxxxxxxxxxxx> */
+/* Copyright (c) 2020-2021, Alibaba Group */
+/* Authors: Bernard Metzler <bmt@xxxxxxxxxxxxxx> */
+/* Copyright (c) 2008-2019, IBM Corporation */
+
+#include <linux/errno.h>
+#include <linux/pci.h>
+#include <linux/scatterlist.h>
+#include <linux/types.h>
+
+#include <rdma/iw_cm.h>
+#include <rdma/ib_user_verbs.h>
+#include <rdma/ib_verbs.h>
+
+#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 (struct ib_qp *)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.cfg0 = FIELD_PREP(ERDMA_CMD_MODIFY_QP_STATE_MASK, qp->attrs.state) |
+ FIELD_PREP(ERDMA_CMD_MODIFY_QP_CC_MASK, qp->cc_method) |
+ 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->qp_type == ERDMA_QP_PASSIVE)
+ req.send_nxt += MPA_DEFAULT_HDR_LEN + qp->private_data_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.cfg0 = 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 = 0, 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:
+ 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;
+ }
+ 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;
+ }
+
+ if (drop_conn)
+ erdma_qp_cm_drop(qp);
+
+ 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 wqebb_idx,
+ u32 sgl_offset, u32 *length_field)
+{
+ int i = 0;
+ char *data;
+ u32 remain_size, copy_size, data_off, bytes = 0;
+
+ wqebb_idx += (sgl_offset >> SQEBB_SHIFT);
+ sgl_offset &= (SQEBB_SIZE - 1);
+ data = get_sq_entry(qp, wqebb_idx);
+
+ 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;
+ wqebb_idx += (sgl_offset >> SQEBB_SHIFT);
+ sgl_offset &= (SQEBB_SIZE - 1);
+
+ data = get_sq_entry(qp, wqebb_idx);
+ 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 wqebb_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) {
+ wqebb_idx += (sgl_offset >> SQEBB_SHIFT);
+ sgl_offset &= (SQEBB_SIZE - 1);
+ sgl = get_sq_entry(qp, wqebb_idx);
+
+ 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)
+{
+ struct erdma_write_sqe *write_sqe;
+ struct erdma_send_sqe *send_sqe;
+ struct erdma_readreq_sqe *read_sqe;
+ struct erdma_reg_mr_sqe *regmr_sge;
+ struct erdma_mr *mr;
+ struct ib_rdma_wr *rdma_wr;
+ struct ib_sge *sge;
+ u32 wqe_size, wqebb_cnt, hw_op;
+ int ret;
+ u32 flags = send_wr->send_flags;
+ u32 idx = *pi & (qp->attrs.sq_size - 1);
+ u64 *entry = (u64 *)get_sq_entry(qp, idx);
+ u64 wqe_hdr;
+ u32 *length_field = NULL;
+ u64 sgl_offset = 0;
+ enum ib_wr_opcode op = send_wr->opcode;
+ u64 *inline_data;
+
+ *entry = 0;
+ qp->kern_qp.swr_tbl[idx] = send_wr->wr_id;
+
+ 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_high = upper_32_bits(rdma_wr->remote_addr);
+ write_sqe->sink_to_low = 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:
+ 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 = (struct erdma_readreq_sqe *)entry;
+ read_sqe->length = send_wr->sg_list[0].length;
+ read_sqe->sink_stag = send_wr->sg_list[0].lkey;
+ read_sqe->sink_to_low =
+ lower_32_bits(send_wr->sg_list[0].addr);
+ read_sqe->sink_to_high =
+ upper_32_bits(send_wr->sg_list[0].addr);
+
+ sge = (struct ib_sge *)get_sq_entry(qp, idx + 1);
+ 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:
+ 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);
+ send_sqe = (struct erdma_send_sqe *)entry;
+ 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 |
+ (reg_wr(send_wr)->access & IB_ACCESS_REMOTE_READ ?
+ ERDMA_MR_ACC_RR : 0) |
+ (reg_wr(send_wr)->access & IB_ACCESS_LOCAL_WRITE ?
+ ERDMA_MR_ACC_LW : 0) |
+ (reg_wr(send_wr)->access & IB_ACCESS_REMOTE_WRITE ?
