488 lines
12 KiB
C
488 lines
12 KiB
C
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// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
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/*
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* Copyright (c) 2013-2018, Mellanox Technologies inc. All rights reserved.
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*/
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#include <linux/module.h>
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#include <linux/mlx5/qp.h>
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#include <linux/slab.h>
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#include <rdma/ib_umem.h>
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#include <rdma/ib_user_verbs.h>
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#include "mlx5_ib.h"
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#include "srq.h"
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static void *get_wqe(struct mlx5_ib_srq *srq, int n)
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{
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return mlx5_frag_buf_get_wqe(&srq->fbc, n);
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}
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static void mlx5_ib_srq_event(struct mlx5_core_srq *srq, enum mlx5_event type)
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{
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struct ib_event event;
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struct ib_srq *ibsrq = &to_mibsrq(srq)->ibsrq;
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if (ibsrq->event_handler) {
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event.device = ibsrq->device;
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event.element.srq = ibsrq;
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switch (type) {
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case MLX5_EVENT_TYPE_SRQ_RQ_LIMIT:
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event.event = IB_EVENT_SRQ_LIMIT_REACHED;
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break;
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case MLX5_EVENT_TYPE_SRQ_CATAS_ERROR:
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event.event = IB_EVENT_SRQ_ERR;
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break;
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default:
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pr_warn("mlx5_ib: Unexpected event type %d on SRQ %06x\n",
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type, srq->srqn);
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return;
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}
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ibsrq->event_handler(&event, ibsrq->srq_context);
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}
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}
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static int create_srq_user(struct ib_pd *pd, struct mlx5_ib_srq *srq,
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struct mlx5_srq_attr *in,
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struct ib_udata *udata, int buf_size)
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{
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struct mlx5_ib_dev *dev = to_mdev(pd->device);
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struct mlx5_ib_create_srq ucmd = {};
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struct mlx5_ib_ucontext *ucontext = rdma_udata_to_drv_context(
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udata, struct mlx5_ib_ucontext, ibucontext);
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size_t ucmdlen;
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int err;
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int npages;
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int page_shift;
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int ncont;
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u32 offset;
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u32 uidx = MLX5_IB_DEFAULT_UIDX;
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ucmdlen = min(udata->inlen, sizeof(ucmd));
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if (ib_copy_from_udata(&ucmd, udata, ucmdlen)) {
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mlx5_ib_dbg(dev, "failed copy udata\n");
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return -EFAULT;
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}
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if (ucmd.reserved0 || ucmd.reserved1)
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return -EINVAL;
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if (udata->inlen > sizeof(ucmd) &&
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!ib_is_udata_cleared(udata, sizeof(ucmd),
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udata->inlen - sizeof(ucmd)))
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return -EINVAL;
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if (in->type != IB_SRQT_BASIC) {
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err = get_srq_user_index(ucontext, &ucmd, udata->inlen, &uidx);
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if (err)
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return err;
