/* * Copyright (c) 2013, Mellanox Technologies inc. All rights reserved. * * This software is available to you under a choice of one of two * licenses. You may choose to be licensed under the terms of the GNU * General Public License (GPL) Version 2, available from the file * COPYING in the main directory of this source tree, or the * OpenIB.org BSD license below: * * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the following * conditions are met: * * - Redistributions of source code must retain the above * copyright notice, this list of conditions and the following * disclaimer. * * - Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the following * disclaimer in the documentation and/or other materials * provided with the distribution. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #include #include #include "mlx5_ib.h" #include "user.h" /* not supported currently */ static int wq_signature; enum { MLX5_IB_ACK_REQ_FREQ = 8, }; enum { MLX5_IB_DEFAULT_SCHED_QUEUE = 0x83, MLX5_IB_DEFAULT_QP0_SCHED_QUEUE = 0x3f, MLX5_IB_LINK_TYPE_IB = 0, MLX5_IB_LINK_TYPE_ETH = 1 }; enum { MLX5_IB_SQ_STRIDE = 6, MLX5_IB_CACHE_LINE_SIZE = 64, }; static const u32 mlx5_ib_opcode[] = { [IB_WR_SEND] = MLX5_OPCODE_SEND, [IB_WR_SEND_WITH_IMM] = MLX5_OPCODE_SEND_IMM, [IB_WR_RDMA_WRITE] = MLX5_OPCODE_RDMA_WRITE, [IB_WR_RDMA_WRITE_WITH_IMM] = MLX5_OPCODE_RDMA_WRITE_IMM, [IB_WR_RDMA_READ] = MLX5_OPCODE_RDMA_READ, [IB_WR_ATOMIC_CMP_AND_SWP] = MLX5_OPCODE_ATOMIC_CS, [IB_WR_ATOMIC_FETCH_AND_ADD] = MLX5_OPCODE_ATOMIC_FA, [IB_WR_SEND_WITH_INV] = MLX5_OPCODE_SEND_INVAL, [IB_WR_LOCAL_INV] = MLX5_OPCODE_UMR, [IB_WR_FAST_REG_MR] = MLX5_OPCODE_UMR, [IB_WR_MASKED_ATOMIC_CMP_AND_SWP] = MLX5_OPCODE_ATOMIC_MASKED_CS, [IB_WR_MASKED_ATOMIC_FETCH_AND_ADD] = MLX5_OPCODE_ATOMIC_MASKED_FA, [MLX5_IB_WR_UMR] = MLX5_OPCODE_UMR, }; struct umr_wr { u64 virt_addr; struct ib_pd *pd; unsigned int page_shift; unsigned int npages; u32 length; int access_flags; u32 mkey; }; static int is_qp0(enum ib_qp_type qp_type) { return qp_type == IB_QPT_SMI; } static int is_qp1(enum ib_qp_type qp_type) { return qp_type == IB_QPT_GSI; } static int is_sqp(enum ib_qp_type qp_type) { return is_qp0(qp_type) || is_qp1(qp_type); } static void *get_wqe(struct mlx5_ib_qp *qp, int offset) { return mlx5_buf_offset(&qp->buf, offset); } static void *get_recv_wqe(struct mlx5_ib_qp *qp, int n) { return get_wqe(qp, qp->rq.offset + (n << qp->rq.wqe_shift)); } void *mlx5_get_send_wqe(struct mlx5_ib_qp *qp, int n) { return get_wqe(qp, qp->sq.offset + (n << MLX5_IB_SQ_STRIDE)); } static void mlx5_ib_qp_event(struct mlx5_core_qp *qp, int type) { struct ib_qp *ibqp = &to_mibqp(qp)->ibqp; struct ib_event event; if (type == MLX5_EVENT_TYPE_PATH_MIG) to_mibqp(qp)->port = to_mibqp(qp)->alt_port; if (ibqp->event_handler) { event.device = ibqp->device; event.element.qp = ibqp; switch (type) { case MLX5_EVENT_TYPE_PATH_MIG: event.event = IB_EVENT_PATH_MIG; break; case MLX5_EVENT_TYPE_COMM_EST: event.event = IB_EVENT_COMM_EST; break; case MLX5_EVENT_TYPE_SQ_DRAINED: event.event = IB_EVENT_SQ_DRAINED; break; case MLX5_EVENT_TYPE_SRQ_LAST_WQE: event.event = IB_EVENT_QP_LAST_WQE_REACHED; break; case MLX5_EVENT_TYPE_WQ_CATAS_ERROR: event.event = IB_EVENT_QP_FATAL; break; case MLX5_EVENT_TYPE_PATH_MIG_FAILED: event.event = IB_EVENT_PATH_MIG_ERR; break; case MLX5_EVENT_TYPE_WQ_INVAL_REQ_ERROR: event.event = IB_EVENT_QP_REQ_ERR; break; case MLX5_EVENT_TYPE_WQ_ACCESS_ERROR: event.event = IB_EVENT_QP_ACCESS_ERR; break; default: pr_warn("mlx5_ib: Unexpected event type %d on QP %06x\n", type, qp->qpn); return; } ibqp->event_handler(&event, ibqp->qp_context); } } static int set_rq_size(struct mlx5_ib_dev *dev, struct ib_qp_cap *cap, int has_rq, struct mlx5_ib_qp *qp, struct mlx5_ib_create_qp *ucmd) { int wqe_size; int wq_size; /* Sanity check RQ size before proceeding */ if (cap->max_recv_wr > dev->mdev.caps.max_wqes) return -EINVAL; if (!has_rq) { qp->rq.max_gs = 0; qp->rq.wqe_cnt = 0; qp->rq.wqe_shift = 0; } else { if (ucmd) { qp->rq.wqe_cnt = ucmd->rq_wqe_count; qp->rq.wqe_shift = ucmd->rq_wqe_shift; qp->rq.max_gs = (1 << qp->rq.wqe_shift) / sizeof(struct mlx5_wqe_data_seg) - qp->wq_sig; qp->rq.max_post = qp->rq.wqe_cnt; } else { wqe_size = qp->wq_sig ? sizeof(struct mlx5_wqe_signature_seg) : 0; wqe_size += cap->max_recv_sge * sizeof(struct mlx5_wqe_data_seg); wqe_size = roundup_pow_of_two(wqe_size); wq_size = roundup_pow_of_two(cap->max_recv_wr) * wqe_size; wq_size = max_t(int, wq_size, MLX5_SEND_WQE_BB); qp->rq.wqe_cnt = wq_size / wqe_size; if (wqe_size > dev->mdev.caps.max_rq_desc_sz) { mlx5_ib_dbg(dev, "wqe_size %d, max %d\n", wqe_size, dev->mdev.caps.max_rq_desc_sz); return -EINVAL; } qp->rq.wqe_shift = ilog2(wqe_size); qp->rq.max_gs = (1 << qp->rq.wqe_shift) / sizeof(struct mlx5_wqe_data_seg) - qp->wq_sig; qp->rq.max_post = qp->rq.wqe_cnt; } } return 0; } static int sq_overhead(enum ib_qp_type qp_type) { int size = 0; switch (qp_type) { case IB_QPT_XRC_INI: size += sizeof(struct mlx5_wqe_xrc_seg); /* fall through */ case IB_QPT_RC: size += sizeof(struct mlx5_wqe_ctrl_seg) + sizeof(struct mlx5_wqe_atomic_seg) + sizeof(struct mlx5_wqe_raddr_seg); break; case IB_QPT_XRC_TGT: return 0; case IB_QPT_UC: size += sizeof(struct mlx5_wqe_ctrl_seg) + sizeof(struct mlx5_wqe_raddr_seg); break; case IB_QPT_UD: case IB_QPT_SMI: case IB_QPT_GSI: size += sizeof(struct mlx5_wqe_ctrl_seg) + sizeof(struct mlx5_wqe_datagram_seg); break; case MLX5_IB_QPT_REG_UMR: size += sizeof(struct mlx5_wqe_ctrl_seg) + sizeof(struct mlx5_wqe_umr_ctrl_seg) + sizeof(struct mlx5_mkey_seg); break; default: return -EINVAL; } return size; } static int calc_send_wqe(struct ib_qp_init_attr *attr) { int inl_size = 0; int size; size = sq_overhead(attr->qp_type); if (size < 0) return size; if (attr->cap.max_inline_data) { inl_size = size + sizeof(struct mlx5_wqe_inline_seg) + attr->cap.max_inline_data; } size += attr->cap.max_send_sge * sizeof(struct mlx5_wqe_data_seg); return ALIGN(max_t(int, inl_size, size), MLX5_SEND_WQE_BB); } static int calc_sq_size(struct mlx5_ib_dev *dev, struct ib_qp_init_attr *attr, struct mlx5_ib_qp *qp) { int wqe_size; int wq_size; if (!attr->cap.max_send_wr) return 0; wqe_size = calc_send_wqe(attr); mlx5_ib_dbg(dev, "wqe_size %d\n", wqe_size); if (wqe_size < 0) return wqe_size; if (wqe_size > dev->mdev.caps.max_sq_desc_sz) { mlx5_ib_dbg(dev, "wqe_size(%d) > max_sq_desc_sz(%d)\n", wqe_size, dev->mdev.caps.max_sq_desc_sz); return -EINVAL; } qp->max_inline_data = wqe_size - sq_overhead(attr->qp_type) - sizeof(struct mlx5_wqe_inline_seg); attr->cap.max_inline_data = qp->max_inline_data; wq_size = roundup_pow_of_two(attr->cap.max_send_wr * wqe_size); qp->sq.wqe_cnt = wq_size / MLX5_SEND_WQE_BB; if (qp->sq.wqe_cnt > dev->mdev.caps.max_wqes) { mlx5_ib_dbg(dev, "wqe count(%d) exceeds limits(%d)\n", qp->sq.wqe_cnt, dev->mdev.caps.max_wqes); return -ENOMEM; } qp->sq.wqe_shift = ilog2(MLX5_SEND_WQE_BB); qp->sq.max_gs = attr->cap.max_send_sge; qp->sq.max_post = wq_size / wqe_size; attr->cap.max_send_wr = qp->sq.max_post; return wq_size; } static int set_user_buf_size(struct mlx5_ib_dev *dev, struct mlx5_ib_qp *qp, struct mlx5_ib_create_qp *ucmd) { int desc_sz = 1 << qp->sq.wqe_shift; if (desc_sz > dev->mdev.caps.max_sq_desc_sz) { mlx5_ib_warn(dev, "desc_sz %d, max_sq_desc_sz %d\n", desc_sz, dev->mdev.caps.max_sq_desc_sz); return -EINVAL; } if (ucmd->sq_wqe_count && ((1 << ilog2(ucmd->sq_wqe_count)) != ucmd->sq_wqe_count)) { mlx5_ib_warn(dev, "sq_wqe_count %d, sq_wqe_count %d\n", ucmd->sq_wqe_count, ucmd->sq_wqe_count); return -EINVAL; } qp->sq.wqe_cnt = ucmd->sq_wqe_count; if (qp->sq.wqe_cnt > dev->mdev.caps.max_wqes) { mlx5_ib_warn(dev, "wqe_cnt %d, max_wqes %d\n", qp->sq.wqe_cnt, dev->mdev.caps.max_wqes); return -EINVAL; } qp->buf_size = (qp->rq.wqe_cnt << qp->rq.wqe_shift) + (qp->sq.wqe_cnt << 6); return 0; } static int qp_has_rq(struct ib_qp_init_attr *attr) { if (attr->qp_type == IB_QPT_XRC_INI || attr->qp_type == IB_QPT_XRC_TGT || attr->srq || attr->qp_type == MLX5_IB_QPT_REG_UMR || !attr->cap.max_recv_wr) return 0; return 1; } static int alloc_high_class_uuar(struct mlx5_uuar_info *uuari) { int nuuars = uuari->num_uars * MLX5_BF_REGS_PER_PAGE; int start_uuar; int i; start_uuar = nuuars - uuari->num_low_latency_uuars; for (i = start_uuar; i < nuuars; i++) { if (!test_bit(i, uuari->bitmap)) { set_bit(i, uuari->bitmap); uuari->count[i]++; return i; } } return -ENOMEM; } static int alloc_med_class_uuar(struct mlx5_uuar_info *uuari) { int nuuars = uuari->num_uars * MLX5_BF_REGS_PER_PAGE; int minidx = 1; int uuarn; int end; int i; end = nuuars - uuari->num_low_latency_uuars; for (i = 1; i < end; i++) { uuarn = i & 3; if (uuarn == 2 || uuarn == 3) continue; if (uuari->count[i] < uuari->count[minidx]) minidx = i; } uuari->count[minidx]++; return minidx; } static int alloc_uuar(struct mlx5_uuar_info *uuari, enum mlx5_ib_latency_class lat) { int uuarn = -EINVAL; mutex_lock(&uuari->lock); switch (lat) { case MLX5_IB_LATENCY_CLASS_LOW: uuarn = 0; uuari->count[uuarn]++; break; case MLX5_IB_LATENCY_CLASS_MEDIUM: uuarn = alloc_med_class_uuar(uuari); break; case MLX5_IB_LATENCY_CLASS_HIGH: uuarn = alloc_high_class_uuar(uuari); break; case MLX5_IB_LATENCY_CLASS_FAST_PATH: uuarn = 2; break; } mutex_unlock(&uuari->lock); return uuarn; } static void free_med_class_uuar(struct mlx5_uuar_info *uuari, int uuarn) { clear_bit(uuarn, uuari->bitmap); --uuari->count[uuarn]; } static void free_high_class_uuar(struct mlx5_uuar_info *uuari, int uuarn) { clear_bit(uuarn, uuari->bitmap); --uuari->count[uuarn]; } static void free_uuar(struct mlx5_uuar_info *uuari, int uuarn) { int nuuars = uuari->num_uars * MLX5_BF_REGS_PER_PAGE; int high_uuar = nuuars - uuari->num_low_latency_uuars; mutex_lock(&uuari->lock); if (uuarn == 0) { --uuari->count[uuarn]; goto out; } if (uuarn < high_uuar) { free_med_class_uuar(uuari, uuarn); goto out; } free_high_class_uuar(uuari, uuarn); out: mutex_unlock(&uuari->lock); } static enum mlx5_qp_state to_mlx5_state(enum ib_qp_state state) { switch (state) { case IB_QPS_RESET: return MLX5_QP_STATE_RST; case IB_QPS_INIT: return MLX5_QP_STATE_INIT; case IB_QPS_RTR: return MLX5_QP_STATE_RTR; case IB_QPS_RTS: return MLX5_QP_STATE_RTS; case IB_QPS_SQD: return MLX5_QP_STATE_SQD; case IB_QPS_SQE: return MLX5_QP_STATE_SQER; case IB_QPS_ERR: return MLX5_QP_STATE_ERR; default: return -1; } } static int to_mlx5_st(enum ib_qp_type type) { switch (type) { case IB_QPT_RC: return MLX5_QP_ST_RC; case IB_QPT_UC: return MLX5_QP_ST_UC; case IB_QPT_UD: return MLX5_QP_ST_UD; case MLX5_IB_QPT_REG_UMR: return MLX5_QP_ST_REG_UMR; case IB_QPT_XRC_INI: case IB_QPT_XRC_TGT: return MLX5_QP_ST_XRC; case IB_QPT_SMI: return MLX5_QP_ST_QP0; case IB_QPT_GSI: return MLX5_QP_ST_QP1; case IB_QPT_RAW_IPV6: return MLX5_QP_ST_RAW_IPV6; case IB_QPT_RAW_ETHERTYPE: return MLX5_QP_ST_RAW_ETHERTYPE; case IB_QPT_RAW_PACKET: case IB_QPT_MAX: default: return -EINVAL; } } static int uuarn_to_uar_index(struct mlx5_uuar_info *uuari, int uuarn) { return uuari->uars[uuarn / MLX5_BF_REGS_PER_PAGE].index; } static int create_user_qp(struct mlx5_ib_dev *dev, struct ib_pd *pd, struct mlx5_ib_qp *qp, struct ib_udata *udata, struct mlx5_create_qp_mbox_in **in, struct mlx5_ib_create_qp_resp *resp, int *inlen) { struct mlx5_ib_ucontext *context; struct mlx5_ib_create_qp ucmd; int page_shift; int uar_index; int npages; u32 offset; int uuarn; int ncont; int err; err = ib_copy_from_udata(&ucmd, udata, sizeof(ucmd)); if (err) { mlx5_ib_dbg(dev, "copy failed\n"); return err; } context = to_mucontext(pd->uobject->context); /* * TBD: should come from the verbs when we have the API */ uuarn = alloc_uuar(&context->uuari, MLX5_IB_LATENCY_CLASS_HIGH); if (uuarn < 0) { mlx5_ib_dbg(dev, "failed to allocate low latency UUAR\n"); mlx5_ib_dbg(dev, "reverting to high latency\n"); uuarn = alloc_uuar(&context->uuari, MLX5_IB_LATENCY_CLASS_LOW); if (uuarn < 0) { mlx5_ib_dbg(dev, "uuar allocation failed\n"); return uuarn; } } uar_index = uuarn_to_uar_index(&context->uuari, uuarn); mlx5_ib_dbg(dev, "uuarn 0x%x, uar_index 0x%x\n", uuarn, uar_index); err = set_user_buf_size(dev, qp, &ucmd); if (err) goto err_uuar; qp->umem = ib_umem_get(pd->uobject->context, ucmd.buf_addr, qp->buf_size, 0, 0); if (IS_ERR(qp->umem)) { mlx5_ib_dbg(dev, "umem_get failed\n"); err = PTR_ERR(qp->umem); goto err_uuar; } mlx5_ib_cont_pages(qp->umem, ucmd.buf_addr, &npages, &page_shift, &ncont, NULL); err = mlx5_ib_get_buf_offset(ucmd.buf_addr, page_shift, &offset); if (err) { mlx5_ib_warn(dev, "bad offset\n"); goto err_umem; } mlx5_ib_dbg(dev, "addr 0x%llx, size %d, npages %d, page_shift %d, ncont %d, offset %d\n", ucmd.buf_addr, qp->buf_size, npages, page_shift, ncont, offset); *inlen = sizeof(**in) + sizeof(*(*in)->pas) * ncont; *in = mlx5_vzalloc(*inlen); if (!*in) { err = -ENOMEM; goto err_umem; } mlx5_ib_populate_pas(dev, qp->umem, page_shift, (*in)->pas, 0); (*in)->ctx.log_pg_sz_remote_qpn = cpu_to_be32((page_shift - PAGE_SHIFT) << 24); (*in)->ctx.params2 = cpu_to_be32(offset << 6); (*in)->ctx.qp_counter_set_usr_page = cpu_to_be32(uar_index); resp->uuar_index = uuarn; qp->uuarn = uuarn; err = mlx5_ib_db_map_user(context, ucmd.db_addr, &qp->db); if (err) { mlx5_ib_dbg(dev, "map failed\n"); goto err_free; } err = ib_copy_to_udata(udata, resp, sizeof(*resp)); if (err) { mlx5_ib_dbg(dev, "copy failed\n"); goto err_unmap; } qp->create_type = MLX5_QP_USER; return 0; err_unmap: mlx5_ib_db_unmap_user(context, &qp->db); err_free: mlx5_vfree(*in); err_umem: ib_umem_release(qp->umem); err_uuar: free_uuar(&context->uuari, uuarn); return err; } static void destroy_qp_user(struct ib_pd *pd, struct mlx5_ib_qp *qp) { struct mlx5_ib_ucontext *context; context = to_mucontext(pd->uobject->context); mlx5_ib_db_unmap_user(context, &qp->db); ib_umem_release(qp->umem); free_uuar(&context->uuari, qp->uuarn); } static int create_kernel_qp(struct mlx5_ib_dev *dev, struct ib_qp_init_attr *init_attr, struct mlx5_ib_qp *qp, struct mlx5_create_qp_mbox_in **in, int *inlen) { enum mlx5_ib_latency_class lc = MLX5_IB_LATENCY_CLASS_LOW; struct mlx5_uuar_info *uuari; int uar_index; int uuarn; int err; uuari = &dev->mdev.priv.uuari; if (init_attr->create_flags & IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK) qp->flags |= MLX5_IB_QP_BLOCK_MULTICAST_LOOPBACK; if (init_attr->qp_type == MLX5_IB_QPT_REG_UMR) lc = MLX5_IB_LATENCY_CLASS_FAST_PATH; uuarn = alloc_uuar(uuari, lc); if (uuarn < 0) { mlx5_ib_dbg(dev, "\n"); return -ENOMEM; } qp->bf = &uuari->bfs[uuarn]; uar_index = qp->bf->uar->index; err = calc_sq_size(dev, init_attr, qp); if (err < 0) { mlx5_ib_dbg(dev, "err %d\n", err); goto err_uuar; } qp->rq.offset = 0; qp->sq.offset = qp->rq.wqe_cnt << qp->rq.wqe_shift; qp->buf_size = err + (qp->rq.wqe_cnt << qp->rq.wqe_shift); err = mlx5_buf_alloc(&dev->mdev, qp->buf_size, PAGE_SIZE * 2, &qp->buf); if (err) { mlx5_ib_dbg(dev, "err %d\n", err); goto err_uuar; } qp->sq.qend = mlx5_get_send_wqe(qp, qp->sq.wqe_cnt); *inlen = sizeof(**in) + sizeof(*(*in)->pas) * qp->buf.npages; *in = mlx5_vzalloc(*inlen); if (!