+ ERDMA_MR_ACC_RW : 0);
+ 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_ACCESS_MODE_MASK, 0);
+ regmr_sge->attrs |=
+ FIELD_PREP(ERDMA_SQE_MR_ACCESS_RIGHT_MASK, mr->access);
+ regmr_sge->attrs |= FIELD_PREP(ERDMA_SQE_MR_MTT_COUNT_MASK,
+ mr->mem.mtt_nents);
+
+ if (mr->mem.mtt_nents < 4) {
+ regmr_sge->attrs |=
+ FIELD_PREP(ERDMA_SQE_MR_MTT_TYPE_MASK, 0);
+ inline_data = (u64 *)get_sq_entry(qp, idx + 1);
+ memcpy(inline_data, mr->mem.mtt_buf,
+ mr->mem.mtt_nents * 8);
+ wqe_size = sizeof(struct erdma_reg_mr_sqe) +
+ mr->mem.mtt_nents * 8;
+ } 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 ib_qp *ibqp,
+ const struct ib_recv_wr *recv_wr,
+ const struct ib_recv_wr **bad_recv_wr)
+{
+ struct erdma_qp *qp = to_eqp(ibqp);
+ 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 *qp, const struct ib_recv_wr *recv_wr,
+ const struct ib_recv_wr **bad_recv_wr)
+{
+ struct erdma_qp *eqp = to_eqp(qp);
+ int ret = 0;
+ const struct ib_recv_wr *wr = recv_wr;
+ unsigned long flags;
+
+ if (!qp || !recv_wr)
+ return -EINVAL;
+
+ spin_lock_irqsave(&eqp->lock, flags);
+ while (wr) {
+ ret = erdma_post_recv_one(qp, wr, bad_recv_wr);
+ if (ret) {
+ *bad_recv_wr = wr;
+ break;
+ }
+ wr = wr->next;
+ }
+ spin_unlock_irqrestore(&eqp->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..28606cb68ce0
--- /dev/null
+++ b/drivers/infiniband/hw/erdma/erdma_verbs.c
@@ -0,0 +1,1447 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/* Authors: Cheng Xu <chengyou@xxxxxxxxxxxxxxxxx> */
+/* Kai Shen <kaishen@xxxxxxxxxxxxxxxxx> */
+/* Copyright (c) 2020-2022, Alibaba Group. */
+
+/* Authors: Bernard Metzler <bmt@xxxxxxxxxxxxxx> */
+/* Copyright (c) 2008-2019, IBM Corporation */
+
+/* Copyright (c) 2013-2015, Mellanox Technologies. All rights reserved. */
+
+#include <linux/errno.h>
+#include <linux/pci.h>
+#include <linux/types.h>
+#include <linux/uaccess.h>
+#include <linux/vmalloc.h>
+#include <net/addrconf.h>
+#include <rdma/erdma-abi.h>
+#include <rdma/iw_cm.h>
+#include <rdma/ib_verbs.h>
+#include <rdma/ib_smi.h>
+#include <rdma/ib_umem.h>
+#include <rdma/ib_user_verbs.h>
+#include <rdma/uverbs_ioctl.h>
+
+#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;
+
+ 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 +
+ (SQEBB_SHIFT << qp->attrs.sq_size);
+ req.rq_db_info_dma_addr = qp->kern_qp.rq_buf_dma_addr +
+ (RQE_SHIFT << qp->attrs.rq_size);
+ } 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);
+
+ if (user_qp->sq_mtt.mtt_nents == 1)
+ req.sq_buf_addr = *(u64 *)user_qp->sq_mtt.mtt_buf;
+ else
+ req.sq_buf_addr = user_qp->sq_mtt.mtt_entry[0];
+
+ if (user_qp->rq_mtt.mtt_nents == 1)
+ req.rq_buf_addr = *(u64 *)user_qp->rq_mtt.mtt_buf;
+ else
+ 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;
+ }
+
+ return erdma_post_cmd_wait(&dev->cmdq, (u64 *)&req, sizeof(req), NULL,
+ NULL);
+}
+
+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 = dev->attrs.vendor_id;
+ attr->vendor_part_id = 0;
+ 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 = dev->attrs.cap_flags;
+ 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_srq = dev->attrs.max_srq;
+ attr->max_srq_wr = dev->attrs.max_srq_wr;
+ attr->max_srq_sge = dev->attrs.max_srq_sge;
+ attr->max_fast_reg_page_list_len = ERDMA_MAX_FRMR_PA;
+ attr->page_size_cap = ERDMA_PAGE_SIZE_SUPPORT;
+
+ 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);
+ int ret = 0;
+
+ memset(attr, 0, sizeof(*attr));
+
+ attr->state = dev->state;
+ if (dev->netdev) {
+ ret = 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 ret;
+}
+
+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 ret = -ENOMEM;
+ 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));
+
+ 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 ret;
+}
+
+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->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->umem) {
+ ib_umem_release(mem->umem);
+ mem->umem = NULL;
+ }
+