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}
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srq->wq_sig = !!(ucmd.flags & MLX5_SRQ_FLAG_SIGNATURE);
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srq->umem = ib_umem_get(udata, ucmd.buf_addr, buf_size, 0, 0);
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if (IS_ERR(srq->umem)) {
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mlx5_ib_dbg(dev, "failed umem get, size %d\n", buf_size);
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err = PTR_ERR(srq->umem);
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return err;
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}
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mlx5_ib_cont_pages(srq->umem, ucmd.buf_addr, 0, &npages,
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&page_shift, &ncont, NULL);
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err = mlx5_ib_get_buf_offset(ucmd.buf_addr, page_shift,
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&offset);
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if (err) {
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mlx5_ib_warn(dev, "bad offset\n");
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goto err_umem;
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}
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in->pas = kvcalloc(ncont, sizeof(*in->pas), GFP_KERNEL);
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if (!in->pas) {
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err = -ENOMEM;
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goto err_umem;
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}
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mlx5_ib_populate_pas(dev, srq->umem, page_shift, in->pas, 0);
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err = mlx5_ib_db_map_user(ucontext, udata, ucmd.db_addr, &srq->db);
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if (err) {
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mlx5_ib_dbg(dev, "map doorbell failed\n");
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goto err_in;
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}
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in->log_page_size = page_shift - MLX5_ADAPTER_PAGE_SHIFT;
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in->page_offset = offset;
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in->uid = (in->type != IB_SRQT_XRC) ? to_mpd(pd)->uid : 0;
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if (MLX5_CAP_GEN(dev->mdev, cqe_version) == MLX5_CQE_VERSION_V1 &&
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in->type != IB_SRQT_BASIC)
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in->user_index = uidx;
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return 0;
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err_in:
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kvfree(in->pas);
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err_umem:
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ib_umem_release(srq->umem);
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return err;
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}
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static int create_srq_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_srq *srq,
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struct mlx5_srq_attr *in, int buf_size)
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{
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int err;
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int i;
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struct mlx5_wqe_srq_next_seg *next;
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err = mlx5_db_alloc(dev->mdev, &srq->db);
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if (err) {
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mlx5_ib_warn(dev, "alloc dbell rec failed\n");
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return err;
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}
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if (mlx5_frag_buf_alloc_node(dev->mdev, buf_size, &srq->buf,
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dev->mdev->priv.numa_node)) {
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mlx5_ib_dbg(dev, "buf alloc failed\n");
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err = -ENOMEM;
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goto err_db;
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}
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mlx5_init_fbc(srq->buf.frags, srq->msrq.wqe_shift, ilog2(srq->msrq.max),
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&srq->fbc);
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srq->head = 0;
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srq->tail = srq->msrq.max - 1;
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srq->wqe_ctr = 0;
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for (i = 0; i < srq->msrq.max; i++) {
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next = get_wqe(srq, i);
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next->next_wqe_index =
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cpu_to_be16((i + 1) & (srq->msrq.max - 1));
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}