*in) { err = -ENOMEM; goto err_buf; } (*in)->ctx.qp_counter_set_usr_page = cpu_to_be32(uar_index); (*in)->ctx.log_pg_sz_remote_qpn = cpu_to_be32((qp->buf.page_shift - PAGE_SHIFT) << 24); /* Set "fast registration enabled" for all kernel QPs */ (*in)->ctx.params1 |= cpu_to_be32(1 << 11); (*in)->ctx.sq_crq_size |= cpu_to_be16(1 << 4); mlx5_fill_page_array(&qp->buf, (*in)->pas); err = mlx5_db_alloc(&dev->mdev, &qp->db); if (err) { mlx5_ib_dbg(dev, "err %d\n", err); goto err_free; } qp->db.db[0] = 0; qp->db.db[1] = 0; qp->sq.wrid = kmalloc(qp->sq.wqe_cnt * sizeof(*qp->sq.wrid), GFP_KERNEL); qp->sq.wr_data = kmalloc(qp->sq.wqe_cnt * sizeof(*qp->sq.wr_data), GFP_KERNEL); qp->rq.wrid = kmalloc(qp->rq.wqe_cnt * sizeof(*qp->rq.wrid), GFP_KERNEL); qp->sq.w_list = kmalloc(qp->sq.wqe_cnt * sizeof(*qp->sq.w_list), GFP_KERNEL); qp->sq.wqe_head = kmalloc(qp->sq.wqe_cnt * sizeof(*qp->sq.wqe_head), GFP_KERNEL); if (!qp->sq.wrid || !qp->sq.wr_data || !qp->rq.wrid || !qp->sq.w_list || !qp->sq.wqe_head) { err = -ENOMEM; goto err_wrid; } qp->create_type = MLX5_QP_KERNEL; return 0; err_wrid: mlx5_db_free(&dev->mdev, &qp->db); kfree(qp->sq.wqe_head); kfree(qp->sq.w_list); kfree(qp->sq.wrid); kfree(qp->sq.wr_data); kfree(qp->rq.wrid); err_free: mlx5_vfree(*in); err_buf: mlx5_buf_free(&dev->mdev, &qp->buf); err_uuar: free_uuar(&dev->mdev.priv.uuari, uuarn); return err; } static void destroy_qp_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_qp *qp) { mlx5_db_free(&dev->mdev, &qp->db); kfree(qp->sq.wqe_head); kfree(qp->sq.w_list); kfree(qp->sq.wrid); kfree(qp->sq.wr_data); kfree(qp->rq.wrid); mlx5_buf_free(&dev->mdev, &qp->buf); free_uuar(&dev->mdev.priv.uuari, qp->bf->uuarn); } static __be32 get_rx_type(struct mlx5_ib_qp *qp, struct ib_qp_init_attr *attr) { if (attr->srq || (attr->qp_type == IB_QPT_XRC_TGT) || (attr->qp_type == IB_QPT_XRC_INI)) return cpu_to_be32(MLX5_SRQ_RQ); else if (!qp->has_rq) return cpu_to_be32(MLX5_ZERO_LEN_RQ); else return cpu_to_be32(MLX5_NON_ZERO_RQ); } static int is_connected(enum ib_qp_type qp_type) { if (qp_type == IB_QPT_RC || qp_type == IB_QPT_UC) return 1; return 0; } static int create_qp_common(struct mlx5_ib_dev *dev, struct ib_pd *pd, struct ib_qp_init_attr *init_attr, struct ib_udata *udata, struct mlx5_ib_qp *qp) { struct mlx5_ib_resources *devr = &dev->devr; struct mlx5_ib_create_qp_resp resp; struct mlx5_create_qp_mbox_in *in; struct mlx5_ib_create_qp ucmd; int inlen = sizeof(*in); int err; mutex_init(&qp->mutex); spin_lock_init(&qp->sq.lock); spin_lock_init(&qp->rq.lock); if (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR) qp->sq_signal_bits = MLX5_WQE_CTRL_CQ_UPDATE; if (pd && pd->uobject) { if (ib_copy_from_udata(&ucmd, udata, sizeof(ucmd))) { mlx5_ib_dbg(dev, "copy failed\n"); return -EFAULT; } qp->wq_sig = !!(ucmd.flags & MLX5_QP_FLAG_SIGNATURE); qp->scat_cqe = !!(ucmd.flags & MLX5_QP_FLAG_SCATTER_CQE); } else { qp->wq_sig = !!wq_signature; } qp->has_rq = qp_has_rq(init_attr); err = set_rq_size(dev, &init_attr->cap, qp->has_rq, qp, (pd && pd->uobject) ? &ucmd : NULL); if (err) { mlx5_ib_dbg(dev, "err %d\n", err); return err; } if (pd) { if (pd->uobject) { mlx5_ib_dbg(dev, "requested sq_wqe_count (%d)\n", ucmd.sq_wqe_count); if (ucmd.rq_wqe_shift != qp->rq.wqe_shift || ucmd.rq_wqe_count != qp->rq.wqe_cnt) { mlx5_ib_dbg(dev, "invalid rq params\n"); return -EINVAL; } if (ucmd.sq_wqe_count > dev->mdev.caps.max_wqes) { mlx5_ib_dbg(dev, "requested sq_wqe_count (%d) > max allowed (%d)\n", ucmd.sq_wqe_count, dev->mdev.caps.max_wqes); return -EINVAL; } err = create_user_qp(dev, pd, qp, udata, &in, &resp, &inlen); if (err) mlx5_ib_dbg(dev, "err %d\n", err); } else { err = create_kernel_qp(dev, init_attr, qp, &in, &inlen); if (err) mlx5_ib_dbg(dev, "err %d\n", err); else qp->pa_lkey = to_mpd(pd)->pa_lkey; } if (err) return err; } else { in = mlx5_vzalloc(sizeof(*in)); if (!in) return -ENOMEM; qp->create_type = MLX5_QP_EMPTY; } if (is_sqp(init_attr->qp_type)) qp->port = init_attr->port_num; in->ctx.flags = cpu_to_be32(to_mlx5_st(init_attr->qp_type) << 16 | MLX5_QP_PM_MIGRATED << 11); if (init_attr->qp_type != MLX5_IB_QPT_REG_UMR) in->ctx.flags_pd = cpu_to_be32(to_mpd(pd ? pd : devr->p0)->pdn); else in->ctx.flags_pd = cpu_to_be32(MLX5_QP_LAT_SENSITIVE); if (qp->wq_sig) in->ctx.flags_pd |= cpu_to_be32(MLX5_QP_ENABLE_SIG); if (qp->scat_cqe && is_connected(init_attr->qp_type)) { int rcqe_sz; int scqe_sz; rcqe_sz = mlx5_ib_get_cqe_size(dev, init_attr->recv_cq); scqe_sz = mlx5_ib_get_cqe_size(dev, init_attr->send_cq); if (rcqe_sz == 128) in->ctx.cs_res = MLX5_RES_SCAT_DATA64_CQE; else in->ctx.cs_res = MLX5_RES_SCAT_DATA32_CQE; if (init_attr->sq_sig_type == IB_SIGNAL_ALL_WR) { if (scqe_sz == 128) in->ctx.cs_req = MLX5_REQ_SCAT_DATA64_CQE; else in->ctx.cs_req = MLX5_REQ_SCAT_DATA32_CQE; } } if (qp->rq.wqe_cnt) { in->ctx.rq_size_stride = (qp->rq.wqe_shift - 4); in->ctx.rq_size_stride |= ilog2(qp->rq.wqe_cnt) << 3; } in->ctx.rq_type_srqn = get_rx_type(qp, init_attr); if (qp->sq.wqe_cnt) in->ctx.sq_crq_size |= cpu_to_be16(ilog2(qp->sq.wqe_cnt) << 11); else in->ctx.sq_crq_size |= cpu_to_be16(0x8000); /* Set default resources */ switch (init_attr->qp_type) { case IB_QPT_XRC_TGT: in->ctx.cqn_recv = cpu_to_be32(to_mcq(devr->c0)->mcq.cqn); in->ctx.cqn_send = cpu_to_be32(to_mcq(devr->c0)->mcq.cqn); in->ctx.rq_type_srqn |= cpu_to_be32(to_msrq(devr->s0)->msrq.srqn); in->ctx.xrcd = cpu_to_be32(to_mxrcd(init_attr->xrcd)->xrcdn); break; case IB_QPT_XRC_INI: in->ctx.cqn_recv = cpu_to_be32(to_mcq(devr->c0)->mcq.cqn); in->ctx.xrcd = cpu_to_be32(to_mxrcd(devr->x1)->xrcdn); in->ctx.rq_type_srqn |= cpu_to_be32(to_msrq(devr->s0)->msrq.srqn); break; default: if (init_attr->srq) { in->ctx.xrcd = cpu_to_be32(to_mxrcd(devr->x0)->xrcdn); in->ctx.rq_type_srqn |= cpu_to_be32(to_msrq(init_attr->srq)->msrq.srqn); } else { in->ctx.xrcd = cpu_to_be32(to_mxrcd(devr->x1)->xrcdn); in->ctx.rq_type_srqn |= cpu_to_be32(to_msrq(devr->s0)->msrq.srqn); } } if (init_attr->send_cq) in->ctx.cqn_send = cpu_to_be32(to_mcq(init_attr->send_cq)->mcq.cqn); if (init_attr->recv_cq) in->ctx.cqn_recv = cpu_to_be32(to_mcq(init_attr->recv_cq)->mcq.cqn); in->ctx.db_rec_addr = cpu_to_be64(qp->db.dma); err = mlx5_core_create_qp(&dev->mdev, &qp->mqp, in, inlen); if (err) { mlx5_ib_dbg(dev, "create qp failed\n"); goto err_create; } mlx5_vfree(in); /* Hardware wants QPN written in big-endian order (after * shifting) for send doorbell. Precompute this value to save * a little bit when posting sends. */ qp->doorbell_qpn = swab32(qp->mqp.qpn << 8); qp->mqp.event = mlx5_ib_qp_event; return 0; err_create: if (qp->create_type == MLX5_QP_USER) destroy_qp_user(pd, qp); else if (qp->create_type == MLX5_QP_KERNEL) destroy_qp_kernel(dev, qp); mlx5_vfree(in); return err; } static void mlx5_ib_lock_cqs(struct mlx5_ib_cq *send_cq, struct mlx5_ib_cq *recv_cq) __acquires(&send_cq->lock) __acquires(&recv_cq->lock) { if (send_cq) { if (recv_cq) { if (send_cq->mcq.cqn < recv_cq->mcq.cqn) { spin_lock_irq(&send_cq->lock); spin_lock_nested(&recv_cq->lock, SINGLE_DEPTH_NESTING); } else if (send_cq->mcq.cqn == recv_cq->mcq.cqn) { spin_lock_irq(&send_cq->lock); __acquire(&recv_cq->lock); } else { spin_lock_irq(&recv_cq->lock); spin_lock_nested(&send_cq->lock, SINGLE_DEPTH_NESTING); } } else { spin_lock_irq(&send_cq->lock); } } else if (recv_cq) { spin_lock_irq(&recv_cq->lock); } } static void mlx5_ib_unlock_cqs(struct mlx5_ib_cq *send_cq, struct mlx5_ib_cq *recv_cq) __releases(&send_cq->lock) __releases(&recv_cq->lock) { if (send_cq) { if (recv_cq) { if (send_cq->mcq.cqn < recv_cq->mcq.cqn) { spin_unlock(&recv_cq->lock); spin_unlock_irq(&send_cq->lock); } else