+ 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));
+ }
+}
+
+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)
+{
+ int ret;
+ dma_addr_t db_info_dma_addr;
+ u32 rq_offset;
+
+ 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)
+ goto err_out;
+
+ 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 err_out;
+
+ ret = erdma_map_user_dbrecords(uctx, db_info_va,
+ &qp->user_qp.user_dbr_page,
+ &db_info_dma_addr);
+ if (ret)
+ goto err_out;
+
+ qp->user_qp.sq_db_info_dma_addr = db_info_dma_addr;
+ qp->user_qp.rq_db_info_dma_addr = db_info_dma_addr + 8;
+
+ return 0;
+
+err_out:
+ 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->cc_method = dev->attrs.cc_method;
+
+ 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;
+
+ init_user_qp(qp, uctx, ureq.qbuf_va, ureq.qbuf_len,
+ ureq.db_record_va);
+
+ 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_xa;
+ } 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 (rdma_is_kernel_res(&qp->ibqp.res))
+ free_kernel_qp(qp);
+ else
+ free_user_qp(qp, uctx);
+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;
+ u32 key = 0;
+
+ stag_idx = erdma_alloc_idx(&dev->res_cb[ERDMA_RES_TYPE_STAG_IDX]);
+ if (stag_idx < 0)
+ return stag_idx;
+
+ *stag = (stag_idx << 8) | (key & 0xFF);
+
+ 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 |
+ (acc & IB_ACCESS_REMOTE_READ ? ERDMA_MR_ACC_RR : 0) |
+ (acc & IB_ACCESS_LOCAL_WRITE ? ERDMA_MR_ACC_LW : 0) |
+ (acc & IB_ACCESS_REMOTE_WRITE ? ERDMA_MR_ACC_RW : 0);
+ 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 |
+ (access & IB_ACCESS_REMOTE_READ ? ERDMA_MR_ACC_RR : 0) |
+ (access & IB_ACCESS_LOCAL_WRITE ? ERDMA_MR_ACC_LW : 0) |
+ (access & IB_ACCESS_REMOTE_WRITE ? ERDMA_MR_ACC_RW : 0);
+ 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.cfg0 = 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);
+
+ erdma_qp_put(qp);
+ wait_for_completion(&qp->safe_free);
+
+ err = erdma_post_cmd_wait(&dev->cmdq, (u64 *)&req, sizeof(req), NULL,
+ NULL);
+ if (err) {
+ up_write(&qp->state_lock);
+ return err;
+ }
+
+ 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;
+}
+
+#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 + (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 = ERDMA_DWQE_TYPE0_CNT +
+ 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 + (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);
+ ctx->dev = dev;
+
+ 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->attrs.vendor_part_id;
+ 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 = ctx->dev;
+
+ 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(&ctx->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;
+}
+
+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 (udata) {
+ 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 = 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)
+ goto err_out_xa;
+
+ 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);
+ 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) {
+ erdma_unmap_user_dbrecords(ctx,
+ &cq->user_cq.user_dbr_page);
+ put_mtt_entries(dev, &cq->user_cq.qbuf_mtt);
+ goto err_out_xa;
+ }
+ } else {
+ cq->kern_cq.owner = 1;
+
+ cq->kern_cq.qbuf = dma_alloc_coherent(
+ &dev->pdev->dev, WARPPED_BUFSIZE(depth << CQE_SHIFT),
+ &cq->kern_cq.qbuf_dma_addr, GFP_KERNEL);
+ if (!cq->kern_cq.qbuf) {
+ ret = -ENOMEM;
+ goto err_out_xa;
+ }
+
+ cq->kern_cq.db_record =
+ (u64 *)(cq->kern_cq.qbuf + (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;
+ }
+
+ ret = create_cq_cmd(dev, cq);
+ if (ret)
+ goto err_free_res;
+
+ return 0;
+
+err_free_res:
+ if (udata) {
+ 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;
+}
+
+struct net_device *erdma_get_netdev(struct ib_device *device, u32 port_num)
+{
+ struct erdma_dev *dev = to_edev(device);
+
+ if (dev->netdev)
+ dev_hold(dev->netdev);
+
+ return dev->netdev;
+}
+
+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);
+}
--
2.27.0