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mlx5_ib_dbg(dev, "srq->buf.page_shift = %d\n", srq->buf.page_shift);
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in->pas = kvcalloc(srq->buf.npages, sizeof(*in->pas), GFP_KERNEL);
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if (!in->pas) {
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err = -ENOMEM;
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goto err_buf;
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}
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mlx5_fill_page_frag_array(&srq->buf, in->pas);
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srq->wrid = kvmalloc_array(srq->msrq.max, sizeof(u64), GFP_KERNEL);
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if (!srq->wrid) {
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err = -ENOMEM;
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goto err_in;
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}
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srq->wq_sig = 0;
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in->log_page_size = srq->buf.page_shift - MLX5_ADAPTER_PAGE_SHIFT;
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if (MLX5_CAP_GEN(dev->mdev, cqe_version) == MLX5_CQE_VERSION_V1 &&
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in->type != IB_SRQT_BASIC)
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in->user_index = MLX5_IB_DEFAULT_UIDX;
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return 0;
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err_in:
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kvfree(in->pas);
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err_buf:
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mlx5_frag_buf_free(dev->mdev, &srq->buf);
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err_db:
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mlx5_db_free(dev->mdev, &srq->db);
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return err;
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}
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static void destroy_srq_user(struct ib_pd *pd, struct mlx5_ib_srq *srq,
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struct ib_udata *udata)
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{
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mlx5_ib_db_unmap_user(
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rdma_udata_to_drv_context(
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udata,
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struct mlx5_ib_ucontext,
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ibucontext),
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&srq->db);
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ib_umem_release(srq->umem);
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}
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static void destroy_srq_kernel(struct mlx5_ib_dev *dev, struct mlx5_ib_srq *srq)
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{
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kvfree(srq->wrid);
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mlx5_frag_buf_free(dev->mdev, &srq->buf);
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mlx5_db_free(dev->mdev, &srq->db);
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}
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int mlx5_ib_create_srq(struct ib_srq *ib_srq,
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struct ib_srq_init_attr *init_attr,
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struct ib_udata *udata)
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{
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struct mlx5_ib_dev *dev = to_mdev(ib_srq->device);
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struct mlx5_ib_srq *srq = to_msrq(ib_srq);
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size_t desc_size;
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size_t buf_size;
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int err;
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struct mlx5_srq_attr in = {};
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__u32 max_srq_wqes = 1 << MLX5_CAP_GEN(dev->mdev, log_max_srq_sz);
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/* Sanity check SRQ size before proceeding */
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if (init_attr->attr.max_wr >= max_srq_wqes) {
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mlx5_ib_dbg(dev, "max_wr %d, cap %d\n",
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init_attr->attr.max_wr,
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max_srq_wqes);
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return -EINVAL;
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}
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mutex_init(&srq->mutex);
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spin_lock_init(&srq->lock);
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srq->msrq.max = roundup_pow_of_two(init_attr->attr.max_wr + 1);
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srq->msrq.max_gs = init_attr->attr.max_sge;
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desc_size = sizeof(struct mlx5_wqe_srq_next_seg) +
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srq->msrq.max_gs * sizeof(struct mlx5_wqe_data_seg);