if (send_cq->mcq.cqn == recv_cq->mcq.cqn) { __release(&recv_cq->lock); spin_unlock_irq(&send_cq->lock); } else { spin_unlock(&send_cq->lock); spin_unlock_irq(&recv_cq->lock); } } else { spin_unlock_irq(&send_cq->lock); } } else if (recv_cq) { spin_unlock_irq(&recv_cq->lock); } } static struct mlx5_ib_pd *get_pd(struct mlx5_ib_qp *qp) { return to_mpd(qp->ibqp.pd); } static void get_cqs(struct mlx5_ib_qp *qp, struct mlx5_ib_cq **send_cq, struct mlx5_ib_cq **recv_cq) { switch (qp->ibqp.qp_type) { case IB_QPT_XRC_TGT: *send_cq = NULL; *recv_cq = NULL; break; case MLX5_IB_QPT_REG_UMR: case IB_QPT_XRC_INI: *send_cq = to_mcq(qp->ibqp.send_cq); *recv_cq = NULL; break; case IB_QPT_SMI: case IB_QPT_GSI: case IB_QPT_RC: case IB_QPT_UC: case IB_QPT_UD: case IB_QPT_RAW_IPV6: case IB_QPT_RAW_ETHERTYPE: *send_cq = to_mcq(qp->ibqp.send_cq); *recv_cq = to_mcq(qp->ibqp.recv_cq); break; case IB_QPT_RAW_PACKET: case IB_QPT_MAX: default: *send_cq = NULL; *recv_cq = NULL; break; } } static void destroy_qp_common(struct mlx5_ib_dev *dev, struct mlx5_ib_qp *qp) { struct mlx5_ib_cq *send_cq, *recv_cq; struct mlx5_modify_qp_mbox_in *in; int err; in = kzalloc(sizeof(*in), GFP_KERNEL); if (!in) return; if (qp->state != IB_QPS_RESET) if (mlx5_core_qp_modify(&dev->mdev, to_mlx5_state(qp->state), MLX5_QP_STATE_RST, in, sizeof(*in), &qp->mqp)) mlx5_ib_warn(dev, "mlx5_ib: modify QP %06x to RESET failed\n", qp->mqp.qpn); get_cqs(qp, &send_cq, &recv_cq); if (qp->create_type == MLX5_QP_KERNEL) { mlx5_ib_lock_cqs(send_cq, recv_cq); __mlx5_ib_cq_clean(recv_cq, qp->mqp.qpn, qp->ibqp.srq ? to_msrq(qp->ibqp.srq) : NULL); if (send_cq != recv_cq) __mlx5_ib_cq_clean(send_cq, qp->mqp.qpn, NULL); mlx5_ib_unlock_cqs(send_cq, recv_cq); } err = mlx5_core_destroy_qp(&dev->mdev, &qp->mqp); if (err) mlx5_ib_warn(dev, "failed to destroy QP 0x%x\n", qp->mqp.qpn); kfree(in); if (qp->create_type == MLX5_QP_KERNEL) destroy_qp_kernel(dev, qp); else if (qp->create_type == MLX5_QP_USER) destroy_qp_user(&get_pd(qp)->ibpd, qp); } static const char *ib_qp_type_str(enum ib_qp_type type) { switch (type) { case IB_QPT_SMI: return "IB_QPT_SMI"; case IB_QPT_GSI: return "IB_QPT_GSI"; case IB_QPT_RC: return "IB_QPT_RC"; case IB_QPT_UC: return "IB_QPT_UC"; case IB_QPT_UD: return "IB_QPT_UD"; case IB_QPT_RAW_IPV6: return "IB_QPT_RAW_IPV6"; case IB_QPT_RAW_ETHERTYPE: return "IB_QPT_RAW_ETHERTYPE"; case IB_QPT_XRC_INI: return "IB_QPT_XRC_INI"; case IB_QPT_XRC_TGT: return "IB_QPT_XRC_TGT"; case IB_QPT_RAW_PACKET: return "IB_QPT_RAW_PACKET"; case MLX5_IB_QPT_REG_UMR: return "MLX5_IB_QPT_REG_UMR"; case IB_QPT_MAX: default: return "Invalid QP type"; } } struct ib_qp *mlx5_ib_create_qp(struct ib_pd *pd, struct ib_qp_init_attr *init_attr, struct ib_udata *udata) { struct mlx5_ib_dev *dev; struct mlx5_ib_qp *qp; u16 xrcdn = 0; int err; if (pd) { dev = to_mdev(pd->device); } else { /* being cautious here */ if (init_attr->qp_type != IB_QPT_XRC_TGT && init_attr->qp_type != MLX5_IB_QPT_REG_UMR) { pr_warn("%s: no PD for transport %s\n", __func__, ib_qp_type_str(init_attr->qp_type)); return ERR_PTR(-EINVAL); } dev = to_mdev(to_mxrcd(init_attr->xrcd)->ibxrcd.device); } switch (init_attr->qp_type) { case IB_QPT_XRC_TGT: case IB_QPT_XRC_INI: if (!(dev->mdev.caps.flags & MLX5_DEV_CAP_FLAG_XRC)) { mlx5_ib_dbg(dev, "XRC not supported\n"); return ERR_PTR(-ENOSYS); } init_attr->recv_cq = NULL; if (init_attr->qp_type == IB_QPT_XRC_TGT) { xrcdn = to_mxrcd(init_attr->xrcd)->xrcdn; init_attr->send_cq = NULL; } /* fall through */ case IB_QPT_RC: case IB_QPT_UC: case IB_QPT_UD: case IB_QPT_SMI: case IB_QPT_GSI: case MLX5_IB_QPT_REG_UMR: qp = kzalloc(sizeof(*qp), GFP_KERNEL); if (!qp) return ERR_PTR(-ENOMEM); err = create_qp_common(dev, pd, init_attr, udata, qp); if (err) { mlx5_ib_dbg(dev, "create_qp_common failed\n"); kfree(qp); return ERR_PTR(err); } if (is_qp0(init_attr->qp_type)) qp->ibqp.qp_num = 0; else if (is_qp1(init_attr->qp_type)) qp->ibqp.qp_num = 1; else qp->ibqp.qp_num = qp->mqp.qpn; mlx5_ib_dbg(dev, "ib qpnum 0x%x, mlx qpn 0x%x, rcqn 0x%x, scqn 0x%x\n", qp->ibqp.qp_num, qp->mqp.qpn, to_mcq(init_attr->recv_cq)->mcq.cqn, to_mcq(init_attr->send_cq)->mcq.cqn); qp->xrcdn = xrcdn; break; case IB_QPT_RAW_IPV6: case IB_QPT_RAW_ETHERTYPE: case IB_QPT_RAW_PACKET: case IB_QPT_MAX: default: mlx5_ib_dbg(dev, "unsupported qp type %d\n", init_attr->qp_type); /* Don't support raw QPs */ return ERR_PTR(-EINVAL); } return &qp->ibqp; } int mlx5_ib_destroy_qp(struct ib_qp *qp) { struct mlx5_ib_dev *dev = to_mdev(qp->device); struct mlx5_ib_qp *mqp = to_mqp(qp); destroy_qp_common(dev, mqp); kfree(mqp); return 0; } static __be32 to_mlx5_access_flags(struct mlx5_ib_qp *qp, const struct ib_qp_attr *attr, int attr_mask) { u32 hw_access_flags = 0; u8 dest_rd_atomic; u32 access_flags; if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) dest_rd_atomic = attr->max_dest_rd_atomic; else dest_rd_atomic = qp->resp_depth; if (attr_mask & IB_QP_ACCESS_FLAGS) access_flags = attr->qp_access_flags; else access_flags = qp->atomic_rd_en; if (!dest_rd_atomic) access_flags &= IB_ACCESS_REMOTE_WRITE; if (access_flags & IB_ACCESS_REMOTE_READ) hw_access_flags |= MLX5_QP_BIT_RRE; if (access_flags & IB_ACCESS_REMOTE_ATOMIC) hw_access_flags |= (MLX5_QP_BIT_RAE | MLX5_ATOMIC_MODE_CX); if (access_flags & IB_ACCESS_REMOTE_WRITE) hw_access_flags |= MLX5_QP_BIT_RWE; return cpu_to_be32(hw_access_flags); } enum { MLX5_PATH_FLAG_FL = 1 << 0, MLX5_PATH_FLAG_FREE_AR = 1 << 1, MLX5_PATH_FLAG_COUNTER = 1 << 2, }; static int ib_rate_to_mlx5(struct mlx5_ib_dev *dev, u8 rate) { if (rate == IB_RATE_PORT_CURRENT) { return 0; } else if (rate < IB_RATE_2_5_GBPS || rate > IB_RATE_300_GBPS) { return -EINVAL; } else { while (rate != IB_RATE_2_5_GBPS && !(1 << (rate + MLX5_STAT_RATE_OFFSET) & dev->mdev.caps.stat_rate_support)) --rate; } return rate + MLX5_STAT_RATE_OFFSET; } static int mlx5_set_path(struct mlx5_ib_dev *dev, const struct ib_ah_attr *ah, struct mlx5_qp_path *path, u8 port, int attr_mask, u32 path_flags, const struct ib_qp_attr *attr) { int err; path->fl = (path_flags & MLX5_PATH_FLAG_FL) ? 0x80 : 0; path->free_ar = (path_flags & MLX5_PATH_FLAG_FREE_AR) ? 0x80 : 0; if (attr_mask & IB_QP_PKEY_INDEX) path->pkey_index = attr->pkey_index; path->grh_mlid = ah->src_path_bits & 0x7f; path->rlid = cpu_to_be16(ah->dlid); if (ah->ah_flags & IB_AH_GRH) { path->grh_mlid |= 1 << 7; path->mgid_index = ah->grh.sgid_index; path->hop_limit = ah->grh.hop_limit; path->tclass_flowlabel = cpu_to_be32((ah->grh.traffic_class << 20) | (ah->grh.flow_label)); memcpy(path->rgid, ah->grh.dgid.raw, 16); } err = ib_rate_to_mlx5(dev, ah->static_rate); if (err < 0) return err; path->static_rate = err; path->port = port; if (ah->ah_flags & IB_AH_GRH) { if (ah->grh.sgid_index >= dev->mdev.caps.port[port - 1].gid_table_len) { pr_err(KERN_ERR "sgid_index (%u) too large. max is %d\n", ah->grh.sgid_index, dev->mdev.caps.port[port - 1].gid_table_len); return -EINVAL; } path->grh_mlid |= 1 << 7; path->mgid_index = ah->grh.sgid_index; path->hop_limit = ah->grh.hop_limit; path->tclass_flowlabel = cpu_to_be32((ah->grh.traffic_class << 20) | (ah->grh.flow_label)); memcpy(path->rgid, ah->grh.dgid.raw, 16); } if (attr_mask & IB_QP_TIMEOUT) path->ackto_lt = attr->timeout << 3; path->sl = ah->sl & 0xf; return 0; } static enum mlx5_qp_optpar opt_mask[MLX5_QP_NUM_STATE][MLX5_QP_NUM_STATE][MLX5_QP_ST_MAX] = { [MLX5_QP_STATE_INIT] = { [MLX5_QP_STATE_INIT] = { [MLX5_QP_ST_RC] = MLX5_QP_OPTPAR_RRE | MLX5_QP_OPTPAR_RAE | MLX5_QP_OPTPAR_RWE | MLX5_QP_OPTPAR_PKEY_INDEX | MLX5_QP_OPTPAR_PRI_PORT, [MLX5_QP_ST_UC] = MLX5_QP_OPTPAR_RWE | MLX5_QP_OPTPAR_PKEY_INDEX | MLX5_QP_OPTPAR_PRI_PORT, [MLX5_QP_ST_UD] = MLX5_QP_OPTPAR_PKEY_INDEX | MLX5_QP_OPTPAR_Q_KEY | MLX5_QP_OPTPAR_PRI_PORT, }, [MLX5_QP_STATE_RTR] = { [MLX5_QP_ST_RC] = MLX5_QP_OPTPAR_ALT_ADDR_PATH | MLX5_QP_OPTPAR_RRE | MLX5_QP_OPTPAR_RAE | MLX5_QP_OPTPAR_RWE | MLX5_QP_OPTPAR_PKEY_INDEX, [MLX5_QP_ST_UC] = MLX5_QP_OPTPAR_ALT_ADDR_PATH | MLX5_QP_OPTPAR_RWE | MLX5_QP_OPTPAR_PKEY_INDEX, [MLX5_QP_ST_UD] = MLX5_QP_OPTPAR_PKEY_INDEX | MLX5_QP_OPTPAR_Q_KEY, [MLX5_QP_ST_MLX] = MLX5_QP_OPTPAR_PKEY_INDEX | MLX5_QP_OPTPAR_Q_KEY, }, }, [MLX5_QP_STATE_RTR] = { [MLX5_QP_STATE_RTS] = { [MLX5_QP_ST_RC] = MLX5_QP_OPTPAR_ALT_ADDR_PATH | MLX5_QP_OPTPAR_RRE | MLX5_QP_OPTPAR_RAE | MLX5_QP_OPTPAR_RWE | MLX5_QP_OPTPAR_PM_STATE | MLX5_QP_OPTPAR_RNR_TIMEOUT, [MLX5_QP_ST_UC] = MLX5_QP_OPTPAR_ALT_ADDR_PATH | MLX5_QP_OPTPAR_RWE | MLX5_QP_OPTPAR_PM_STATE, [MLX5_QP_ST_UD] = MLX5_QP_OPTPAR_Q_KEY, }, }, [MLX5_QP_STATE_RTS] = { [MLX5_QP_STATE_RTS] = { [MLX5_QP_ST_RC] = MLX5_QP_OPTPAR_RRE | MLX5_QP_OPTPAR_RAE | MLX5_QP_OPTPAR_RWE | MLX5_QP_OPTPAR_RNR_TIMEOUT | MLX5_QP_OPTPAR_PM_STATE, [MLX5_QP_ST_UC] = MLX5_QP_OPTPAR_RWE | MLX5_QP_OPTPAR_PM_STATE, [MLX5_QP_ST_UD] = MLX5_QP_OPTPAR_Q_KEY | MLX5_QP_OPTPAR_SRQN | MLX5_QP_OPTPAR_CQN_RCV, }, }, [MLX5_QP_STATE_SQER] = { [MLX5_QP_STATE_RTS] = { [MLX5_QP_ST_UD] = MLX5_QP_OPTPAR_Q_KEY, [MLX5_QP_ST_MLX] = MLX5_QP_OPTPAR_Q_KEY, [MLX5_QP_ST_UC] = MLX5_QP_OPTPAR_RWE, }, }, }; static int ib_nr_to_mlx5_nr(int ib_mask) { switch (ib_mask) { case IB_QP_STATE: return 0; case IB_QP_CUR_STATE: return 0; case IB_QP_EN_SQD_ASYNC_NOTIFY: return 0; case IB_QP_ACCESS_FLAGS: return MLX5_QP_OPTPAR_RWE | MLX5_QP_OPTPAR_RRE | MLX5_QP_OPTPAR_RAE; case IB_QP_PKEY_INDEX: return MLX5_QP_OPTPAR_PKEY_INDEX; case IB_QP_PORT: return MLX5_QP_OPTPAR_PRI_PORT; case IB_QP_QKEY: return MLX5_QP_OPTPAR_Q_KEY; case IB_QP_AV: return MLX5_QP_OPTPAR_PRIMARY_ADDR_PATH | MLX5_QP_OPTPAR_PRI_PORT; case IB_QP_PATH_MTU: return 0; case IB_QP_TIMEOUT: return MLX5_QP_OPTPAR_ACK_TIMEOUT; case IB_QP_RETRY_CNT: return MLX5_QP_OPTPAR_RETRY_COUNT; case IB_QP_RNR_RETRY: return MLX5_QP_OPTPAR_RNR_RETRY; case IB_QP_RQ_PSN: return 0; case IB_QP_MAX_QP_RD_ATOMIC: return MLX5_QP_OPTPAR_SRA_MAX; case IB_QP_ALT_PATH: return MLX5_QP_OPTPAR_ALT_ADDR_PATH; case IB_QP_MIN_RNR_TIMER: return MLX5_QP_OPTPAR_RNR_TIMEOUT; case IB_QP_SQ_PSN: return 0; case IB_QP_MAX_DEST_RD_ATOMIC: return MLX5_QP_OPTPAR_RRA_MAX | MLX5_QP_OPTPAR_RWE | MLX5_QP_OPTPAR_RRE | MLX5_QP_OPTPAR_RAE; case IB_QP_PATH_MIG_STATE: return MLX5_QP_OPTPAR_PM_STATE; case IB_QP_CAP: return 0; case IB_QP_DEST_QPN: return 0; } return 0; } static int ib_mask_to_mlx5_opt(int ib_mask) { int result = 0; int i; for (i = 0; i < 8 * sizeof(int); i++) { if ((1 << i) & ib_mask) result |= ib_nr_to_mlx5_nr(1 << i); } return result; } static int __mlx5_ib_modify_qp(struct ib_qp *ibqp, const struct ib_qp_attr *attr, int attr_mask, enum ib_qp_state cur_state, enum ib_qp_state new_state) { struct mlx5_ib_dev *dev = to_mdev(ibqp->device); struct mlx5_ib_qp *qp = to_mqp(ibqp); struct mlx5_ib_cq *send_cq, *recv_cq; struct mlx5_qp_context *context; struct mlx5_modify_qp_mbox_in *in; struct mlx5_ib_pd *pd; enum mlx5_qp_state mlx5_cur, mlx5_new; enum mlx5_qp_optpar optpar; int sqd_event; int mlx5_st; int err; in = kzalloc(sizeof(*in), GFP_KERNEL); if (!in) return -ENOMEM; context = &in->ctx; err = to_mlx5_st(ibqp->qp_type); if (err < 0) goto out; context->flags = cpu_to_be32(err << 16); if (!(attr_mask & IB_QP_PATH_MIG_STATE)) { context->flags |= cpu_to_be32(MLX5_QP_PM_MIGRATED << 11); } else { switch (attr->path_mig_state) { case IB_MIG_MIGRATED: context->flags |= cpu_to_be32(MLX5_QP_PM_MIGRATED << 11); break; case IB_MIG_REARM: context->flags |= cpu_to_be32(MLX5_QP_PM_REARM << 11); break; case IB_MIG_ARMED: context->flags |= cpu_to_be32(MLX5_QP_PM_ARMED << 11); break; } } if (ibqp->qp_type == IB_QPT_GSI || ibqp->qp_type == IB_QPT_SMI) { context->mtu_msgmax = (IB_MTU_256 << 5) | 8; } else if (ibqp->qp_type == IB_QPT_UD || ibqp->qp_type == MLX5_IB_QPT_REG_UMR) { context->mtu_msgmax = (IB_MTU_4096 << 5) | 12; } else if (attr_mask & IB_QP_PATH_MTU) { if (attr->path_mtu < IB_MTU_256 || attr->path_mtu > IB_MTU_4096) { mlx5_ib_warn(dev, "invalid mtu %d\n", attr->path_mtu); err = -EINVAL; goto out; } context->mtu_msgmax = (attr->path_mtu << 5) | dev->mdev.caps.log_max_msg; } if (attr_mask & IB_QP_DEST_QPN) context->log_pg_sz_remote_qpn = cpu_to_be32(attr->dest_qp_num); if (attr_mask & IB_QP_PKEY_INDEX) context->pri_path.pkey_index = attr->pkey_index; /* todo implement counter_index functionality */ if (is_sqp(ibqp->qp_type)) context->pri_path.port = qp->port; if (attr_mask & IB_QP_PORT) context->pri_path.port = attr->port_num; if (attr_mask & IB_QP_AV) { err = mlx5_set_path(dev, &attr->ah_attr, &context->pri_path, attr_mask & IB_QP_PORT ? attr->port_num : qp->port, attr_mask, 0, attr); if (err) goto out; } if (attr_mask & IB_QP_TIMEOUT) context->pri_path.ackto_lt |= attr->timeout << 3; if (attr_mask & IB_QP_ALT_PATH) { err = mlx5_set_path(dev, &attr->alt_ah_attr, &context->alt_path, attr->alt_port_num, attr_mask, 0, attr); if (err) goto out; } pd = get_pd(qp); get_cqs(qp, &send_cq, &recv_cq); context->flags_pd = cpu_to_be32(pd ? pd->pdn : to_mpd(dev->devr.p0)->pdn); context->cqn_send = send_cq ? cpu_to_be32(send_cq->mcq.cqn) : 0; context->cqn_recv = recv_cq ? cpu_to_be32(recv_cq->mcq.cqn) : 0; context->params1 = cpu_to_be32(MLX5_IB_ACK_REQ_FREQ << 28); if (attr_mask & IB_QP_RNR_RETRY) context->params1 |= cpu_to_be32(attr->rnr_retry << 13); if (attr_mask & IB_QP_RETRY_CNT) context->params1 |= cpu_to_be32(attr->retry_cnt << 16); if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC) { if (attr->max_rd_atomic) context->params1 |= cpu_to_be32(fls(attr->max_rd_atomic - 1) << 21); } if (attr_mask & IB_QP_SQ_PSN) context->next_send_psn = cpu_to_be32(attr->sq_psn); if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) { if (attr->max_dest_rd_atomic) context->params2 |= cpu_to_be32(fls(attr->max_dest_rd_atomic - 1) << 21); } if (attr_mask & (IB_QP_ACCESS_FLAGS | IB_QP_MAX_DEST_RD_ATOMIC)) context->params2 |= to_mlx5_access_flags(qp, attr, attr_mask); if (attr_mask & IB_QP_MIN_RNR_TIMER) context->rnr_nextrecvpsn |= cpu_to_be32(attr->min_rnr_timer << 24); if (attr_mask & IB_QP_RQ_PSN) context->rnr_nextrecvpsn |= cpu_to_be32(attr->rq_psn); if (attr_mask & IB_QP_QKEY) context->qkey = cpu_to_be32(attr->qkey); if (qp->rq.wqe_cnt && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) context->db_rec_addr = cpu_to_be64(qp->db.dma); if (cur_state == IB_QPS_RTS && new_state == IB_QPS_SQD && attr_mask & IB_QP_EN_SQD_ASYNC_NOTIFY && attr->en_sqd_async_notify) sqd_event = 1; else sqd_event = 0; if (!ibqp->uobject && cur_state == IB_QPS_RESET && new_state == IB_QPS_INIT) context->sq_crq_size |= cpu_to_be16(1 << 4); mlx5_cur = to_mlx5_state(cur_state); mlx5_new = to_mlx5_state(new_state); mlx5_st = to_mlx5_st(ibqp->qp_type); if (mlx5_cur < 0 || mlx5_new < 0 || mlx5_st < 0) goto out; optpar = ib_mask_to_mlx5_opt(attr_mask); optpar &= opt_mask[mlx5_cur][mlx5_new][mlx5_st]; in->optparam = cpu_to_be32(optpar); err = mlx5_core_qp_modify(&dev->mdev, to_mlx5_state(cur_state), to_mlx5_state(new_state), in, sqd_event, &qp->mqp); if (err) goto out; qp->state = new_state; if (attr_mask & IB_QP_ACCESS_FLAGS) qp->atomic_rd_en = attr->qp_access_flags; if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC) qp->resp_depth = attr->max_dest_rd_atomic; if (attr_mask & IB_QP_PORT) qp->port = attr->port_num; if (attr_mask & IB_QP_ALT_PATH) qp->alt_port = attr->alt_port_num; /* * If we moved a kernel QP to RESET, clean up all old CQ * entries and reinitialize the QP. */ if (new_state == IB_QPS_RESET && !ibqp->uobject) { mlx5_ib_cq_clean(recv_cq, qp->mqp.qpn, ibqp->srq ? to_msrq(ibqp->srq) : NULL); if (send_cq != recv_cq) mlx5_ib_cq_clean(send_cq, qp->mqp.qpn, NULL); qp->rq.head = 0; qp->rq.tail = 0; qp->sq.head = 0; qp->sq.tail = 0; qp->sq.cur_post = 0; qp->sq.last_poll = 0; qp->db.db[MLX5_RCV_DBR] = 0; qp->db.db[MLX5_SND_DBR] = 0; } out: kfree(in); return err; } int mlx5_ib_modify_qp(struct ib_qp *ibqp, struct ib_qp_attr *attr, int attr_mask, struct ib_udata *udata) { struct mlx5_ib_dev *dev = to_mdev(ibqp->device); struct mlx5_ib_qp *qp = to_mqp(ibqp); enum ib_qp_state cur_state, new_state; int err = -EINVAL; int port; mutex_lock(&qp->mutex); cur_state = attr_mask & IB_QP_CUR_STATE ? attr->cur_qp_state : qp->state; new_state = attr_mask & IB_QP_STATE ? attr->qp_state : cur_state; if (ibqp->qp_type != MLX5_IB_QPT_REG_UMR && !ib_modify_qp_is_ok(cur_state, new_state, ibqp->qp_type, attr_mask)) goto out; if ((attr_mask & IB_QP_PORT) && (attr->port_num == 0 || attr->port_num > dev->mdev.caps.num_ports)) goto out; if (attr_mask & IB_QP_PKEY_INDEX) { port = attr_mask & IB_QP_PORT ? attr->port_num : qp->port; if (attr->pkey_index >= dev->mdev.caps.port[port - 1].pkey_table_len) goto out; } if (attr_mask & IB_QP_MAX_QP_RD_ATOMIC && attr->max_rd_atomic > dev->mdev.caps.max_ra_res_qp) goto out; if (attr_mask & IB_QP_MAX_DEST_RD_ATOMIC && attr->max_dest_rd_atomic > dev->mdev.caps.max_ra_req_qp) goto out; if (cur_state == new_state && cur_state == IB_QPS_RESET) { err = 0; goto out; } err = __mlx5_ib_modify_qp(ibqp, attr, attr_mask, cur_state, new_state); out: mutex_unlock(&qp->mutex); return err; } static int mlx5_wq_overflow(struct mlx5_ib_wq *wq, int nreq, struct ib_cq *ib_cq) { struct mlx5_ib_cq *cq; unsigned cur; cur = wq->head - wq->tail; if (likely(cur + nreq < wq->max_post)) return 0; cq = to_mcq(ib_cq); spin_lock(&cq->lock); cur = wq->head - wq->tail; spin_unlock(&cq->lock); return cur + nreq >= wq->max_post; } static __always_inline void set_raddr_seg(struct mlx5_wqe_raddr_seg *rseg, u64 remote_addr, u32 rkey) { rseg->raddr = cpu_to_be64(remote_addr); rseg->rkey = cpu_to_be32(rkey); rseg->reserved = 0; } static void set_datagram_seg(struct mlx5_wqe_datagram_seg *dseg, struct ib_send_wr *wr) { memcpy(&dseg->av, &to_mah(wr->wr.ud.ah)->av, sizeof(struct mlx5_av)); dseg->av.dqp_dct = cpu_to_be32(wr->wr.ud.remote_qpn | MLX5_EXTENDED_UD_AV); dseg->av.key.qkey.qkey = cpu_to_be32(wr->wr.ud.remote_qkey); } static void set_data_ptr_seg(struct mlx5_wqe_data_seg *dseg, struct ib_sge *sg) { dseg->byte_count = cpu_to_be32(sg->length); dseg->lkey = cpu_to_be32(sg->lkey); dseg->addr = cpu_to_be64(sg->addr); } static __be16 get_klm_octo(int npages) { return cpu_to_be16(ALIGN(npages, 8) / 2); } static __be64 frwr_mkey_mask(void) { u64 result; result = MLX5_MKEY_MASK_LEN | MLX5_MKEY_MASK_PAGE_SIZE | MLX5_MKEY_MASK_START_ADDR | MLX5_MKEY_MASK_EN_RINVAL | MLX5_MKEY_MASK_KEY | MLX5_MKEY_MASK_LR | MLX5_MKEY_MASK_LW | MLX5_MKEY_MASK_RR | MLX5_MKEY_MASK_RW | MLX5_MKEY_MASK_A | MLX5_MKEY_MASK_SMALL_FENCE | MLX5_MKEY_MASK_FREE; return cpu_to_be64(result); } static void set_frwr_umr_segment(struct mlx5_wqe_umr_ctrl_seg *umr, struct ib_send_wr *wr, int li) { memset(umr, 0, sizeof(*umr)); if (li) { umr->mkey_mask = cpu_to_be64(MLX5_MKEY_MASK_FREE); umr->flags = 1 << 7; return; } umr->flags = (1 << 5); /* fail if not free */ umr->klm_octowords = get_klm_octo(wr->wr.fast_reg.page_list_len); umr->mkey_mask = frwr_mkey_mask(); } static void set_reg_umr_segment(struct mlx5_wqe_umr_ctrl_seg *umr, struct ib_send_wr *wr) { struct umr_wr *umrwr = (struct umr_wr *)&wr->wr.fast_reg; u64 mask; memset(umr, 0, sizeof(*umr)); if (!(wr->send_flags & MLX5_IB_SEND_UMR_UNREG)) { umr->flags = 1 << 5; /* fail if not free */ umr->klm_octowords = get_klm_octo(umrwr->npages); mask = MLX5_MKEY_MASK_LEN | MLX5_MKEY_MASK_PAGE_SIZE | MLX5_MKEY_MASK_START_ADDR | MLX5_MKEY_MASK_PD | MLX5_MKEY_MASK_LR | MLX5_MKEY_MASK_LW | MLX5_MKEY_MASK_RR | MLX5_MKEY_MASK_RW | MLX5_MKEY_MASK_A | MLX5_MKEY_MASK_FREE; umr->mkey_mask = cpu_to_be64(mask); } else { umr->flags = 2 << 5; /* fail if free */ mask = MLX5_MKEY_MASK_FREE; umr->mkey_mask = cpu_to_be64(mask); } if (!wr->num_sge) umr->flags |= (1 << 7); /* inline */ } static u8 get_umr_flags(int acc) { return (acc & IB_ACCESS_REMOTE_ATOMIC ? MLX5_PERM_ATOMIC : 0) | (acc & IB_ACCESS_REMOTE_WRITE ? MLX5_PERM_REMOTE_WRITE : 0) | (acc & IB_ACCESS_REMOTE_READ ? MLX5_PERM_REMOTE_READ : 0) | (acc & IB_ACCESS_LOCAL_WRITE ? MLX5_PERM_LOCAL_WRITE : 0) | MLX5_PERM_LOCAL_READ | MLX5_PERM_UMR_EN | MLX5_ACCESS_MODE_MTT; } static void set_mkey_segment(struct mlx5_mkey_seg *seg, struct ib_send_wr *wr, int li, int *writ) { memset(seg, 0, sizeof(*seg)); if (li) { seg->status = 1 << 6; return; } seg->flags = get_umr_flags(wr->wr.fast_reg.access_flags); *writ = seg->flags & (MLX5_PERM_LOCAL_WRITE | IB_ACCESS_REMOTE_WRITE); seg->qpn_mkey7_0 = cpu_to_be32((wr->wr.fast_reg.rkey & 0xff) | 0xffffff00); seg->flags_pd = cpu_to_be32(MLX5_MKEY_REMOTE_INVAL); seg->start_addr = cpu_to_be64(wr->wr.fast_reg.iova_start); seg->len = cpu_to_be64(wr->wr.fast_reg.length); seg->xlt_oct_size = cpu_to_be32((wr->wr.fast_reg.page_list_len + 1) / 2); seg->log2_page_size = wr->wr.fast_reg.page_shift; } static void set_reg_mkey_segment(struct mlx5_mkey_seg *seg, struct ib_send_wr *wr) { memset(seg, 0, sizeof(*seg)); if (wr->send_flags & MLX5_IB_SEND_UMR_UNREG) { seg->status = 1 << 6; return; } seg->flags = convert_access(wr->wr.fast_reg.access_flags); seg->flags_pd = cpu_to_be32(to_mpd((struct ib_pd *)wr->wr.fast_reg.page_list)->pdn); seg->start_addr = cpu_to_be64(wr->wr.fast_reg.iova_start); seg->len = cpu_to_be64(wr->wr.fast_reg.length); seg->log2_page_size = wr->wr.fast_reg.page_shift; seg->qpn_mkey7_0 = cpu_to_be32(0xffffff << 8); } static void set_frwr_pages(struct mlx5_wqe_data_seg *dseg, struct ib_send_wr *wr, struct mlx5_core_dev *mdev, struct mlx5_ib_pd *pd, int writ) { struct mlx5_ib_fast_reg_page_list *mfrpl = to_mfrpl(wr->wr.fast_reg.page_list); u64 *page_list = wr->wr.fast_reg.page_list->page_list; u64 perm = MLX5_EN_RD | (writ ? MLX5_EN_WR : 0); int i; for (i = 0; i < wr->wr.fast_reg.page_list_len; i++) mfrpl->mapped_page_list[i] = cpu_to_be64(page_list[i] | perm); dseg->addr = cpu_to_be64(mfrpl->map); dseg->byte_count = cpu_to_be32(ALIGN(sizeof(u64) * wr->wr.fast_reg.page_list_len, 64)); dseg->lkey = cpu_to_be32(pd->pa_lkey); } static __be32 send_ieth(struct ib_send_wr *wr) { switch (wr->opcode) { case IB_WR_SEND_WITH_IMM: case IB_WR_RDMA_WRITE_WITH_IMM: return wr->ex.imm_data; case IB_WR_SEND_WITH_INV: return cpu_to_be32(wr->ex.invalidate_rkey); default: return 0; } } static u8 calc_sig(void *wqe, int size) { u8 *p = wqe; u8 res = 0; int i; for (i = 0; i < size; i++) res ^= p[i]; return ~res; } static u8 wq_sig(void *wqe) { return calc_sig(wqe, (*((u8 *)wqe + 8) & 0x3f) << 4); } static int set_data_inl_seg(struct mlx5_ib_qp *qp, struct ib_send_wr *wr, void *wqe, int *sz) { struct mlx5_wqe_inline_seg *seg; void *qend = qp->sq.qend; void *addr; int inl = 0; int copy; int len; int i; seg = wqe; wqe += sizeof(*seg); for (i = 0; i < wr->num_sge; i++) { addr = (void *)(unsigned long)(wr->sg_list[i].addr); len = wr->sg_list[i].length; inl += len; if (unlikely(inl > qp->max_inline_data)) return -ENOMEM; if (unlikely(wqe + len > qend)) { copy = qend - wqe; memcpy(wqe, addr, copy); addr += copy; len -= copy; wqe = mlx5_get_send_wqe(qp, 0); } memcpy(wqe, addr, len); wqe += len; } seg->byte_count = cpu_to_be32(inl | MLX5_INLINE_SEG); *sz = ALIGN(inl + sizeof(seg->byte_count), 16) / 16; return 0; } static int set_frwr_li_wr(void **seg, struct ib_send_wr *wr, int *size, struct mlx5_core_dev *mdev, struct mlx5_ib_pd *pd, struct mlx5_ib_qp *qp) { int writ = 0; int li; li = wr->opcode == IB_WR_LOCAL_INV ? 