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if (desc_size == 0 || srq->msrq.max_gs > desc_size)
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return -EINVAL;
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desc_size = roundup_pow_of_two(desc_size);
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desc_size = max_t(size_t, 32, desc_size);
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if (desc_size < sizeof(struct mlx5_wqe_srq_next_seg))
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return -EINVAL;
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srq->msrq.max_avail_gather = (desc_size - sizeof(struct mlx5_wqe_srq_next_seg)) /
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sizeof(struct mlx5_wqe_data_seg);
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srq->msrq.wqe_shift = ilog2(desc_size);
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buf_size = srq->msrq.max * desc_size;
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if (buf_size < desc_size)
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return -EINVAL;
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in.type = init_attr->srq_type;
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if (udata)
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err = create_srq_user(ib_srq->pd, srq, &in, udata, buf_size);
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else
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err = create_srq_kernel(dev, srq, &in, buf_size);
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if (err) {
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mlx5_ib_warn(dev, "create srq %s failed, err %d\n",
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udata ? "user" : "kernel", err);
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return err;
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}
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in.log_size = ilog2(srq->msrq.max);
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in.wqe_shift = srq->msrq.wqe_shift - 4;
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if (srq->wq_sig)
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in.flags |= MLX5_SRQ_FLAG_WQ_SIG;
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if (init_attr->srq_type == IB_SRQT_XRC)
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in.xrcd = to_mxrcd(init_attr->ext.xrc.xrcd)->xrcdn;
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else
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in.xrcd = to_mxrcd(dev->devr.x0)->xrcdn;
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if (init_attr->srq_type == IB_SRQT_TM) {
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in.tm_log_list_size =
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ilog2(init_attr->ext.tag_matching.max_num_tags) + 1;
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if (in.tm_log_list_size >
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MLX5_CAP_GEN(dev->mdev, log_tag_matching_list_sz)) {
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mlx5_ib_dbg(dev, "TM SRQ max_num_tags exceeding limit\n");
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err = -EINVAL;
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goto err_usr_kern_srq;
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}
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in.flags |= MLX5_SRQ_FLAG_RNDV;
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}
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if (ib_srq_has_cq(init_attr->srq_type))
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in.cqn = to_mcq(init_attr->ext.cq)->mcq.cqn;
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else
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in.cqn = to_mcq(dev->devr.c0)->mcq.cqn;
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in.pd = to_mpd(ib_srq->pd)->pdn;
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in.db_record = srq->db.dma;
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err = mlx5_cmd_create_srq(dev, &srq->msrq, &in);
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kvfree(in.pas);
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if (err) {
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mlx5_ib_dbg(dev, "create SRQ failed, err %d\n", err);
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goto err_usr_kern_srq;
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}
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mlx5_ib_dbg(dev, "create SRQ with srqn 0x%x\n", srq->msrq.srqn);
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srq->msrq.event = mlx5_ib_srq_event;
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srq->ibsrq.ext.xrc.srq_num = srq->msrq.srqn;
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if (udata)
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if (ib_copy_to_udata(udata, &srq->msrq.srqn, sizeof(__u32))) {
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mlx5_ib_dbg(dev, "copy to user failed\n");
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err = -EFAULT;
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goto err_core;
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}
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init_attr->attr.max_wr = srq->msrq.max - 1;
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return 0;
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err_core:
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mlx5_cmd_destroy_srq(dev, &srq->msrq);
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err_usr_kern_srq:
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if (udata)
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destroy_srq_user(ib_srq->pd, srq, udata);
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else
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destroy_srq_kernel(dev, srq);
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return err;
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}
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int mlx5_ib_modify_srq(struct ib_srq *ibsrq, struct ib_srq_attr *attr,
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enum ib_srq_attr_mask attr_mask, struct ib_udata *udata)
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{
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struct mlx5_ib_dev *dev = to_mdev(ibsrq->device);
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|
|
struct mlx5_ib_srq *srq = to_msrq(ibsrq);
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
/* We don't support resizing SRQs yet */
|
||
|
|
if (attr_mask & IB_SRQ_MAX_WR)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
if (attr_mask & IB_SRQ_LIMIT) {
|
||
|
|
if (attr->srq_limit >= srq->msrq.max)
|
||
|
|
return -EINVAL;
|
||
|
|
|
||
|
|
mutex_lock(&srq->mutex);
|
||
|
|
ret = mlx5_cmd_arm_srq(dev, &srq->msrq, attr->srq_limit, 1);
|
||
|
|
mutex_unlock(&srq->mutex);
|
||
|
|
|
||
|
|
if (ret)
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int mlx5_ib_query_srq(struct ib_srq *ibsrq, struct ib_srq_attr *srq_attr)
|
||
|
|
{
|
||
|
|
struct mlx5_ib_dev *dev = to_mdev(ibsrq->device);
|
||
|
|
struct mlx5_ib_srq *srq = to_msrq(ibsrq);
|
||
|
|
int ret;
|
||
|
|
struct mlx5_srq_attr *out;
|
||
|
|
|
||
|
|
out = kzalloc(sizeof(*out), GFP_KERNEL);
|
||
|
|
if (!out)
|
||
|
|
return -ENOMEM;
|
||
|
|
|
||
|
|
ret = mlx5_cmd_query_srq(dev, &srq->msrq, out);
|
||
|
|
if (ret)
|
||
|
|
goto out_box;
|
||
|
|
|
||
|
|
srq_attr->srq_limit = out->lwm;
|
||
|
|
srq_attr->max_wr = srq->msrq.max - 1;
|
||
|
|
srq_attr->max_sge = srq->msrq.max_gs;
|
||
|
|
|
||
|
|
out_box:
|
||
|
|
kfree(out);
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
void mlx5_ib_destroy_srq(struct ib_srq *srq, struct ib_udata *udata)
|
||
|
|
{
|
||
|
|
struct mlx5_ib_dev *dev = to_mdev(srq->device);
|
||
|
|
struct mlx5_ib_srq *msrq = to_msrq(srq);
|
||
|
|
|
||
|
|
mlx5_cmd_destroy_srq(dev, &msrq->msrq);
|
||
|
|
|
||
|
|
if (srq->uobject) {
|
||
|
|
mlx5_ib_db_unmap_user(
|
||
|
|
rdma_udata_to_drv_context(
|
||
|
|
udata,
|
||
|
|
struct mlx5_ib_ucontext,
|
||
|
|
ibucontext),
|
||
|
|
&msrq->db);
|
||
|
|
ib_umem_release(msrq->umem);
|
||
|
|
} else {
|
||
|
|
destroy_srq_kernel(dev, msrq);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void mlx5_ib_free_srq_wqe(struct mlx5_ib_srq *srq, int wqe_index)
|
||
|
|
{
|
||
|
|
struct mlx5_wqe_srq_next_seg *next;
|
||
|
|
|
||
|
|
/* always called with interrupts disabled. */
|
||
|
|
spin_lock(&srq->lock);
|
||
|
|
|
||
|
|
next = get_wqe(srq, srq->tail);
|
||
|
|
next->next_wqe_index = cpu_to_be16(wqe_index);
|
||
|
|
srq->tail = wqe_index;
|
||
|
|
|
||
|
|
spin_unlock(&srq->lock);
|
||
|
|
}
|
||
|
|
|
||
|
|
int mlx5_ib_post_srq_recv(struct ib_srq *ibsrq, const struct ib_recv_wr *wr,
|
||
|
|
const struct ib_recv_wr **bad_wr)
|
||
|
|
{
|
||
|
|
struct mlx5_ib_srq *srq = to_msrq(ibsrq);
|
||
|
|
struct mlx5_wqe_srq_next_seg *next;
|
||
|
|
struct mlx5_wqe_data_seg *scat;
|
||
|
|
struct mlx5_ib_dev *dev = to_mdev(ibsrq->device);
|
||
|
|
struct mlx5_core_dev *mdev = dev->mdev;
|
||
|
|
unsigned long flags;
|
||
|
|
int err = 0;
|
||
|
|
int nreq;
|
||
|
|
int i;
|
||
|
|
|
||
|
|
spin_lock_irqsave(&srq->lock, flags);
|
||
|
|
|
||
|
|
if (mdev->state == MLX5_DEVICE_STATE_INTERNAL_ERROR) {
|
||
|
|
err = -EIO;
|
||
|
|
*bad_wr = wr;
|
||
|
|
goto out;
|
||
|
|
}
|
||
|
|
|
||
|
|
for (nreq = 0; wr; nreq++, wr = wr->next) {
|
||
|
|
if (unlikely(wr->num_sge > srq->msrq.max_gs)) {
|
||
|
|
err = -EINVAL;
|
||
|
|
*bad_wr = wr;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (unlikely(srq->head == srq->tail)) {
|
||
|
|
err = -ENOMEM;
|
||
|
|
*bad_wr = wr;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
srq->wrid[srq->head] = wr->wr_id;
|
||
|
|
|
||
|
|
next = get_wqe(srq, srq->head);
|
||
|
|
srq->head = be16_to_cpu(next->next_wqe_index);
|
||
|
|
scat = (struct mlx5_wqe_data_seg *)(next + 1);
|
||
|
|
|
||
|
|
for (i = 0; i < wr->num_sge; i++) {
|
||
|
|
scat[i].byte_count = cpu_to_be32(wr->sg_list[i].length);
|
||
|
|
scat[i].lkey = cpu_to_be32(wr->sg_list[i].lkey);
|
||
|
|
scat[i].addr = cpu_to_be64(wr->sg_list[i].addr);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (i < srq->msrq.max_avail_gather) {
|
||
|
|
scat[i].byte_count = 0;
|
||
|
|
scat[i].lkey = cpu_to_be32(MLX5_INVALID_LKEY);
|
||
|
|
scat[i].addr = 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (likely(nreq)) {
|
||
|
|
srq->wqe_ctr += nreq;
|
||
|
|
|
||
|
|
/* Make sure that descriptors are written before
|
||
|
|
* doorbell record.
|
||
|
|
*/
|
||
|
|
wmb();
|
||
|
|
|
||
|
|
*srq->db.db = cpu_to_be32(srq->wqe_ctr);
|
||
|
|
}
|
||
|
|
out:
|
||
|
|
spin_unlock_irqrestore(&srq->lock, flags);
|
||
|
|
|
||
|
|
return err;
|
||
|
|
}
|