1 : 0; if (unlikely(wr->send_flags & IB_SEND_INLINE)) return -EINVAL; set_frwr_umr_segment(*seg, wr, li); *seg += sizeof(struct mlx5_wqe_umr_ctrl_seg); *size += sizeof(struct mlx5_wqe_umr_ctrl_seg) / 16; if (unlikely((*seg == qp->sq.qend))) *seg = mlx5_get_send_wqe(qp, 0); set_mkey_segment(*seg, wr, li, &writ); *seg += sizeof(struct mlx5_mkey_seg); *size += sizeof(struct mlx5_mkey_seg) / 16; if (unlikely((*seg == qp->sq.qend))) *seg = mlx5_get_send_wqe(qp, 0); if (!li) { set_frwr_pages(*seg, wr, mdev, pd, writ); *seg += sizeof(struct mlx5_wqe_data_seg); *size += (sizeof(struct mlx5_wqe_data_seg) / 16); } return 0; } static void dump_wqe(struct mlx5_ib_qp *qp, int idx, int size_16) { __be32 *p = NULL; int tidx = idx; int i, j; pr_debug("dump wqe at %p\n", mlx5_get_send_wqe(qp, tidx)); for (i = 0, j = 0; i < size_16 * 4; i += 4, j += 4) { if ((i & 0xf) == 0) { void *buf = mlx5_get_send_wqe(qp, tidx); tidx = (tidx + 1) & (qp->sq.wqe_cnt - 1); p = buf; j = 0; } pr_debug("%08x %08x %08x %08x\n", be32_to_cpu(p[j]), be32_to_cpu(p[j + 1]), be32_to_cpu(p[j + 2]), be32_to_cpu(p[j + 3])); } } static void mlx5_bf_copy(u64 __iomem *dst, u64 *src, unsigned bytecnt, struct mlx5_ib_qp *qp) { while (bytecnt > 0) { __iowrite64_copy(dst++, src++, 8); __iowrite64_copy(dst++, src++, 8); __iowrite64_copy(dst++, src++, 8); __iowrite64_copy(dst++, src++, 8); __iowrite64_copy(dst++, src++, 8); __iowrite64_copy(dst++, src++, 8); __iowrite64_copy(dst++, src++, 8); __iowrite64_copy(dst++, src++, 8); bytecnt -= 64; if (unlikely(src == qp->sq.qend)) src = mlx5_get_send_wqe(qp, 0); } } static u8 get_fence(u8 fence, struct ib_send_wr *wr) { if (unlikely(wr->opcode == IB_WR_LOCAL_INV && wr->send_flags & IB_SEND_FENCE)) return MLX5_FENCE_MODE_STRONG_ORDERING; if (unlikely(fence)) { if (wr->send_flags & IB_SEND_FENCE) return MLX5_FENCE_MODE_SMALL_AND_FENCE; else return fence; } else { return 0; } } int mlx5_ib_post_send(struct ib_qp *ibqp, struct ib_send_wr *wr, struct ib_send_wr **bad_wr) { struct mlx5_wqe_ctrl_seg *ctrl = NULL; /* compiler warning */ struct mlx5_ib_dev *dev = to_mdev(ibqp->device); struct mlx5_core_dev *mdev = &dev->mdev; struct mlx5_ib_qp *qp = to_mqp(ibqp); struct mlx5_wqe_data_seg *dpseg; struct mlx5_wqe_xrc_seg *xrc; struct mlx5_bf *bf = qp->bf; int uninitialized_var(size); void *qend = qp->sq.qend; unsigned long flags; u32 mlx5_opcode; unsigned idx; int err = 0; int inl = 0; int num_sge; void *seg; int nreq; int i; u8 next_fence = 0; u8 opmod = 0; u8 fence; spin_lock_irqsave(&qp->sq.lock, flags); for (nreq = 0; wr; nreq++, wr = wr->next) { if (unlikely(wr->opcode >= sizeof(mlx5_ib_opcode) / sizeof(mlx5_ib_opcode[0]))) { mlx5_ib_warn(dev, "\n"); err = -EINVAL; *bad_wr = wr; goto out; } if (unlikely(mlx5_wq_overflow(&qp->sq, nreq, qp->ibqp.send_cq))) { mlx5_ib_warn(dev, "\n"); err = -ENOMEM; *bad_wr = wr; goto out; } fence = qp->fm_cache; num_sge = wr->num_sge; if (unlikely(num_sge > qp->sq.max_gs)) { mlx5_ib_warn(dev, "\n"); err = -ENOMEM; *bad_wr = wr; goto out; } idx = qp->sq.cur_post & (qp->sq.wqe_cnt - 1); seg = mlx5_get_send_wqe(qp, idx); ctrl = seg; *(uint32_t *)(seg + 8) = 0; ctrl->imm = send_ieth(wr); ctrl->fm_ce_se = qp->sq_signal_bits | (wr->send_flags & IB_SEND_SIGNALED ? MLX5_WQE_CTRL_CQ_UPDATE : 0) | (wr->send_flags & IB_SEND_SOLICITED ? MLX5_WQE_CTRL_SOLICITED : 0); seg += sizeof(*ctrl); size = sizeof(*ctrl) / 16; switch (ibqp->qp_type) { case IB_QPT_XRC_INI: xrc = seg; xrc->xrc_srqn = htonl(wr->xrc_remote_srq_num); seg += sizeof(*xrc); size += sizeof(*xrc) / 16; /* fall through */ case IB_QPT_RC: switch (wr->opcode) { case IB_WR_RDMA_READ: case IB_WR_RDMA_WRITE: case IB_WR_RDMA_WRITE_WITH_IMM: set_raddr_seg(seg, wr->wr.rdma.remote_addr, wr->wr.rdma.rkey); seg += sizeof(struct mlx5_wqe_raddr_seg); size += sizeof(struct mlx5_wqe_raddr_seg) / 16; break; case IB_WR_ATOMIC_CMP_AND_SWP: case IB_WR_ATOMIC_FETCH_AND_ADD: case IB_WR_MASKED_ATOMIC_CMP_AND_SWP: mlx5_ib_warn(dev, "Atomic operations are not supported yet\n"); err = -ENOSYS; *bad_wr = wr; goto out; case IB_WR_LOCAL_INV: next_fence = MLX5_FENCE_MODE_INITIATOR_SMALL; qp->sq.wr_data[idx] = IB_WR_LOCAL_INV; ctrl->imm = cpu_to_be32(wr->ex.invalidate_rkey); err = set_frwr_li_wr(&seg, wr, &size, mdev, to_mpd(ibqp->pd), qp); if (err) { mlx5_ib_warn(dev, "\n"); *bad_wr = wr; goto out; } num_sge = 0; break; case IB_WR_FAST_REG_MR: next_fence = MLX5_FENCE_MODE_INITIATOR_SMALL; qp->sq.wr_data[idx] = IB_WR_FAST_REG_MR; ctrl->imm = cpu_to_be32(wr->wr.fast_reg.rkey); err = set_frwr_li_wr(&seg, wr, &size, mdev, to_mpd(ibqp->pd), qp); if (err) { mlx5_ib_warn(dev, "\n"); *bad_wr = wr; goto out; } num_sge = 0; break; default: break; } break; case IB_QPT_UC: switch (wr->opcode) { case IB_WR_RDMA_WRITE: case IB_WR_RDMA_WRITE_WITH_IMM: set_raddr_seg(seg, wr->wr.rdma.remote_addr, wr->wr.rdma.rkey); seg += sizeof(struct mlx5_wqe_raddr_seg); size += sizeof(struct mlx5_wqe_raddr_seg) / 16; break; default: break; } break; case IB_QPT_UD: case IB_QPT_SMI: case IB_QPT_GSI: set_datagram_seg(seg, wr); seg += sizeof(struct mlx5_wqe_datagram_seg); size += sizeof(struct mlx5_wqe_datagram_seg) / 16; if (unlikely((seg == qend))) seg = mlx5_get_send_wqe(qp, 0); break; case MLX5_IB_QPT_REG_UMR: if (wr->opcode != MLX5_IB_WR_UMR) { err = -EINVAL; mlx5_ib_warn(dev, "bad opcode\n"); goto out; } qp->sq.wr_data[idx] = MLX5_IB_WR_UMR; ctrl->imm = cpu_to_be32(wr->wr.fast_reg.rkey); set_reg_umr_segment(seg, wr); seg += sizeof(struct mlx5_wqe_umr_ctrl_seg); size += sizeof(struct mlx5_wqe_umr_ctrl_seg) / 16; if (unlikely((seg == qend))) seg = mlx5_get_send_wqe(qp, 0); set_reg_mkey_segment(seg, wr); seg += sizeof(struct mlx5_mkey_seg); size += sizeof(struct mlx5_mkey_seg) / 16; if (unlikely((seg == qend))) seg = mlx5_get_send_wqe(qp, 0); break; default: break; } if (wr->send_flags & IB_SEND_INLINE && num_sge) { int uninitialized_var(sz); err = set_data_inl_seg(qp, wr, seg, &sz); if (unlikely(err)) { mlx5_ib_warn(dev, "\n"); *bad_wr = wr; goto out; } inl = 1; size += sz; } else { dpseg = seg; for (i = 0; i < num_sge; i++) { if (unlikely(dpseg == qend)) { seg = mlx5_get_send_wqe(qp, 0); dpseg = seg; } if (likely(wr->sg_list[i].length)) { set_data_ptr_seg(dpseg, wr->sg_list + i); size += sizeof(struct mlx5_wqe_data_seg) / 16; dpseg++; } } } mlx5_opcode = mlx5_ib_opcode[wr->opcode]; ctrl->opmod_idx_opcode = cpu_to_be32(((u32)(qp->sq.cur_post) << 8) | mlx5_opcode | ((u32)opmod << 24)); ctrl->qpn_ds = cpu_to_be32(size | (qp->mqp.qpn << 8)); ctrl->fm_ce_se |= get_fence(fence, wr); qp->fm_cache = next_fence; if (unlikely(qp->wq_sig)) ctrl->signature = wq_sig(ctrl); qp->sq.wrid[idx] = wr->wr_id; qp->sq.w_list[idx].opcode = mlx5_opcode; qp->sq.wqe_head[idx] = qp->sq.head + nreq; qp->sq.cur_post += DIV_ROUND_UP(size * 16, MLX5_SEND_WQE_BB); qp->sq.w_list[idx].next = qp->sq.cur_post; if (0) dump_wqe(qp, idx, size); } out: if (likely(nreq)) { qp->sq.head += nreq; /* Make sure that descriptors are written before * updating doorbell record and ringing the doorbell */ wmb(); qp->db.db[MLX5_SND_DBR] = cpu_to_be32(qp->sq.cur_post); if (bf->need_lock) spin_lock(&bf->lock); /* TBD enable WC */ if (0 && nreq == 1 && bf->uuarn && inl && size > 1 && size <= bf->buf_size / 16) { mlx5_bf_copy(bf->reg + bf->offset, (u64 *)ctrl, ALIGN(size * 16, 64), qp); /* wc_wmb(); */ } else { mlx5_write64((__be32 *)ctrl, bf->regreg + bf->offset, MLX5_GET_DOORBELL_LOCK(&bf->lock32)); /* Make sure doorbells don't leak out of SQ spinlock * and reach the HCA out of order. */ mmiowb(); } bf->offset ^= bf->buf_size; if (bf->need_lock) spin_unlock(&bf->lock); } spin_unlock_irqrestore(&qp->sq.lock, flags); return err; } static void set_sig_seg(struct mlx5_rwqe_sig *sig, int size) { sig->signature = calc_sig(sig, size); } int mlx5_ib_post_recv(struct ib_qp *ibqp, struct ib_recv_wr *wr, struct ib_recv_wr **bad_wr) { struct mlx5_ib_qp *qp = to_mqp(ibqp); struct mlx5_wqe_data_seg *scat; struct mlx5_rwqe_sig *sig; unsigned long flags; int err = 0; int nreq; int ind; int i; spin_lock_irqsave(&qp->rq.lock, flags); ind = qp->rq.head & (qp->rq.wqe_cnt - 1); for (nreq = 0; wr; nreq++, wr = wr->next) { if (mlx5_wq_overflow(&qp->rq, nreq, qp->ibqp.recv_cq)) { err = -ENOMEM; *bad_wr = wr; goto out; } if (unlikely(wr->num_sge > qp->rq.max_gs)) { err = -EINVAL; *bad_wr = wr; goto out; } scat = get_recv_wqe(qp, ind); if (qp->wq_sig) scat++; for (i = 0; i < wr->num_sge; i++) set_data_ptr_seg(scat + i, wr->sg_list + i); if (i < qp->rq.max_gs) { scat[i].byte_count = 0; scat[i].lkey = cpu_to_be32(MLX5_INVALID_LKEY); scat[i].addr = 0; } if (qp->wq_sig) { sig = (struct mlx5_rwqe_sig *)scat; set_sig_seg(sig, (qp->rq.max_gs + 1) << 2); } qp->rq.wrid[ind] = wr->wr_id; ind = (ind + 1) & (qp->rq.wqe_cnt - 1); } out: if (likely(nreq)) { qp->rq.head += nreq; /* Make sure that descriptors are written before * doorbell record. */ wmb(); *qp->db.db = cpu_to_be32(qp->rq.head & 0xffff); } spin_unlock_irqrestore(&qp->rq.lock, flags); return err; } static inline enum ib_qp_state to_ib_qp_state(enum mlx5_qp_state mlx5_state) { switch (mlx5_state) { case MLX5_QP_STATE_RST: return IB_QPS_RESET; case MLX5_QP_STATE_INIT: return IB_QPS_INIT; case MLX5_QP_STATE_RTR: return IB_QPS_RTR; case MLX5_QP_STATE_RTS: return IB_QPS_RTS; case MLX5_QP_STATE_SQ_DRAINING: case MLX5_QP_STATE_SQD: return IB_QPS_SQD; case MLX5_QP_STATE_SQER: return IB_QPS_SQE; case MLX5_QP_STATE_ERR: return IB_QPS_ERR; default: return -1; } } static inline enum ib_mig_state to_ib_mig_state(int mlx5_mig_state) { switch (mlx5_mig_state) { case MLX5_QP_PM_ARMED: return IB_MIG_ARMED; case MLX5_QP_PM_REARM: return IB_MIG_REARM; case MLX5_QP_PM_MIGRATED: return IB_MIG_MIGRATED; default: return -1; } } static int to_ib_qp_access_flags(int mlx5_flags) { int ib_flags = 0; if (mlx5_flags & MLX5_QP_BIT_RRE) ib_flags |= IB_ACCESS_REMOTE_READ; if (mlx5_flags & MLX5_QP_BIT_RWE) ib_flags |= IB_ACCESS_REMOTE_WRITE; if (mlx5_flags & MLX5_QP_BIT_RAE) ib_flags |= IB_ACCESS_REMOTE_ATOMIC; return ib_flags; } static void to_ib_ah_attr(struct mlx5_ib_dev *ibdev, struct ib_ah_attr *ib_ah_attr, struct mlx5_qp_path *path) { struct mlx5_core_dev *dev = &ibdev->mdev; memset(ib_ah_attr, 0, sizeof(*ib_ah_attr)); ib_ah_attr->port_num = path->port; if (ib_ah_attr->port_num == 0 || ib_ah_attr->port_num > dev->caps.num_ports) return; ib_ah_attr->sl = path->sl & 0xf; ib_ah_attr->dlid = be16_to_cpu(path->rlid); ib_ah_attr->src_path_bits = path->grh_mlid & 0x7f; ib_ah_attr->static_rate = path->static_rate ? path->static_rate - 5 : 0; ib_ah_attr->ah_flags = (path->grh_mlid & (1 << 7)) ? IB_AH_GRH : 0; if (ib_ah_attr->ah_flags) { ib_ah_attr->grh.sgid_index = path->mgid_index; ib_ah_attr->grh.hop_limit = path->hop_limit; ib_ah_attr->grh.traffic_class = (be32_to_cpu(path->tclass_flowlabel) >> 20) & 0xff; ib_ah_attr->grh.flow_label = be32_to_cpu(path->tclass_flowlabel) & 0xfffff; memcpy(ib_ah_attr->grh.dgid.raw, path->rgid, sizeof(ib_ah_attr->grh.dgid.raw)); } } int mlx5_ib_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 mlx5_ib_dev *dev = to_mdev(ibqp->device); struct mlx5_ib_qp *qp = to_mqp(ibqp); struct mlx5_query_qp_mbox_out *outb; struct mlx5_qp_context *context; int mlx5_state; int err = 0; mutex_lock(&qp->mutex); outb = kzalloc(sizeof(*outb), GFP_KERNEL); if (!outb) { err = -ENOMEM; goto out; } context = &outb->ctx; err = mlx5_core_qp_query(&dev->mdev, &qp->mqp, outb, sizeof(*outb)); if (err) goto out_free; mlx5_state = be32_to_cpu(context->flags) >> 28; qp->state = to_ib_qp_state(mlx5_state); qp_attr->qp_state = qp->state; qp_attr->path_mtu = context->mtu_msgmax >> 5; qp_attr->path_mig_state = to_ib_mig_state((be32_to_cpu(context->flags) >> 11) & 0x3); qp_attr->qkey = be32_to_cpu(context->qkey); qp_attr->rq_psn = be32_to_cpu(context->rnr_nextrecvpsn) & 0xffffff; qp_attr->sq_psn = be32_to_cpu(context->next_send_psn) & 0xffffff; qp_attr->dest_qp_num = be32_to_cpu(context->log_pg_sz_remote_qpn) & 0xffffff; qp_attr->qp_access_flags = to_ib_qp_access_flags(be32_to_cpu(context->params2)); if (qp->ibqp.qp_type == IB_QPT_RC || qp->ibqp.qp_type == IB_QPT_UC) { to_ib_ah_attr(dev, &qp_attr->ah_attr, &context->pri_path); to_ib_ah_attr(dev, &qp_attr->alt_ah_attr, &context->alt_path); qp_attr->alt_pkey_index = context->alt_path.pkey_index & 0x7f; qp_attr->alt_port_num = qp_attr->alt_ah_attr.port_num; } qp_attr->pkey_index = context->pri_path.pkey_index & 0x7f; qp_attr->port_num = context->pri_path.port; /* qp_attr->en_sqd_async_notify is only applicable in modify qp */ qp_attr->sq_draining = mlx5_state == MLX5_QP_STATE_SQ_DRAINING; qp_attr->max_rd_atomic = 1 << ((be32_to_cpu(context->params1) >> 21) & 0x7); qp_attr->max_dest_rd_atomic = 1 << ((be32_to_cpu(context->params2) >> 21) & 0x7); qp_attr->min_rnr_timer = (be32_to_cpu(context->rnr_nextrecvpsn) >> 24) & 0x1f; qp_attr->timeout = context->pri_path.ackto_lt >> 3; qp_attr->retry_cnt = (be32_to_cpu(context->params1) >> 16) & 0x7; qp_attr->rnr_retry = (be32_to_cpu(context->params1) >> 13) & 0x7; qp_attr->alt_timeout = context->alt_path.ackto_lt >> 3; qp_attr->cur_qp_state = qp_attr->qp_state; qp_attr->cap.max_recv_wr = qp->rq.wqe_cnt; qp_attr->cap.max_recv_sge = qp->rq.max_gs; if (!ibqp->uobject) { qp_attr->cap.max_send_wr = qp->sq.wqe_cnt; qp_attr->cap.max_send_sge = qp->sq.max_gs; } else { qp_attr->cap.max_send_wr = 0; qp_attr->cap.max_send_sge = 0; } /* We don't support inline sends for kernel QPs (yet), and we * don't know what userspace's value should be. */ qp_attr->cap.max_inline_data = 0; qp_init_attr->cap = qp_attr->cap; qp_init_attr->create_flags = 0; if (qp->flags & MLX5_IB_QP_BLOCK_MULTICAST_LOOPBACK) qp_init_attr->create_flags |= IB_QP_CREATE_BLOCK_MULTICAST_LOOPBACK; qp_init_attr->sq_sig_type = qp->sq_signal_bits & MLX5_WQE_CTRL_CQ_UPDATE ? IB_SIGNAL_ALL_WR : IB_SIGNAL_REQ_WR; out_free: kfree(outb); out: mutex_unlock(&qp->mutex); return err; } struct ib_xrcd *mlx5_ib_alloc_xrcd(struct ib_device *ibdev, struct ib_ucontext *context, struct ib_udata *udata) { struct mlx5_ib_dev *dev = to_mdev(ibdev); struct mlx5_ib_xrcd *xrcd; int err; if (!(dev->mdev.caps.flags & MLX5_DEV_CAP_FLAG_XRC)) return ERR_PTR(-ENOSYS); xrcd = kmalloc(sizeof(*xrcd), GFP_KERNEL); if (!xrcd) return ERR_PTR(-ENOMEM); err = mlx5_core_xrcd_alloc(&dev->mdev, &xrcd->xrcdn); if (err) { kfree(xrcd); return ERR_PTR(-ENOMEM); } return &xrcd->ibxrcd; } int mlx5_ib_dealloc_xrcd(struct ib_xrcd *xrcd) { struct mlx5_ib_dev *dev = to_mdev(xrcd->device); u32 xrcdn = to_mxrcd(xrcd)->xrcdn; int err; err = mlx5_core_xrcd_dealloc(&dev->mdev, xrcdn); if (err) { mlx5_ib_warn(dev, "failed to dealloc xrcdn 0x%x\n", xrcdn); return err; } kfree(xrcd); return 0; }